The first place in which mechanical processing of food takes place is the
A) oral cavity.
B) esophagus.
C) stomach.
D) large intestine.
E) small intestine.
A) oral cavity.
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Which of the following is not a mechanism for the development of autoimmune disorders?
A) exposure of previously "hidden" self-antigens to the adaptive immune system B) a second exposure to an allergen C) mutation followed by the appearance of membrane proteins not previously present D) cross-reaction of antibodies formed against foreign antigens with self-antigens
In a muscle fiber undergoing maximal tetanic stimulation, the velocity of shortening ____ as the load ____
a. decreases; decreases b. decreases; increases c. increases; increases d. remains constant; increases e. remains constant; decreases
The cuticle around a nail is the:
A) lunula. B) hyponychium. C) eponychium. D) perionychium.
What is the purpose of mastication?
A) to eliminate undigested food wastes from the body B) to propel food from one digestive organ to the next C) to transport nutrients into the blood and lymph D) to chew, grind and tear food into smaller pieces while in the mouth E) to move food back and forth along the walls of the small intestine