Salivary gland secretion is primarily controlled by the
A. trigeminal nerve.
B. vagus nerve.
C. facial and glossopharyngeal nerves.
D. intercostal nerves.
E. taste centers of the medulla.
Answer: C
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Which of the following statements is true of nerves?
A) They are composed of groups of neurons. B) Neurons are composed of groups of nerves. C) They act as pipes in the body, transporting fluid. D) Signals generated in nerves can travel only short distances.
Somatomedins are released from the liver in response to _______ plasma ______ levels
a. increased, growth hormone b. increased, IGF-1 c. decreased, growth hormone d. decreased, somatostatin e. increased, glucose
An IPSP is inhibitory because it
A. depolarizes the postsynaptic membrane. B. prevents Ca2+ entry into the presynaptic terminal. C. reduces the amount of neurotransmitter released by the presynaptic terminal. D. changes the threshold of the neuron. E. hyperpolarizes the postsynaptic membrane.
Contraceptive pills mimic the ________ feedback effect of ________.
A. negative; estrogens and progesterone B. positive; estrogens and progesterone C. positive; FSH and LH D. negative; FSH and LH E. negative; human chorionic gonadotropin (HCG)