What is the role of calcium in skeletal muscle?
A) binding with the troponin to remove contraction inhibition
B) forming hydroxyapatite crystals
C) re-establishing glycogen stores
D) None of the listed responses is correct.
A
Explanation:
B) Calcium does not form hydroxyapatite crystals in muscle.
C) Calcium does not re-establish glycogen stores in muscle.
D) One of the listed answers is correct.
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The acrosome of the sperm cell:
a. contains enzymes that help break down the covering of the ovum b. contains mitochondria c. produces ATP for sperm cell mobility d. is a whip-like structure that provides movement for the sperm
Exposure of the skin to sunlight converts ________ to vitamin D3.
A) calcium B) calcitriol C) 7-dehydrocholesterol D) cholesterol E) 25-OH D3
What can occur from a deficiency of vitamin C?
a. Scurvy. b. Night blindness. c. Nerve problems. d. Pernicious anemia.
During inhalation/inspiration, the diaphragm contracts and the alveolar pressure is less than atmospheric pressure; during exhalation/expiration, the diaphragm relaxes and the alveolar pressure is greater than atmospheric pressure
Indicate whether the statement is true or false.