Which portion of a reflex arc is the only portion that is found entirely within the CNS?
A. The motor neuron
B. The receptor
C. The effector
D. The integration center
E. The sensory neuron
Answer: D
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Which of the following is arranged in correct order from the most complex to the simplest?
A) cellular, tissue, molecular, system, organ, organism B) molecular, cellular, tissue, organ, system, organism C) tissue, cellular, molecular, organ, system, organism D) organ, organism, molecular, cellular, tissue, system E) organism, system, organ, tissue, cellular, molecular
The most superior segment of the upper limb is called the ________
A) antebrachial region B) brachial region C) digits D) carpal region E) manual region
All of the following are muscles that move the eyeball EXCEPT
a) superior rectus. b) lateral rectus. c) inferior oblique. d) internal oblique. e) superior oblique.
Action potentials at a chemical synapse
A. travel from postsynaptic membrane to presynaptic terminal. B. stop at the presynaptic terminal and are blocked on the postsynaptic membrane. C. travel from presynaptic terminal to postsynaptic membrane. D. travel from presynaptic terminal to presynaptic membrane. E. travel back and forth from presynaptic terminal to postsynaptic membrane.