Sperm movement through the uterus and uterine tubes is aided by muscle contractions of the uterine walls and ________ in the semen.
A. estrogen
B. epinephrine
C. prostaglandins
D. progestins
Answer: C
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What is the advantage of transmitting information by an electrical synapse?
A) Hormone free B) Chemical free C) Fast recovery D) Less toxicity
A postsynaptic neuron responds to neurotransmitters released by a presynaptic neuron by creating
a) EPSPs b) water-filled channels in its membrane c) IPSPs d) either EPSPs or IPSPs e) All the choices are correct
Which of the following hormones is responsible for the development and maintenance of the secondary sexual characteristics?
a. testosterone b. estrogen c. progesterone d. Both a and b e. All of the above
Changes called male climacteric are a consequence of a(n) ________.
A. decreased secretion of testosterone B. increased secretion of progesterone C. increased secretion of estrogens D. increased secretion of FSH and LH E. increased secretion of GnRH