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. Homeostasis
B. Cellular organization
C. Energy utilization
D. Evolutionary adaptation
E. Sensitivity
Answer: A
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