After the depolarization phase of an action potential, the resting potential is restored by _______. A. the opening of voltage-gated potassium channels and the inactivation of sodium channels B. a decrease in the membrane's permeability to potassium and chloride ions C. a brief inhibition of the sodium-potassium pump D. the opening of more voltage-gated sodium channels
Answers
After depolarization phase of an action potential, the resting membrane potential is restored by A . The opening of voltage-gated potassium channels and the inactivation of sodium channels
After the depolarization of resting membrane potential is completed, and the membrane becomes depolarized, the membrane again comes back to its initial resting membrane potential which is done as after a brief period of time, the sodium channels self-inactivate (close and stop responding to voltage), halting the sodium influx.
The opening of a group of voltage-gated potassium channels lets potassium stream out of the cell via its electrochemical gradient. These occurrences swiftly reduce the membrane potential, returning it to its regular resting state.
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Related Questions
Which of the following contributes to sustainability?
A: Driving to work
B: Drinking bottled water
C: Eating more meat
D: Taking a bus to work
Answers
The statement that contributes to sustainability is to take a bus to work. Thus, the correct option for this question is D.
What is Sustainability?Sustainability may be defined as a type of process that significantly fulfills the needs of current generations without compromising the needs of future generations while ensuring a balance between economic growth, environmental care, and social well-being.
Several actions can take that promote the process of sustainability are as follows:
Turn off lights, computers, TVs, radios, and appliances.Lower your thermostat in winter, and raise it in the summer.Set the refrigerator between 38°F and 42°F, and the freezer between O°F and 5°F.Take shorter showers, shut off the water during brushing, and add a brick to your toilet tank.Reduces the dependency on renewable and non-renewable resources.Therefore, the statement that contributes to sustainability is to take a bus to work. Thus, the correct option for this question is D.
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How would you calculate the distance of a paper airplane
Answers
Answer: uh Well, Your foot should be at the end of the starting line you prepared earlier. Once you're ready, you can throw your plane. Measure the distance the paper plane traveled (in centimeters or meters) from the starting point with the tape measure. Your lab notebook should include this data in a table. "Plane 1" will take off from this point.
Explanation:
Read above-
Which of the following statements describes the structure of the plasma membrane?
a It is a lipid bilayer with the hydrophobic area pointing inward, and the hydrophilic area facing outward.
b Protein molecules make up the membrane, which makes it a strong structure.
c The plasma membrane is made mainly from carbohydrates that give the cell energy.
d It is made primarily of cholesterol that allows the cells to communicate with others.
Answers
Answer:
A. It is a lipid bilayer with the hydrophobic area pointing inward, and the hydrophilic area facing outward.
Explanation:
The plasma membrane (also known as the cell membrane) is a membrane that separates the cell's interior from the environment that surrounds it, protecting it. It consists of lipids, proteins, and carbohydrates.
Its main component are phospholipids that create a bilayer. Phospholipids consist of two hydrophobic tails and a hydrophilic head and are arranged so that the tails face inward and the heads outwards.
This is why option A is the correct one.
You can see an image of the cell membrane's structure to help you visualize this below:
Which of the following is the correct sequence of events in cellular respiration?
a. glycolysis, citric acid cycle, electron transport chain
b. glycolysis, preparatory reaction, citric acid cycle, electron transport chain
c. glycolysis, electron transport chain, preparatory reaction
d. citric acid cycle, glycolysis, electron transport chain, preparatory reaction
e. citric acid cycle, electron transport, glycolysis, preparatory reaction
Answers
The correct answer is (b) glycolysis, preparatory reaction, citric acid cycle and electron transport chain.
What is Cellular Respirationand why is it known as cellular respiration? Cellular respiration is the process that takes place in the mitochondria of organisms (animals and plants) and breaks down sugars in the presence of oxygen to release energy in the form of ATP.Cellular respiration works in the presence or absence of oxygen. But basically, this process is called cellular respiration. This is because cells appear to "breathe" in such a way that they take up molecular oxygen (as an electron acceptor) and release carbon dioxide (as an end product).How is ATP made during cellular respiration?Most of the ATP produced by aerobic cellular respiration is produced by oxidative phosphorylation. The released energy is used to create a chemiosmotic potential by pumping protons across the membrane. This potential is used to power ATP synthase and generate ATP from ADP and phosphate groups.
