n your own words, describe the production, circulation, and reabsorption of cerebrospinal fluid through (and around) the ventricular system.
Answers
Cerebrospinal fluid (CSF) is a clear, colorless fluid that is produced in the ventricles of the brain. The production of CSF begins in the choroid plexus, which is a network of capillaries in the ventricles that are covered by ependymal cells. These cells filter blood plasma and secrete CSF into the ventricles.
Once CSF is produced, it circulates through the ventricles and around the brain and spinal cord. It flows from the lateral ventricles into the third ventricle, which is connected to the fourth ventricle by a narrow passage called the cerebral aqueduct.
From the fourth ventricle, CSF can flow into the central canal of the spinal cord or exit the ventricular system through three openings called the foramina.As CSF circulates, it provides buoyancy and cushioning to the brain and spinal cord.
It also helps to remove waste products and maintain a stable environment for neuronal function.After circulating through the ventricular system and around the brain and spinal cord, CSF is reabsorbed into the bloodstream through structures called arachnoid granulations.
These structures are located in the meninges, which are the protective membranes that surround the brain and spinal cord. CSF is absorbed into the bloodstream through the arachnoid granulations and is eventually returned to the general circulation.
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Related Questions
ANSWER QUICK ILL MAKE U BRAINLIEST!!!
Answers
Answer:
1. 3.8 x 10¹⁸
2. 4 x 10¹²
3. 3.4 x 10^ -20
4. 523000000000 atoms
5. 0.00000000000000000000000000167 kg
Which of the following is true about evolution and natural selection? * (1 Point) An individual organism can develop necessary and desirable traits during its lifetime. An adaptation that helps an organism survive in one environment will always help with its survival in different times and settings. An acquired trait that an individual develops within its lifetime will be passed on to its offspring. Over time, a population changes because only the alleles of individuals who survive and reproduce are passed on to the next generations.
Answers
Evolution is the biological process through which living organisms gradually change over time, and natural selection is a mechanism for evolution. The following is true about evolution and natural selection:Over time, a population changes because only the alleles of individuals who survive and reproduce are passed on to the next generations.
In other words, natural selection favors certain traits and characteristics that allow organisms to better adapt to their environment, and these traits are passed down to future generations.An individual organism cannot develop necessary and desirable traits during its lifetime. An adaptation that helps an organism survive in one environment may not necessarily be useful in different settings.An acquired trait that an individual develops within its lifetime will not be passed on to its offspring.
Only genetic information, which is passed down through gametes during reproduction, is inherited by offspring.To summarize, natural selection is a key mechanism driving evolution, and it acts on the heritable traits of organisms, which are passed down through generations.
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When groundwater is depleted, the ground surface above can sink down over time. This is
called:
Select one:
O a. Ground Loss
O b. Subtrusion
O c. Subsidence
O d. Land Subsistence
Answers
Answer:
The answer is D
Explanation:
When groundwater is depleted, the ground surface above can sink down over time. This is called Land Subsistence. Thus, option "D" is correct.
What causes subsidence?Subsidence is a phenomenon of lowering of the ground surface due to changes in the underground support. The phenomenon occurs in several places in the world due to the
extraction of wateroiland gas from the subsoil.With this information, we can conclude that Land subsidence is related to human population growth.
Thus, option "D" is correct.
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How are molecules moving?
Answers
Answer:
Due to the closer proximity of the particles, collisions between them happen more often than in gases even if particles are moving quickly in all directions.
What is the constant variable in that? Please help!! You’ll get brainlylist..
Answers
Answer:
Zits/skin
Explanation:
a constant variable is something that stays the same throughout the process and that is the only thing that I can see that would be constant
Which action is associated with the relaxation of a circular muscle? The arm relaxes at the side The lips pucker for whistling The sphincter opening gets larger The leg bends at the knee
Answers
The action associated with the relaxation of a circular muscle is when the sphincter opening gets larger. The correct option is C.
Circular muscles, also known as sphincters, are found throughout the body and are responsible for controlling the opening and closing of various structures, such as blood vessels, digestive tract, and urinary system.
When a circular muscle relaxes, it allows for the widening or enlargement of the opening it surrounds.
