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


Answer: D

Anatomy & Physiology

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Where would you NOT find a cholinergeric nicotinic receptor?

A) all postganglionic neurons (cell bodies and dendrites) B) adrenal medulla hormone producing cells C) sarcolemma of skeletal muscle cells at neuromuscular junctions D) all parasympathetic target organs

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A decrease in the surface area of the respiratory membrane will cause the diffusion rate to ________.

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