During pregnancy, the mother's
A. cardiac output and hematocrit rise.
B. cardiac output and hematocrit fall.
C. cardiac output rises and hematocrit falls.
D. cardiac output falls and hematocrit rises.
C
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Transmission of nerve impulses along myelinated axons requires more energy than transmission along unmyelinated axons
Indicate whether this statement is true or false.
The major resistance vessels of the body are the
a. arteries. b. arterioles. c. capillaries. d. lymphatics. e. veins.
A nerve ________
A) consists of axons wrapped in connective tissue in the PNS B) consists of entire neurons — dendrites, cell bodies, and axons C) is found only in the CNS
In neurophysiology, the term "summation" refers to the addition of
A. excitatory neurotransmitter molecules at a receptor. B. action potentials at the node of Ranvier. C. postsynaptic potentials at the initial segment. D. presynaptic hyperpolarizations. E. resting membrane potentials in a particular area of the brain.