Which of the following statements is true of the immune system and stress?
A) NK cells are a type of white blood cell that is more likely to be present in high-stress circumstances.
B) Higher levels of NK cells in stressful situations indicate a weakened immune system.
C) Immune system functioning increases with normal aging.
D) Aerobic fitness is related to the presence of a lower level of senescent T cells.

Question

Quizplus · Accepted Answer

Aerobic fitness is associated with a healthier immune system, including a lower level of senescent T cells, which are aged and less effective.

Which of the Following Statements Is True of the Immune