The Purpose of Varicosities in Motor Nerve Fibers in Muscle

question 47

Multiple Choice

The purpose of varicosities in motor nerve fibers in muscle physiology is

• A)to link the thin filaments to the inside of the sarcolemma in smooth muscle.
• B)to reabsorb the decomposition products of acetylcholine after acetylcholinesterase breaks it down.
• C)to enable each cardiac myocyte to directly stimulate its neighbors.
• D)to release neurotransmitter onto smooth muscle cells.
• E)to prevent single-unit smooth muscle cells from pulling apart.

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