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which of the following manipulations would you expect to enhance learning in the morris water maze?select all that applygroup of answer choicesreducing atf-4 expressionreducing expression of the glun2b nmdar subunitoverexpressing the glun2b nmdar subunitinhibiting gene transcriptionoverexpressing atf-4inhibiting protein synthesis
Answers
Among the listed manipulations, overexpressing the glun2b NMDAR subunit and reducing the expression of ATF-4 are expected to enhance learning in the Morris water maze. The correct answer is A and C.
In the Morris water maze, a test used to assess spatial learning and memory in rodents, manipulating specific genes and proteins can potentially enhance learning.
The glun2b subunit is an essential component of the NMDA receptor, which plays a critical role in learning and memory processes.
Overexpression of the glun2b subunit has been shown to enhance NMDA receptor function and improve cognitive performance.
On the other hand, reducing the expression of ATF-4, a transcription factor that regulates the expression of genes involved in stress response and protein synthesis, has been shown to enhance long-term potentiation and spatial memory.
Inhibiting gene transcription and protein synthesis, on the other hand, are expected to impair learning and memory as they are essential processes for forming long-term memories.
Therefore, reducing ATF-4 expression and overexpressing the glun2b subunit may enhance learning in the Morris water maze. Therefore, the correct answer is A and C.
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The only function of the cytoplasm is to protect the organelles.
ЕОО
True
False
Answers
Answer:
false
Explanation:
because the cytoplasm also contains substances like enzymes and also regulates the water in and out of the cell
Answer:
false
Explanation:
What two body systems play a role in maintaining blood sugar homeostasis? Choose all that apply. *
Answers
Answer:
Liver and Pancreas
Explanation:
Liver and Pancreas play an important role in maintaining blood sugar homeostasis
The pancreas has cells called Islets of Langerhans which release insulin and glucagon which are responsible for maintaining blood sugar levels.
Liver too plays an important role in the regulation of blood sugar levels by releasing glucose in response to glucagon.
A drought is a period of unusually low
rainfall. A farmer notices that a well on the farm stops providing water
during a drought. A nearby lake also
has less water in it than usual. Write a
couple of sentences that explains
what has happened to the water table
in the area to cause these results.
Answers
In the drought period, the water label usually lowers due to the extreme heat of the sun that forces the water to undergo the process of evaporation and absorb all the water present on the surface.
What is drought?Drought may be defined as a brief period of abnormally dry weather sufficiently prolonged for the lack of water to cause a serious hydrologic imbalance in the affected area.
During severe droughts, people depend heavily on groundwater—the water held underground in aquifers. During these periods, the rainfall is less than normal for several weeks, months, or years, the flow of streams and rivers declines, water levels in lakes and reservoirs fall, and the depth of water in wells gradually increases.
Therefore, in the drought period, the water label usually lowers due to the extreme heat of the sun that forces the water to undergo the process of evaporation and absorb all the water present on the surface.
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Accidental radiation exposure resulted in a germ line mutation in an organism. What is the most likely outcome on the progeny of this organism?
A.The change is not carried forward to the progeny of the organism.
B. The change is carried forward to the progeny of the organism.
C. The change is lost in the progeny of the organism.
Answers
Answer:
A. The change is not carried forward to the progeny of the organism.
Explanation:
which one of the following is true of trnas? a trnas carry special sequences known as codons. b all of the above. c each trna binds a particular codon. d none of the above. e there are four types of trna. f trnas are double-stranded.
Answers
All of the following statements are true about tRNA:
a) tRNA carries special sequences known as codons.
b) Each tRNA binds a particular codon.
c) There are four types of tRNA.
What is a tRNA?tRNA, or transfer RNA, is a small RNA molecule that plays a crucial role in the process of protein synthesis in cells. Protein synthesis occurs in the ribosomes, which are the site of translation in cells. During translation, the information stored in the DNA code is used to synthesize proteins.
tRNA plays a key role in this process by acting as a bridge between the information stored in the DNA code and the sequence of amino acids that make up a protein. Each tRNA molecule carries a specific amino acid and is able to "read" a particular sequence of nucleotides, known as a codon, in the RNA molecule produced during transcription. The tRNA molecule brings the corresponding amino acid to the ribosome, where it is added to the growing protein chain.
In this way, tRNA helps to translate the genetic code stored in DNA into the sequence of amino acids that make up proteins. This process is essential for the proper functioning of cells and is vital for the proper development and function of organisms.
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what do you think will happen if the population of tigers decrease suddenly in Bhutan
Answers
9. What is the economic importance of beekeeping both in terms of pollinating, crops, and obtaining products from the hive? 10. Explain how the spread of trypanosomiasis can be controlled by releasing male sterile tsetse flies in to an area. Date of submission July 07, 2021 Wednesday
Answers
Answer:
9. Bees play a very important role in relation to agricultural production. Indeed beekeeping is a vital part of our agricultural system. Apart from crop plants which are highly dependant on bees, the presence of honey bees also improves the quality and quantity of crops in general.
