A condition in which T cells and B cells are unable to distinguish between the body's own tissue and something foreign and then attack the tissue is called a(n):

Following are overloading factors of the rectus femoris EXCEPT:

a. Prolonged immobilization of the thigh b. Prolonged compression of the muscle belly c. Indirect injury to the muscle belly d. Tripping, falling, or bruising

Which of the following FEV1 values indicates severe compromise of expiratory airflow that may contraindicate the use of mucoactive therapy?

a. Less than 65% b. Less than 55% c. Less than 35% d. Less than 25%