Constriction of Smooth Muscle in the Bronchioles

question 63

Multiple Choice

Constriction of smooth muscle in the bronchioles

• A) occurs during periods of exercise.
• B) restricts the flow of air into the lungs.
• C) decreases ciliary action.
• D) increases airflow out of the lungs.
• E) does not affect airflow.

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Definitions:

Iris

Muscular ring that surrounds the pupil and regulates the passage of light through this opening.

Pupil

Opening in the center of the iris of the vertebrate eye.

Retina

The light-sensitive layer of tissue at the back of the inner eye, which converts light images into electrical signals sent to the brain.

Lens

An optical device capable of converging or diverging light, or a transparent structure in the eye which focuses light onto the retina to facilitate vision.