Which of the following ions is essential to muscle contraction?
A) acetylcholine
B) sulfate
C) calcium
D) sodium
E) chloride
C) calcium
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When proteins undergo deamination, the waste substance found in the urine is mostly________.
A) urea B) ammonia C) acetyl CoA D) ketone bodies
Which of the following is NOT a form of hemoglobin found in the developing human?
A. Fetal B. Embryonic C. Adult D. Adolescent
The most common form of color blindness is related to a recessive mutation on the X chromosome and is more common in ________; as a result, a pigment normally found in ________ is missing.
A. men; rods B. men; cones C. women; rods D. women; cones
After consuming a carbohydrate rich meal, insulin is released by the pancreas to lower serum glucose levels. when serum glucose levels have returned to normal the secretion of insulin is inhibited. this is an example of which feedback mechanism?
a) positive feedback inhibition b) neutral feedback inhibition c) negative feedback inhibition d) parallel after discharge inhibition