Which of the following statements regarding the immune system is TRUE?
A)Its machinery consists of billions of red blood cells.
B)When a person is under stress,the levels of bacteria and viruses drop dramatically.
C)Lower levels of NK cells in stressful situations indicate a weakened immune system.
D)Stress increases the number of natural killer (NK)cells in the body.

Question

Quizplus · Accepted Answer

Lower levels of NK cells in stressful situations indicate a weakened immune system. This is because NK cells are a type of white blood cell that plays a critical role in fighting off viruses and tumors. When stress suppresses the production of NK cells, it can leave the body vulnerable to infection and disease.

Which of the Following Statements Regarding the Immune System Is