What causes a stomach ulcer?
A. Consuming too many calories
B. Lack of a key nutrient
C. A bacterial infection
D. Chronic consumption of spicy food
Answer: C
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Osmometer cells in the brain sense an increase in the salt concentration of plasma. This information is sent to the hypothalamus, which notifies the pituitary gland to release the hormone, ADH. ADH causes the kidney to save water, which lowers the salt concentration of the plasma. What characteristic of life does this overall pathway represent?
A. Sensitivity B. Energy utilization C. Cellular organization D. Homeostasis E. Evolutionary adaptation
Swarmer cells are
A. formed by Myxobacteria. B. formed by sheathed bacteria. C. also known as coliforms. D. part of the green nonsulfur bacteria.
CD8 cells are
A. T helper cells. B. natural killer cells. C. T cytotoxic cells. D. macrophages.
If the set point of the hypothalamus were to suddenly rise to 40°C (as in the induction phase of a fever), what would the initial response of the body be?
A. glands release sweat B. muscles contract to cause shivering C. nothing D. body temperature drops E. blood vessels dilate