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What glial cell is responsible for the blood-brain barrier?
Astrocytes are the glial cells responsible for maintaining the blood-brain barrier in the central nervous system. They help regulate the exchange of substances between the blood and the brain to protect the brain from harmful agents while allowing essential nutrients to pass through.
How do substances layer?
Substances layer based on their density. The denser substances will sink to the bottom while the less dense substances will float on top. This separation occurs due to differences in the weight and mass of the substances.
Why does the blood leaving most organs in the brain have less oxygen than when it entered the brain?
The brain is generally considered one organ, and yes blood delivers oxygen to the brain, so when the blood leaves the brain, it is oxygen depleted. This oxygen fuels the brain through respiration, which gives it the energy to keep you alive and constantly keep your bodily functions in line. There is a blood brain barrier though, so blood never actually enters the brain and oxygen diffuses over this barrier.
Why do substances dissolve less in salt water than in fresh water?
because the interparticle spaces were filled by salt
What is the processby which substances move from areas of higher concentrationto areas of lower concentration?
More concentrated to less concentrated
How can inflammation of the brain cause the blood-brain barrier to malfunction?
Inflammation may cause the blood-brain barrier to become less effective at preventing the passage of toxic substances into brain tissue.
What substances is less dense than air?
Plasma.
Density of an object is less than density of water?
It is for some substances and not for other substances.
What is the more convolutions that are found in the brain of an animal?
the less healthy the brain
Is the X-ray machine at an airport checking the physical or the chemical properties of the substances in your luggage?
The X-ray machine at an airport is checking the physical properties of the substances in your luggage, such as their shape, density, and structure. It is not able to assess the chemical properties of the substances.
True or false Substances whose pH is less than 7 are acidic?
True. Substances with a pH less than 7 are considered acidic.
It's said that the brain thinks and controls everything but why can many people with the disease 'water on the brain' think and act normally?
Hydrocephalus, which means "water on the brain" is the brain's inability to let its fluid (cerebrospinal fluid) drain. The fluid builds up and gets in the way of developing brain tissue that needs that space. We now know that the brain is much more "plastic" (flexible, changeable) than was once thought. Although there is less (sometimes much less) brain tissue in people with this disease, many are able to maintain normal brain function. This is because other areas of the brain are recruited (basically "taken over") to do the functions of the missing or smaller areas.
What glial cell is responsible for the blood-brain barrier?
Astrocytes are the glial cells responsible for maintaining the blood-brain barrier in the central nervous system. They help regulate the exchange of substances between the blood and the brain to protect the brain from harmful agents while allowing essential nutrients to pass through.
What is the difference between brain and computer?
computer's can store more information. brain store's less
How do you label the substances in order by density in a test tube?
If the substances in question remain in the form of separate layers, rather than dissolving into each other, then the densest one will be on the bottom, and with progressive height in the test tube, you will get progressively less density. Denser substances will fall through less dense substances.
What does your brain look like when you smoke a lot?
Smoking may not affect the APPEARANCE of the brain much at all, but it will affect how much oxygen reaches the brain. So the brain will become less healthy and work less efficiently over time due to lack of oxygen.
What things does brain doesnt know?
The brain knows everything about nothing only if it can be less of not knowing of what not to know.
