Refer to the paragraph above on the venom of marine core snails. This particular conotoxin inhibits acetylcholine receptors that are located _____
A) along the motor neuron axon
B) on motor neuron dendrites
C) on the presynaptic membrane of the neuromuscular junction
D) on the postsynaptic membrane, on the muscle cell
D
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Select the correct pair of statements about FSH and LH function.
A. In males, FSH stimulates spermatogenesis and LH stimulates Leydig cells to secrete testosterone. In females, FSH stimulates growth of follicles and LH stimulates ovulation and development of the corpus luteum. B. In males, FSH stimulates spermatogenesis and LH stimulates Leydig cells to secrete testosterone. In females, FSH stimulates ovulation and development of the corpus luteum and LH stimulates growth of follicles. C. In males, FSH stimulates Leydig cells to secrete testosterone and LH stimulates spermatogenesis. In females, FSH stimulates growth of follicles and LH stimulates ovulation and development of the corpus luteum. D. In males, FSH stimulates Leydig cells to secrete testosterone and LH stimulates spermatogenesis. In females, FSH stimulates ovulation and development of the corpus luteum and LH stimulates growth of follicles.
In DNA, cytosine bonds to guanine. In RNA, cytosine bonds to
a. thymine. b. cytosine. c. uracil. d. guanine. e. adenine.
Various forms of a gene at a given locus are called
a. chiasmata. b. alleles. c. autosomes. d. loci. e. chromatids.
An organ represents a higher level of structure than the tissues composing it, and it performs functions that the tissues cannot perform alone. This is an example of the principle of
A) structural adaptations. B) cellular regulation. C) emergent properties. D) biotechnology.