Target cells can become more sensitive to a hormone by increasing the number of receptors via which process?
a) lateral-regulation
b) up-regulation
c) down-regulation
Answer: b) up-regulation
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Which one of the following would indicate the typical primary stressing of the word "umbrella"?
a) [?m.'br?. l?] b) [?m.br?. 'l? ] c) [ ' ?m.br? .l? ]
When more action potentials arrive at the axon terminal, how is the postsynaptic cell affected?
A) Neurotransmitter release does not change, but voltages applied to the postsynaptic cell increase. B) Neurotransmitter release increases, thereby increasing the frequency or magnitude of graded potentials in the postsynaptic cell. C) Neurotransmitter release does not change, thus the postsynaptic cell behaves the same way it always behaves. D) Neurotransmitter release increases, but does not change the graded potentials that follow.
Lymphatic tissue associated with body passages that are open to the exterior are called MALT for __________ associated lymphatic tissue.
Fill in the blank(s) with the appropriate word(s).
Funny channels control which of the following currents?
a. inward sodium b. outward sodium c. inward potassium d. outward potassium e. inward calcium