The innermost layer of the retina ________
A) is a blood-rich nutritive region containing a dark pigment
B) is a pigmented epithelium
C) is a transparent neural layer
D) is composed of fibrous tissue
Answer: C
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The main way acetylcholine is cleared from a synapse is by
A. reuptake by the presynaptic cell. B. being engulfed by a supporting glial cell. C. uptake by the postsynaptic cell. D. degradation by an enzyme.
The cells that are primarily responsible for immunity are
A) neutrophils and lymphocytes. B) monocytes and macrophages. C) lymphocytes and macrophages. D) lymphocytes and monocytes.
The portion of the nervous system that has voluntary control over skeletal muscles is the ________ division.
A. autonomic motor B. somatic motor C. somatic sensory D. visceral sensory
Motor neurons of the autonomic nervous system
A. always excite effector organs. B. always inhibit effector organs. C. do not excite effector organs but monitor their status of activity. D. can either excite or inhibit effector organs.