The "dive reflex" causes which of the following physiological responses when most of the body is immersed in water?

Question

Quizplus · Accepted Answer

The dive reflex is a physiological response that occurs when a person's face or body is submerged in water. The reflex causes a decrease in heart rate, peripheral vasoconstriction (narrowing of the blood vessels), and shunting of blood to vital organs, such as the heart and brain, in order to conserve oxygen and avoid oxygen deprivation. These responses help increase the amount of time a person can spend underwater. Therefore, choice C is the correct answer. Choices A and D are incorrect because the dive reflex actually causes a decrease in heart rate and an increase in blood flow to the brain. Choice B is incorrect because the dive reflex causes peripheral vasoconstriction, not vasodilation.

The "Dive Reflex" Causes Which of the Following Physiological Responses