Which statement best describes the effects that stress has on the immune system? a. stress can lead to increased vulnerability to infections and immune deficiency disorders. b. stress can lead to decreased infections and immune deficiency disorders. c. stress can inhibit the production of red blood cells and platelets. d. stress can decrease the likelihood of catching colds, flu, and pneumonia.

A. Stress can lead to increased vulnerability to infections and immune deficiency disorders.

Explanation:

Stress is a natural reaction of the body, a preparation of the individual for a situation of struggle and confrontation. The body has resources that make it more alert, and this is usually done by releasing hormones that go to the brain, the muscles, and the blood pressure. Once this condition is over, the hormones fall, and the person returns to normal. The problem is when stress starts to be constant and for everyday reasons, because it can result in increased vulnerability to infections and immunodeficiency disorders.