Acetylcholine binds to ________ receptors of the heart and causes the opening of ________ channels.
A. muscarinic; Na+
B. muscarinic; K+
C. nicotinic; K+
D. nicotinic; Na+
Answer: B
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An immovable joint is a(n)
A) synarthrosis. B) diarthrosis. C) amphiarthrosis. D) syndesmosis. E) symphysis.
The ________ division tends to prepare the body for action.
A. sensory afferent B. somatic motor C. parasympathetic D. sympathetic E. motor afferent
What will happen if a normal cell is placed in a hypotonic solution?
A. It will swell in size. B. It will shrink in size. C. It will stay the same size. D. The result can't be predicted.
In an isotonic contraction,
A) muscle tension exceeds the load and the muscle lifts the load. B) tension rises and falls but the muscle length is constant. C) the peak tension is less than the load. D) many twitches always fuse into one. E) postural muscles stabilize the vertebrae.