Which of the following statements is not true regarding the movement of blood through capillary beds?
A) Cold temperatures will cause the opening of sphincters to capillary beds in the skin.
B) Eating will cause the opening of sphincters to capillary beds in the digestive tract.
C) Exercise will cause the opening of sphincters to capillary beds in skeletal muscles.
D) When the sphincters leading to a capillary bed are closed, the blood passes through a shunt.
E) Red blood cells move through the capillaries in single file.

Question

Quizplus · Accepted Answer

Capillaries are microscopic blood vessels; across its walls, nutrients, wastes, and gases are exchanged. Red blood cells move through them in single file. When the tissues are served by a particular capillary bed, sphincters leading to that tissue are shut so that the blood passes through a single capillary called a shunt. When the tissue is active exerting a muscle, food in the digestive tract), the sphincters relax and blood fills the capillary bed. Sphincters leading to capillary beds are controlled based on body temperature. If the body is hot, the sphincters are relaxed so that heat can radiate; if the body is cold, the sphincters are constricted to avoid the loss of heat.

Which of the Following Statements Is Not True Regarding the Movement