Stretch reflexes:
A. occur only in the legs.
B. inhibit antagonistic muscles.
C. mediate flexor activation and withdrawal from a painful stimulus.
D. are initiated by stimulation of Golgi tendon organs.
E. are initiated by stretching of extrafusal muscle fibers.
B
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Arrange these structures as they participate in excitation-contraction.
A. Sarcolemma, sarcoplasmic reticulum, Ca2+, T tubules B. Ca2+, T tubules, sarcolemma, sarcoplasmic reticulum C. T tubules, sarcolemma, Ca2+, sarcoplasmic reticulum D. Sarcolemma, T tubules, sarcoplasmic reticulum, Ca2+ E. Sarcoplasmic reticulum, Ca2+, T tubules, sarcolemma
How does the sympathetic nervous system decrease glomerular filtration rate?
A) stimulates relaxation of the mesangial cells B) stimulates constriction of both the afferent and efferent arterioles C) stimulates constriction of the efferent arteriole only D) stimulates constriction of the afferent arteriole only E) stimulates contraction of mesangial cells
The ____________________ adrenal gland is typically seen at a lower level on sectional images.
Fill in the blank(s) with the appropriate word(s).
Which plane is frontal?
a) A b) B c) C d) D e) E