"Diver's reflex" is a response to diving in many aquatic mammals and also occurs in humans upon submersion in water. It is characterized by physiological changes that decrease oxygen consumption, such as a slowed heart rate. Which region of the heart would be directly affected by the nervous system to allow for the slowing of heart rate?

Question

Quizplus · Accepted Answer

The SA node, or sinoatrial node, is the heart's natural pacemaker and is directly affected by the nervous system to control the heart rate. When the diver's reflex is triggered, the parasympathetic nervous system slows the heart rate by acting on the SA node.

"Diver's Reflex" Is a Response to Diving in Many Aquatic