For example, when the sphincter muscle in the digestive system relaxes, it opens up, allowing for the passage of food or waste material.
This relaxation and widening of the sphincter opening facilitate the movement of substances through the body. The correct option is C.
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What is the term for a female reproductive cell?
sperm
egg
tetrad
embryo
Answers
Answer:
Second choice; egg
Explanation:
Gametes are an organism's reproductive cells.
- Female gametes are called ova or egg cells
- Male gametes are called sperm
A tetrad consists of four chromatids, and a chromatid is one half of a duplicated chromosome.
An embryo is an unborn offspring (child) developing.
Answer:
Egg
Explanation:
The egg also known as ovum is the female reproductive cell.
PLEASE HELP I DONT UNDERSTAND
How does having genes on many chromosomes, rather than on just one chromosome, increase genetic variation among offspring?
Answers
Answer:
Genetic variation is increased by meiosis
Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. ... A gamete will end up with 23 chromosomes after meiosis, but independent assortment means that each gamete will have 1 of many different combinations of chromosomes
Explanation:
Due to the possibility of genetic material being recombined and shuffled during meiosis, having genes on several chromosomes as opposed to only one chromosome enhances genetic variety among kids.
What is genetic variation among offspring?At locations known as chiasma, the chromosomes overlap. The chromosomes split and reunite at each chiasma, exchanging part of their genes in the process. Genetic diversity comes from this recombination.
The chromosomes align in pairs and cross over during the meiotic process to exchange genetic material. This process results in novel gene pairings on the chromosomes, which can result in the birth of kids with distinctive combinations of features.
Therefore, the possibility of genetic material being recombined and shuffled during meiosis increases genetic variation among offspring.
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Onepage review on why understanding gas and vapors in a work setting is important and what we can do in our workplace to prevent accidents with gases and vapors.
Answers
Understanding gas and vapours in a work setting is incredibly important for workplace safety. Gas and vapours can contain noxious substances that, if exposed to, can lead to serious injury or health implications.
In order to prevent such accidents, employers must perform risk assessments in order to assess and identify any areas of risk and put in place control measures to limit them. If gas and vapours are used onsite, then suitable ventilation and extraction systems should be in place.
Employers should also ensure that their staff are aware of the potential risks associated with such substances and provide adequate training and instruction in how to work safely. Finally, employers should also check that any necessary personal protective equipment is provided and communications are in place to be able to notify relevant emergancy responders in case of an accident.
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climate change has caused the snow on mountain tops to melt earlier than normal. What negative consequences does this have?
Answers
Answer:
can create erosion and cause landslides Hope it helps
Ugget why cientit claify all dometic dog in the ame pecie even though the different breed of dog how o much radiation
Answers
among dogs, which are well known for their hybrid (or mongrel) varieties, different breeds can mate and have viable offspring, so they are all found under the umbrella of a single species, Canis familiaris
Sheepdogs and Cattle Dogs, other than Swiss Cattle Dogs (this group includes most of the dogs found classified as "herding dogs" by other kennel clubs).
Pinscher and Schnauzer, Molossoid Breeds, Swiss Mountain and Cattle Dogs and Other Breeds (the Molossian breeds include the dogs known as the mastiffs by most other kennel clubs)
Terriers
Dachshunds
Spitz and Primitive Types
Scent hounds and Related Breeds
Pointers and Setters
Retrievers, Flushing Dogs, Water Dogs
Companion and Toy Dogs
Sighthounds
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The cones of gymnosperms play the same role as ______ in angiosperms. A. flowers. B. seeds. C. leaves. D. fruit. E. roots.
Answers
The cones of gymnosperms play the same role as flowers in angiosperms.(A)
Gymnosperms and angiosperms are two major groups of seed-producing plants. Gymnosperms produce their seeds within cones, while angiosperms produce seeds enclosed in fruits, which develop from flowers. Both cones and flowers serve as reproductive structures, allowing the plants to produce seeds for propagation.
In gymnosperms, cones contain male and female reproductive organs, facilitating pollination and seed formation. Similarly, flowers in angiosperms contain male and female reproductive organs, with pollination leading to seed production within the fruits.
