The neurotransmitter that controls skeletal muscle contraction is
A. beta endorphin.
B. GABA.
C. acetylcholine.
D. nitric oxide.
Answer: C
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Which is NOT true about cofactors involved in enzymatic reactions?
A. They may alter the conformation of the enzyme. B. Only a small number of cofactor molecules may be needed to maintain enzyme activity. C. They may be a metal such as iron. D. There must be equal quantities of enzyme and cofactor molecules for a reaction to proceed. E. They may be a substrate in a catalyzed reaction.
The hollow cavity within the blastocyst is the
A) blastula. B) gastrula. C) blastocoele. D) trophoblast. E) ootid.
Which area of the myogram shows sustained contraction with partial relaxation?
a) A b) B c) C d) D e) none of these choices
The left side of the heart pumps the same volume of blood as the right
Indicate whether the statement is true or false