Which statement accurately describes the function of a hormone produced by the adrenal glands?
a. cortisol causes the heart rate and blood pressure to rise.
b. norepinephrine regulates blood volume and pressure.
c. epinephrine widens the air passageways in the lungs.
d. aldosterone control metabolism of carbohydrates, fats, and proteins.

Answer is c. Epinephrine widens the air passageways in the lungs.

A pair of adrenal or suprarenal glands are the endocrine glands which are located on the top of the kidneys. Adrenal glands are covered by a connective tissue capsule. They produce a variety of hormones including epinephrine (adrenaline) and the steroids aldosterone and cortisol.  

Epinephrine or adrenaline is secreted when a person is under a threat or stress. This hormone quickly responds to stress by widens the air passageways in the lungs. The lungs contain smooth muscle and epinephrine causes smooth muscles to relax. As a result the bronchioles widens that increases the breathing and enhances cellular respiration.

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