Therefore, cones in gymnosperms are functionally equivalent to flowers in angiosperms as they both play a vital role in plant reproduction.(A)
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which of the following are associated with mitotic division in animals (select all that apply)? question 5 options: ploidy reduction contractile ring synapsis kinetochores recombination cell plate
Answers
The mitotic division in animals is associated with ploidy reduction, contractile ring, kinetochores, and cell plate.
What is mitotic division?
The mitotic division is the process in which the mother cell divides into two identical daughter cells. It is the method used by single-celled organisms to reproduce and also by multicellular organisms to develop their somatic (non-gamete) cells, allowing them to regenerate and repair tissues that are damaged.
For the maintenance of tissue homeostasis and asexually generating new individuals, mitotic cell division is essential. The following are associated with mitotic division in animals:
Ploidy reduction: This ensures that the daughter cells that arise after division have the same chromosome count as the parent cell.
Contractile Ring: The contractile ring is another critical feature of mitotic division. This ring forms around the cell, and it is made up of actin and myosin fibers. These fibers contract to allow for the separation of the cell.
Kinetochores: The kinetochores are another essential aspect of mitotic division. They are large protein complexes that connect the chromosomes to the spindle fibers, allowing for the separation of the chromosomes.
Recombination: The recombination process also occurs during mitotic division in animals. This process allows for the exchange of genetic material between homologous chromosomes. It is essential in ensuring that the daughter cells have a unique genetic makeup.
Cell Plate: The cell plate is another critical feature of mitotic division. It is responsible for forming the cell wall between the newly formed daughter cells.
Therefore, ploidy reduction, contractile ring, kinetochores, and cell plate are all associated with mitotic division in animals.
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how have humans impacted ecosystem?
actually environmental science own words please need it now
Answers
Which body system works closely with the nervous system to regulate body activity
A. Lymphatic
B. Integumentary
C. Endocrine
D. Muscular
Answers
Answer:
d
Explanation:
d
which of the following are distributed by global ocean circulation?
a. wind and weather
b. currents and weather
c. energy and matter
d. sea life and boats
Answers
which of the following is an object used in relative dating
A-Carbon 14
B-Daughter Isotope
C-Index Fossil
D-Parent Isotope
i know for sure it’s not A
Answers
Using index fossils for age estimates of rock layers is not a new idea. For example..
1) if you have a fossil trilobite and it was found in the Wheeler Formation.
2) Ammonites were common during the Mesozoic Era. They were not found after the Cretaceous period
The object that is used in relative dating is Index Fossil. Thus, option C is correct.
What is Fossil records?
Fossil records are described as the position of found fossils all through the surface or the layers of the earth. The older the fossils are, the deeper it is found. Fossil records are also considered to be gathered information about the total number of the discovered fossils and the data obtained from them.
Fossil records are important guides to determine how life existed before. If you are to assemble a fossil, you will be able to see and tell the evolutionary changes that happened over the past years. Fossil records are evidences pointing out that life before is totally different from now.
Index fossils are fossils that are common yet were only present for a brief time. By comparing a rock layer to other rock layers, index fossils enable scientists to determine the relative age of a rock layer. Organisms that are still alive today yet have undergone little alteration over millions of years are known as living fossils.
Therefore, The object that is used in relative dating is Index Fossil. Thus, option C is correct.
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What are the outputs of the Digestive System?
Answers
Answer: Digestive processes
Digestive Processes. The processes of digestion include six activities: ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and defecation. The first of these processes, ingestion, refers to the entry of food into the alimentary canal through the mouth.
Explanation:
Answer:
Salivary glands.
Pharynx.
Esophagus.
Stomach.
Small Intestine.
Large Intestine.
Rectum.
Accessory digestive organs: liver, gallbladder, pancreas.
The stories seem as tall as the lake is deep. For hundreds of years, visitors to Scotland's Loch Ness have described seeing a `monster. Some believe it lurks in the depths of the loch, or lake.
But now the legend of "Nessie" may have no place left to hide. A New Zealand scientist is leading an international team to the lake next month. They will take samples of the murky waters and conduct DNA tests to determine what species live there.
