A nerve impulse travels fastest along ________ axons of ______ diameter
A. myelinated, small
B. unmyelinated, small
C. myelinated, large
D. unmyelinated, large
C
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Which is TRUE about reflexes initiated by muscle spindle activation?A) They have a monosynaptic component.B) They result in activation of gamma motor neurons.C) They result in activation of extrafusal muscle fibers.D) The "knee-jerk" reflex is an example.E) They inhibit the activation of muscles that are stretched.
What will be an ideal response?
During muscle contraction, myosin cross bridges attach to which active sites?
A) myosin filaments B) actin filaments C) Z discs D) thick filaments
A health care student is planning to get the hepatitis B series of injections. She has never had this vaccine before. How many injections should she anticipate receiving??
A) ?There is no series, only a booster is needed. B) ?Two C) ?Three D) ?Four
After ovulation, the oocyte
A. releases negative ions that create an electrical gradient that all sperm swim toward. B. releases chemotaxic signals to attract sperm to its location. C. propels itself toward seminal fluid by calcium-dependent kinesis. D. waits passively for a sperm to penetrate.