What Is the Purpose of Motor Nerve Varicosities as They

question 49

Multiple Choice

What is the purpose of motor nerve varicosities as they relate to smooth muscle?

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

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Definitions:

Pleurisy

An inflammation of the pleurae, which are the layers of tissue lining the lungs and inner chest wall, often causing sharp chest pain with breathing.

Pleural Cavity

The thin fluid-filled space between the two layers of the pleura surrounding the lungs, providing lubrication during respiratory movements.

Blood

A vital liquid flowing in the living organism's body that carries essential substances and removes waste.

Thyroid Cartilage

The largest cartilage in the larynx. It forms the anterior wall of the larynx.