10. Use insect repellent. Permethrin-impregnated clothing and insect repellent have not been proved to be particularly effective against tsetse flies, but they will prevent other insect bites that can cause illness. The World Health Organization has targeted West African trypanosomiasis for elimination as a public health problem by 2020.
Explanation:
Stephanie likes to party. She buys and drinks large amounts of alcohol. She is finding that the older she gets, the more forgetful she becomes. She often forgets to get up during the night to walk to the bathroom down the hall. So, her grandfather, who also likes to party, told her about this thing called a chamber pot, which she has named Harvey. She has had some success in using Harvey, but unfortunately still forgets to empty Harvey in the mornings before she goes to her 8:00 class. She has decided it is too much of a hassle to empty Harvey every morning. Last Thursday she was carrying Harvey and Harvey's contents to the dumpster at the back of her apartment near Turtle Pond. She turned around and saw her ex, who waved at her. She fought the urge to yell profanities and decided to wave back. Unfortunately, it was at that moment that she remembered she was still holding Harvey. Stephanie dropped Harvey. Harvey broke. Harvey spilled into Turtle Pond. What events most
likely happened after this incident? Choose all that apply and only those that apply.
• a.
Bacterial concentrations increased immediately and by a very large amount.
o b.
Organic carbon decreased and later returned to normal.
• c. Dissolved oxygen decreased and took a long time to return to normal.
D d. Algae decreased slightly and then grew by a very large amount.
• e. BOD levels quickly increased and then returned to normal, but not as fast as cyanobacterial levels.
Of.
Nitrate levels increased but not as much as ammonia levels.
Answers
We can see here that the events that most likely happened after Stephanie dropped Harvey into Turtle Pond are:
b. Organic carbon decreased and later returned to normal.
c. Dissolved oxygen decreased and took a long time to return to normal.
e. BOD levels quickly increased and then returned to normal, but not as fast as cyanobacterial levels.
What is an incident?An incident refers to an event or occurrence that deviates from the normal course of operations or expected behavior. It typically involves an unplanned or disruptive incident that may have negative consequences, requiring attention or intervention to resolve or mitigate its impact.
Incidents can occur in various contexts, such as in the workplace, public settings, or everyday life.
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A newborn has talipes and is wearing casts. how often should the casts be changed?
Answers
For every 5 days, the plaster casts should change for a newborn baby to have talipes.
What is talipes and how do you treat them?Talipes (also called clubfoot) is where a baby is born with a foot that turns in and under. This happens because the Achilles tendon is too short. There are two types of clubfoot:
Isolated or idiopathic clubfootNon-isolated clubfootTreatment for clubfoot starts 1 to 2 weeks after the baby is born. The main treatment, called the Ponseti method, involves gene manipulation and stretching the baby's foot into a better position. It's then put into a cast. This is repeated every week for about 5 to 8 weeks. After the last cast comes off, most babies need a minor operation with a local anesthetic to loosen the Achilles tendon at the back of their ankle. It helps to release their feet into a more natural position.
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Compare the number of mitochondria in the different types of cells.
Answers
Answer:
High amounts of mitochondria are found in skeletal muscle cells, as well as liver cells. On the other hand, skin cells have a small amount of mitochondria.
5. Why isn't the radiometric dating of sedimentary rock exact? O O Because sedimentary rock only forms where there were ancient seas. Because sedimentary rock is constructed of many different layers. Because sedimentary rock is made up of weathered and eroded bits of igneous rock. Because sedimentary rock only contains carbon-14 and no other radioactive isotopes.
Answers
The radiometric dating of sedimentary rock is not exact due to the fact that sedimentary rock is made up of weathered and eroded bits of other rocks, including igneous rocks.
. Why isn't the radiometric dating of sedimentary rock exact?Radiometric dating relies on measuring the abundance of radioactive isotopes and their decay products within a rock sample. However, in the case of sedimentary rock, the minerals within the rock are typically not the original components but rather fragments from different sources. These fragments may have different ages and could have undergone various geological processes before being deposited as sedimentary rock.
As a result, the different minerals and fragments within the sedimentary rock may have different isotopic compositions and ages. When attempting to date a sedimentary rock using radiometric methods, it becomes challenging to accurately determine the initial composition of the minerals and the timing of their formation.
