Why is marijuana unlikely to interfere with breathing or heart rate?
A) Marijuana cannot cross the blood-brain barrier.
B) It is so slow acting that the brain can compensate.
C) Receptors for marijuana in those brain areas are absent.
D) Marijuana dissolves quickly and leaves the body quickly.

Question

Quizplus · Accepted Answer

Receptors for marijuana in the areas of the brain involved in breathing and heart rate (namely the brainstem) are not heavily concentrated and therefore unlikely to be affected by marijuana use.

Why Is Marijuana Unlikely to Interfere with Breathing or Heart