The most common cause of hypokalemia in the United States is:
a. Poor nutritional intake
b. Renal disease
c. Use of diuretics
d. Vomiting or diarrhea
Answer: c. Use of diuretics
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A general name for a hormone that regulates mineral ion homeostasis is "tropic hormone."
Answer the following statement true (T) or false (F)
The rough endoplasmic reticulum
a. is in direct contact with certain nonmembranous organelles b. synthesizes lipids for secretion c. is called the sarcoplasmic reticulum in muscle cells d. transports proteins to its bound ribosomes e. exhibits all of the above characteristics
Helper T cells do not ________.
A. secrete inflammatory chemicals. B. secrete cytokines that stimulate clonal selection of B cells. C. secrete cytokines that stimulate clonal selection of cytotoxic T cells. D. secrete fever-producing chemicals. E. secrete cytokines that stimulate macrophage activity.
All of the following are functions of mucus and mucous membranes except which one?
A. Trap microbes. B. Destroy pathogens. C. Initiate tissue repair. D. Inhibit pathogens from progressing.