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slega [8]
3 years ago
14

Why do the different skeletal muscle fiber types vary in the speed and duration of their twitches?

Medicine
1 answer:
IrinaVladis [17]3 years ago
5 0

Answer:

The different skeletal muscle fiber types vary in the speed and duration of their twitches due to -

b) They vary in the rate of hydrolysis of ATP

c) They vary in the removal of Ca+ from the cytosol

Explanation:

There are mainly two types of muscle fibers , i.e.

a) slow twitching, long contraction duration( type I fibers)

b) First twitching but short duration of contraction. ( type II fibers).

Now think of the physiology of muscle. Two components are important, cytosolic Ca++ concentration and Availability of ATP. K+ is related to the action potential ( none or all law, there is no relation to the duration with respect to the potassium). For long contraction muscle fibers need a more steady supply of ATP, and also consistent high concentration of cytosolic Ca++ for muscle contraction to happen. So, these two factor is important for the duration of twitching. So the answer is option f .

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The complete question is:

Which therapeutic system is based on the administration of extremely diluted doses of natural agents that produce symptoms in large doses but are believed to produce a cure when given in minute doses?

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7 0
2 years ago
What are the female gonads called?
Alchen [17]

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Female gonads are the reproductive organs in female. These are the ovaries. Their are two ovaries in a human female which produces and stores numerous ovules or egg cells within them. The egg is released at the time of fertilization in the fallopian tube reaches upto the uterus. At the uterus the fertilization process takes place in which the sperm from male partner fuses with the egg of the female. This process results in formation of zygote which is a precursor of new life.  

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