Secretions of the Leydig cells eventually pass into
the
a. semen.
b. vagina.
c. blood.
d. semen and vagina.
e. semen, vagina, and blood.
Answer: c
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The activity of acetylcholine in a synapse is terminated by its_____
A) active transport across the presynaptic membrane B) diffusion across the presynaptic membrane C) active transport across the postsynaptic membrane D) diffusion across the postsynaptic membrane E) degradation on the postsynaptic membrane
Body cells of human males contain
a. one X chromosome and one Y chromosome. b. two X chromosomes. c. two Y chromosomes. d. two O chromosomes. e. chromosomes X, Y, and O.
Proteins made on ribosomes may be further modified within which organelle?
a. nucleus. b. lysosomes. c. mitochondria. d. Golgi complex. e. peroxisomes
Giant kelp is a type of ________ algae.
Fill in the blank(s) with the appropriate word(s).