The esophagus
A) is reinforced by cartilaginous structures.
B) is a hollow muscular tube that connects the pharynx to the stomach.
C) is under both voluntary and autonomic nervous control.
D) always remains open.
E) All of the answers are correct.
B) is a hollow muscular tube that connects the pharynx to the stomach.
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Which of the following is NOT a determinant of whole-muscle tension?
A. The numbers of motor units recruited B. The tension produced by each contracting fiber C. The number of muscle fibers contracting D. The proportion of the muscle fibers within each motor unit that are contracting at any given time E. The frequency of motor neuron stimulation
Which of the following would be an adequate stimulus for a mechanoreceptor?
A) pH B) cell stretch C) oxygen D) photon of light E) cold temperature
The testes are located outside the abdomen because spermatogenesis requires a temperature lower than core body temperature
Indicate whether the statement is true or false.
The greater the compliance the
A. more easily the vessel wall stretches. B. higher the blood pressure will be. C. longer the blood vessel will measure. D. less the elasticity of the vessel. E. greater the resistance generated in the vessel.