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If the population of rabbits in this ecosystem decreased dramatically because of certain environmental changes, which organisms’ food supply would decrease?
A.
owl and snake
B.
jackal and wildcat
C.
green plant and mouse
D.
goat and wildcat
Answers
Answer:
A. Owl and Snake
Explanation:
A green plant cannot eat a rabbit. Neither can a goat.
B. could be the answer but I believe that A. is the answer because I'm positive that those animals eat rabbits.
Hope this helped :)
Why is competition considered to
be a density-dependent factor?
A. The more individuals there are in an area, the
more competition there will be for resources.
B. It isn't affected by the amount of individuals
or resources in an area.
C. Competition is a density-independent factor.
Answers
Competition often has a density-dependent effect, meaning that as population densities rise, so does competition, hence option A is correct.
What is a density-dependent factor?This is because rivalry typically intensifies as the population increases or as resources decline.
Population density has little impact on intraspecific competition, which happens when individuals of the same species fight with one another for resources like food and space.
Therefore, all species populations in the same habitat will be affected similarly, regardless of size. Some of the contributing elements are the weather, the environment, and natural disasters.
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Answer: A. The more individuals there are in an area, the more competition there will be for resources.
The effect of disorder of checkpoints proteins and cell cycle regulation
I need help!!!!!!???
Answers
Answer:
LEARNING OBJECTIVES
Identify important checkpoints in cell division
Explain how errors in cell division are related to cancer
The length of the cell cycle is highly variable, even within the cells of a single organism. In humans, the frequency of cell turnover ranges from a few hours in early embryonic development, to an average of two to five days for epithelial cells, and to an entire human lifetime spent in G0 by specialized cells, such as cortical neurons or cardiac muscle cells. There is also variation in the time that a cell spends in each phase of the cell cycle. When fast-dividing mammalian cells are grown in culture (outside the body under optimal growing conditions), the length of the cycle is about 24 hours. In rapidly dividing human cells with a 24-hour cell cycle, the G1 phase lasts approximately nine hours, the S phase lasts 10 hours, the G2 phase lasts about four and one-half hours, and the M phase lasts approximately one-half hour. In early embryos of fruit flies, the cell cycle is completed in about eight minutes. The timing of events in the cell cycle is controlled by mechanisms that are both internal and external to the cell.
Explanation:
Regulation of the Cell Cycle by External Events
Both the initiation and inhibition of cell division are triggered by events external to the cell when it is about to begin the replication process. An event may be as simple as the death of a nearby cell or as sweeping as the release of growth-promoting hormones, such as human growth hormone (HGH). A lack of HGH can inhibit cell division, resulting in dwarfism, whereas too much HGH can result in gigantism. Crowding of cells can also inhibit cell division. Another factor that can initiate cell division is the size of the cell; as a cell grows, it becomes inefficient due to its decreasing surface-to-volume ratio. The solution to this problem is to divide.
Whatever the source of the message, the cell receives the signal, and a series of events within the cell allows it to proceed into interphase. Moving forward from this initiation point, every parameter required during each cell cycle phase must be met or the cycle cannot progress.
Regulation at Internal Checkpoints
It is essential that the daughter cells produced be exact duplicates of the parent cell. Mistakes in the duplication or distribution of the chromosomes lead to mutations that may be passed forward to every new cell produced from an abnormal cell. To prevent a compromised cell from continuing to divide, there are internal control mechanisms that operate at three main cell cycle checkpoints. A checkpoint is one of several points in the eukaryotic cell cycle at which the progression of a cell to the next stage in the cycle can be halted until conditions are favorable. These checkpoints occur near the end of G1, at the G2/M transition, and during metaphase
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5. A woman with AO blood types has children with a man with AB blood. There is a mix up at the
hospital, and the nurses aren't sure which baby belongs to which parents! The second baby in
question has a blood type of AB. Could this baby be theirs?
Yes, this baby could be theirs because there is a 25% each offspring could be AB.
No, this baby could not be theirs because there is no AB blood types in the genotypic ratio.
Answers
Answer:
Hey sorry, what was the answer to the first part (number 4?)
