Which describes the effect of prolonged stress on the body’s ability to fight disease? 1. it strengthens the immune system. 2.it weakens the immune system. 3. it has no effect. 4. it with fighting colds.

Which of the following events will occur when you stab yourself with a dirty nail? (select all that apply.) a. attraction of neutrophils to the wound. b. local secretion of cytokines. c. activation of the complement pathway. d. vasoconstriction of local capillaries to confine the bacteria.

Which of the following is a nonspecific defense against pathogens? - b cells - antibodies - t-cells - inflammation

What should you not do when doing abdominal workouts? a. keep your chin off your chest b. keep your head aligned with the spine c. put pressure on your neck d. all of the above