Which of the following statements is false?
A. Peptide hormones act on time scales of
days to months.
B. Amine hormones are more abundant than
steroid hormones.
C. Peptide hormones can evolve through
changes in their amino acid sequence.
D. Peptide hormones and amine hormones
are both derived from amino acids.
E. Steroid hormones are hydrophobic,
whereas amine hormones are hydrophilic.
A
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What will be an ideal response?
Some insecticides interfere with the removal of acetylcholine from the synaptic cleft. What effect will this have on muscle contraction?
A) The muscle cell will lose all of its supply of calcium. B) The muscle cell will be unable to be stimulated again. C) The muscle cell will be in a state of constant stimulation, leading to a tetany response. D) The muscle cell will have a single twitch and will be unable to contract again.
A concentration gradient is an example of
A. oxidation-reduction. B. potential energy. C. entropy. D. hydrolysis.
_______ tissue heals rapidly, compared to other tissue types.
Fill in the blank(s) with the appropriate word(s).