Explanation:
Los elefantes marinos del norte tienen poca variabilidad genética, probablemente, por un proceso que le hicieron pasar los hombres en la década de 1890. La caza hizo disminuir el censo poblacional hasta tan sólo 20 individuos a finales del siglo XIX. Desde entonces, su población ha «rebotado» hasta más de 30 000, pero sus genes todavía llevan las señales de sus aquellas generaciones su variabilidad genética es mucho menor que la de una población de elefantes marinos del sur que no sufrió una caza tan intensa. Este proceso puede denominarse como:
Seleccione una:
Cuello de botella
Especiación
Selección natural
Efecto fundadorLos elefantes marinos del norte tienen poca variabilidad genética, probablemente, por un proceso que le hicieron pasar los hombres en la década de 1890. La caza hizo disminuir el censo poblacional hasta tan sólo 20 individuos a finales del siglo XIX. Desde entonces, su población ha «rebotado» hasta más de 30 000, pero sus genes todavía llevan las señales de sus aquellas generaciones su variabilidad genética es mucho menor que la de una población de elefantes marinos del sur que no sufrió una caza tan intensa. Este proceso puede denominarse como:
Seleccione una:
Cuello de botella
Especiación
Selección natural
Efecto fundador
Answers
Answer:
elefantes marinos mmmmmmmmmm
4. Which of the following taxonomic groups would contain plants with the greatest amount of
variety and differences?
A Kingdom
B Phylum
C Order
D Family
Answers
what force does the stylet apply to the crustacean?
Answers
Answer:
Studies have shown that the discharge of toxins is associated with an extremely high pressure of 15 megapascals, whereby the stylet, a thin barb, is able to penetrate even thick crustacean shells. The stylet is accelerated at a force of 5 million g in under 700 nanoseconds, making the discharge of toxins harpoon-like
Explanation:
The stylet applies a penetrating force to the crustacean. This force is used to puncture the exoskeleton of the crustacean in order to access the soft tissues inside.
The stylet is a sharp, pointed structure that is typically found on the mouthparts of certain animals, such as insects and crustaceans. It is used for piercing and feeding on the tissues of other organisms. In the case of the crustacean, the stylet is used to penetrate the hard exoskeleton in order to access the soft tissues inside for feeding. The force applied by the stylet is typically quite strong, as it needs to be able to puncture the tough exoskeleton of the crustacean.
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Alternate forms of a gene for the same trait are called.
Answers
Answer:
Explanation:
Different versions of the same gene are called alleles. Genes can have two or more possible alleles. Individual humans have two alleles, or versions, of every gene
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Answer these questions in your own words
Why is spring in the northern hemisphere?
Why is winter in the Southern Hemisphere?
Why is summer in the northern hemisphere?
Why is autumn in the northern hemisphere?
hawaiibusgirl
Answers
Answer:
the Sun crosses the equator lineExplanation:
how is selective breeding important in agriculture? please help me!
Answers
Answer: important by bringing and growing crops that yield more, stand better, or resist pests and disease more effectively
Explanation:
Answer: Look below
Explanation: Selective breeding is important because it lets the population of that organism have a variety of offspring, increasing chances of surviving. When a person uses selective breeding, it leads them to have the ability to thrive in a sustainable production system. I hope this helped!
True or false, Water molecules tend to push away from each other.
Answers
Answer:
False
Explanation:
Water molecules actually adhere to eachother
a microbiologist does a gram stain on a csf. she sees intracellular and extracellular gram-negative diplococci. what is the most likely organism? a. n. meningitidis b. n. sicca c. n. lactamica d. neisseria gonorrhoeae
Answers
a microbiologist does a gram stain on a csf. she sees intracellular and extracellular gram-negative diplococci the most likely organism is the meningitidis.
Meningococcal disease is brought on by a bacterium known as Neisseria meningitidis. One in ten persons carry these germs in their throat and back of nose without being unwell. Being a "carrier" is what this is. Meningococcal disease is a term used to describe several ailments caused by the bacteria when they occasionally infect the body.
What brings about meningitis?
The protective membranes that shield the brain and spinal cord become inflamed and swollen during meningitis. The swelling is typically brought on by a bacterial or viral infection of the cerebrospinal fluid. However, other types of infections, tumors, certain medicines, and injuries can also result in meningitis.
Neisseria meningitidis bacteria are the cause of meningococcal illness. Meningococcal disease patients can transmit the bacterium to others through intimate personal contact, such as sharing housing or kissing.
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24. Which process in humans does not use energy released from respiration?
A cell division
B. diffusion of oxygen
C. muscle contraction
D. protein synthesis
Answers
Answer:
Muscle contraction
Explanation:
Because it will be very hard for the respiration to release through human energy
Vegetables help us have:
A restful night's sleep
Healthy skin and eyes
Indigestion
Properly working sweat glands
Answers
Answer:
healthy skin and eyes.
Explanation:
Answer:
Yes vegetables do help u with that is that the only question feel free to ask me for more questions.