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Vanyuwa [196]
3 years ago
10

What acts as a cushion between your brain and your skull?

Biology
1 answer:
WARRIOR [948]3 years ago
5 0
<span>Brain is protected by bony skull and a liquid called the spinal fluid. The fluid acts as a cushion between brain and skull. It is a clear, colorless body fluid found in the brain and spinal cord. it is produced in the choroid plexuses of the ventricles of the brain, and absorbed in the arachnoid granulations.The spinal fluid occupies the subarachnoid space (between the arachnoid mater and the pia meter) and the ventricular system around and inside the brain and spinal cord.</span>
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A second action potential cannot be generated until ________.
Bingel [31]

Answer:

"Action potential is a rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane with a characteristic pattern."

It is the mode through which a neuron transports electrical signals.

Explanation:

  • Option - (a) is the best choice to choose from,
  • <u>The refractory period :</u>

A second action potential cannot occur until the membrane has recovered or reestablished, this is the refractory period. The absolute refractory period coincides with inactivation of voltage-gated sodium channels which makes it impossible to generate another nerve impulse.

5 0
3 years ago
what is a unit of energy that describes how much energy the body can get from eating or drinking certain foods
Nonamiya [84]

Answer:

Calorie

Explanation:

3 0
2 years ago
Briefly outline the steps involved in glycogen synthesis and breakdown and explain the regulatory mechanism involved in glycogen
Elenna [48]

Answer:

Glycogen is synthesized and degraded by different pathways, which provide greater flexibility for energy production through its degradation or for storage in its synthesis and thus maintain control of both metabolic pathways.

Explanation:

Synthesis and degradation pathways:

1º.- activation of glucose units at UDP-glucose.

UDP-glucose is an activated form of glucose, which is formed in a reaction catalyzed by UDP-glucose, which is formed in a reaction catalyzed by UDP-glucose pyrophosphorylase. This reaction is an example of biosynthetic reactions that are directed by the hydrolysis of pyrophosphate (PPi-2Pi).

Many biosynthetic reactions are directed by the hydrolysis of pyrophosphate, which catalyzes pyrophosphate hydrolase or pyrophosphatase, and is very favorable thermodynamically.

2nd.- polymerization or addition of glucose units to glycogen. Two steps: addition and branching.

 UDP-glucose acts as the giver of glucose units for glycogen synthesis. Glucose transfer

from the UDP-glucose to a growing glycogen chain is catalyzed by glycogen synthase.

A branching enzyme [amyl (1,4 -> 1,6) -transglucosidase], moves a chain of about seven glucose residues, to form

bonds (α1-> 6) at the branching points.

To start glycogen synthesis, glycogen synthase is only effective when it is linked to glycogenin. Glycogenin is

an oligosaccharide carrier protein formed by glucose units with linkages (α1-> 4).

6 0
3 years ago
A.Which substances are reactants in photosynthesis? ____________ ____________
Nonamiya [84]

The answer to this question - D

6 0
3 years ago
Read 2 more answers
I heard that mitochondria increase if we exercising. So, if i was exercising and suddenly stop exercising. Will the number of mi
Mariulka [41]

Answer:

I believe the amount of mitochondria in our body only increases after long term exercising.

When you are exercising, you do not produce more mitochondria straight away. Even after you stop, the amount of mitochondria will be the same.

I believe the production of mitochondria and the improvement of your muscles is the same. You need to exercise for awhile before you can get more mitochondria in your body.

As for your amount of food needed, it is not according to the amount of mitochondria you have. It is according to how much energy you need.

You should be able to tell how much food you need. So, you actually wont produce more fats. As long as you eat the correct and moderate amount of food.

You will not produce more fat when you stop exercising than when you never exercise. Like I said, the amount of fat produced is according to your food intake. Your food intake is according to your energy needs. As long as you eat moderately, you will not produce more fat. In fact, you will be able to burn fats better after long term exercise because your body will be healthier and able to moderate itself.

5 0
3 years ago
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