University of Otago professor Neil Gemmell says he's no believer in Nessie, but he wants to take people on an adventure and communicate some science along the way. Besides, he says, his kids think it's one of the coolest things he's ever done.
One of the more far-fetched theories is that Nessie is a long-necked plesiosaur. Plesiosaurs were long-necked marine animals that lived during the time of dinosaurs. The theory is that the reptile somehow survived the period when all dinosaurs became extinct. Another theory is that the monster is actually a sturgeon or giant catfish. Many believe the sightings are hoaxes or can be explained by floating logs or strong winds. Gemmell said that when creatures move about in the water, they leave behind tiny fragments of DNA. It comes from their skin, feathers, scales, and urine.
He said his team will take 300 samples of water from different points around the lake and at different depths. They will filter the organic material and extract the DNA, he said, sequencing it by using technology originally created for the human genome project.
He said the DNA results will then be compared against a database of known species. He said they should have answers by the end of the year."I'm going into this thinking it's unlikely there is a monster, but I want to test that hypothesis," Gemmell said. "What we'll get is a really nice survey of the biodiversity of Loch Ness."
He said the real discoveries may come in determining things like the prevalence of invasive species.
"I hope he and his cohorts find something, although I think they'll be battling," Matheson said. "Still, it's a good way to get a trip to Scotland," Gemmell said that even if they don't find any monster DNA, it won't deter some Nessie believers. He said they've already been offering him theories, like how Nessie might be on vacation after swimming to the sea via hidden underwater caves. Another is that the creature might be extraterrestrial and not leave behind any DNA.
"In our lives, we want there still to be mysteries, some of which we will ultimately solve," Gemmell said. "That's part of the spirit of discovery. And sometimes, what you find may not be what you were expecting."
Who - New Zealand scientist
What - taking water samples
When - next month
Where - Scotland
Why - determined if the loch ness monster is real
How - testing DNA samples
Use 5 Ws and H to write a summary of the article above, including a main idea (first sentence) and at least 3 supporting details.
Answers
Neil Gemmell, a lecturer at the University of Otago, said he doesn't believe in Nessie, but he still desires to take tourists on an experience and interact with them.
Describe an adventure?A book detailing his numerous daring expeditions. the experience of risks the spirit of exploration. : a memorable or interesting experience. It could also be a daring, typically dangerous activity with a hazard of failure. Adventures might include physically risky activities like exploring, skydiving, mountain biking, river rafting, or engaging in extreme sports.
Describe a book?A collection of printed, blank, or written sheets bundled within a front and rear cover. a large printed or written literary work.: an address book Pages are the pieces of paper that make up a book. The pages contain
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Which terms best complete the chart about characteristics of human development between fertilization and birth? Stages of Human Gestation First trimester Second trimester Third trimester - Embryo develops - Organs begin to develop - (1) - Starts swallowing - Fat begins to develop - (2) - All organs are developed - Can hear and see - (3)
Answers
Answer:
Im doing the unit test and i believe the answer is C
Explanation:
It makes the most sense if you have studied.
The stages of human gestation and their time duration are given below:
First trimester: After conception to 12 weeks.Second trimester: Between 12 to 24 weeks. Third trimester: Between 24 to 40 weeks. What do you mean by Fertilization?Fertilization may be defined as a biological event that occurs by the fusion of male and female gametes successfully to produce a zygote.
The embryo develops after four to five weeks of conception which is the first trimester, organs initiate to develop by the end of the first trimester.
Swallowing is initiated at the beginning of the second trimester, and all organs are completely developed by the initiation of the third trimester. While all senses of hearing and seeing are developed by the middle of the third trimester.
Therefore, each trimester is characterized with its own functionality.
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How do amino acids move across the plasma membrane?.
Answers
Answer:
Facilitated diffusion therefore allows polar and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, to cross the plasma membrane.
Request: Please mark me as the Brainliest.
Explain the unique bonding properties of carbon.
Answers
Carbon , hence overcomes this difficulty by sharing its four valance electrons with other atoms of carbon or with atoms of other elements.
What do you mean by valence electrons?A valence electron is an electron in the outer shell associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed.
