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 .
Expression can be influenced by factors that are not genetic.
<h3>What are non-genetic factors?</h3>
Factors that are not part of a person's genetic make-up are referred to as non-genetic factors. These elements include aspects of the surrounding environment as well as aspects of an organism's lifestyle that contribute to its makeup.
It has been demonstrated in a number of studies that the formation of some features is influenced by both hereditary and non-genetic variables.
In the situation described above, both of the monozygotic twins have diabetes, but the lifestyle choices made by one of them causes the condition to manifest itself seventy percent of the time. It's possible that the person is drinking more alcohol and eating more sugar.
Learn more about genetics, here:
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Answer:
Option B.
Explanation:
Cystic fibrosis is caused by a defective gene which causes the lungs and the digestive system to become clogged with sticky mucus resulting the inflammation of the lungs thereby causing difficulty in breathing.
