Which of the following is NOT a function of the epidermis?
A. Provides strength and elasticity
B. Prevents water loss
C. Protects against abrasion
D. Acts as barrier against microorganisms
Answer: A
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When there are differences between air conduction and bone conduction thresholds at the same frequencies in the same ear, we say that_________ exist.
A.) air bone gaps B.) signal to noise ratio C.) masking dilemmas D.) shearing actions
Depolarization of the ventricles is represented on an electrocardiogram by the
A) P wave. B) T wave. C) S wave. D) QRS complex. E) PR complex.
The process of phagocytosis involves the...
A) ingestion of foreign material or cell debris by leukocytes. B) shift of fluid and protein out of capillaries. C) formation of a fibrin mesh around the infected area. D) movement of erythrocytes through the capillary wall.
Answer the following statements true (T) or false (F)
1. Food is contained in the gastrointestinal tract from the time of ingestion until it is completely digested and the waste prepared for elimination. 2. The circular folds of the small intestine enhance absorption by causing the chyme to spiral, rather than to move in a straight line, as it passes through the small intestine. 3. As food passes through the digestive tract, it becomes less complex and the nutrients are more readily available to the body. 4. Some of the microbes that often invade other organs of the body are rarely found in the stomach. The reason for this is the presence of HCl. 5. Kupffer cells are found in the liver and are responsible for removing bacteria and worn-out cells.