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.
For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table.
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What is a DNA
what does DNA stand for
Answers
Answer:Deoxyribonucleic acid is a molecule composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid are nucleic acids
Explanation:
Explanation:
DNA is a double helical structure with two polynucleotide chains connected by hydrogen bonds .
DNA=Deoxyribonucleic Acid
After many generations, an insect species evolved resistance to a particular pesticide. This occurred because spraying pesticides
Answers
Insects that are exposed to pesticides and survive can build up resistance to that pesticide over time. When these resistant insects mate, they pass on their genetic traits for resistance to their offspring, making the next generation more resistant to the pesticide.
The frequency of resistant individuals in the population increases each generation, and eventually, the majority of the population becomes resistant to the pesticide. This process is known as natural selection. It is important to note that not all insects will develop resistance to pesticides, and not all populations will become resistant. However, if an insecticide is used heavily and repeatedly, the likelihood of resistance developing increases. Resistance can also develop more quickly if the pesticide is not used correctly or if the insects are exposed to sub-lethal doses of the pesticide, allowing them to build up resistance without being killed.
In summary, spraying pesticides can cause natural selection to favor insects with genetic traits that make them resistant to the pesticide. Over time, the frequency of these resistant individuals in the population increases, and the population as a whole becomes more resistant.
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taxol is an anticancer drug extracted from the pacific yew tree that disrupts microtubule formation in animal cells. when taxol is added to animal cells, cell division stops. specifically, taxol must affect .
Answers
Taxol is an anticancer drug extracted from the pacific yew tree that disrupts microtubule formation in animal cells. When taxol is added to animal cells, cell division stops. Specifically, taxol must affect the fibres of the mitotic spindle.
How does tаxol аffect microtubules?Tаxol (generic nаme pаclitаxel) is one of the most importаnt аnticаncer drugs аvаilаble in the world. It is relаted to the destruction of microtubules. Tаxol stаbilizes microtubules аnd reduces their dynаmicity, promoting mitotic аrrest аnd cell deаth. Upon аssembly of the α/β-tubulin heterodimer, GTP bound to β-tubulin is hydrolyzed to GDP reаching а steаdy-stаte equilibrium between free tubulin dimers аnd microtubules. Due to this, the formаtion of mitotic spindle fibre formаtion gets аrrested аnd аs а result, the cell division come to а hold.
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what is pepsinogen and how does it helps in digestion of protein ?
Answers
Answer:
Pepsinogen is a powerful and abundant protein digestive enzyme secreted by the gastric chief cells as a proenzyme and then converted by gastric acid in the gastric lumen to the active enzyme pepsin.
Explanation:
The role of pepsin and its precursor in protein digestion was first described in the 19th century.
Answer:
i hope it is helpful .................
Are Africanized honey bees a direct or indirect threat?
Answers
Africanized honey bees are Indirect threat.
Honey bees can thrive in herbal or domesticated environments, although they choose to stay in gardens, woodlands, orchards, meadows and different regions where flowering plant life are considerable. Inside their natural habitat, honey bees construct nests inside tree cavities and underneath edges of items to cover themselves from predators.
Bees feed on nectar and pollen amassed by means of foragers — older worker bees with beefy flight muscle tissues. Some foragers gather nectar, which they store in an elastic pouch in the gut called a “honey belly”; others gather pollen grains, packing them in “baskets” on their rear legs.
Queen honey bees stay on average 1–2 years whereas employees stay on average 15–38 days within the summer and one hundred fifty–two hundred days in the iciness.
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Suppose you are caught out in the rain and get drenched and cold. As a result, your muscles start to shiver. Which part of the control system would the muscles be?
Answers
Answer:
It's controlled by the nervous system and would be the effector
Explanation:
Not sure if that's what the question is asking but there you go
Need the answer quiz please thx
Answers
Answer:
Last option D
Explanation:
It is a recessive disorder, so both alleles are needed to be affected.
It is the often the brightly colored, fragrant, and showy part of the flower that attracts the birds and insects that pollinate them and a surface for the pollinator to rest on.
Answers
Answer:
petals
Explanation:
ye