Which of the following is/are found in all cells of excitable and nonexcitable tissues?
a. a threshold potential
b. a resting membrane potential
c. gated ion channels
d. all of the above characteristics
e. mechanically-gated channels
D
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An electrocardiogram would be definitive for diagnosing diseases involving the valves of the heart.
Answer the following statement true (T) or false (F)
Which of the following is the most potent inhibitor (directly or indirectly) of gastric motility and emptying?
A. Gastrin B. Carbohydrate in the stomach C. Fat in the duodenum D. Distension of the stomach E. Acid in the stomach
The following list accurately represents levels of organization in the body from smallest to largest: nucleus ? chromosome ? liver cell? liver epithelial tissue ? liver? digestive system
Answer the following statement true (T) or false (F)
Acclimatization to a hot environment includes which of these physiological changes?
A. Increased volume and decreased salt concentration of sweat from the sweat glands B. Decreased volume and increased salt concentration of sweat glands C. Decreased volume and salt concentration of sweat from the sweat glands D. A decrease in the set point temperature regulated by the hypothalamus E. Increased volume and salt concentration of sweat from the sweat glands