Lecture 2- NMJ, muscle Reiser

Question 1

In the sliding filament theory, what happens to the following zones during muscle contraction?
H zone
I band
A band

Answer 1

H zone reduced
I band reduced
A band is unchanged

Question 2

the concentration of ATP inside muscle cells is buffered by…

Answer 2

Phosphocreatinine (PCr)

Question 3

3 sources of ATP production

Answer 3

1. creatine phosphate
2. glycolysis
3. oxidative phosphorylation

Question 4

5 most common factors contributing to skeletal muscle cramps

Answer 4

1. dehydration
2. pregnancy
3. drugs/toxins
4. endocrine: thyroid, adrenal insuff
5. metabolic: low Mg, Na, K, Ca, glucose