If a person loses a large amount of water in a short period of time, he or she may die from dehydration. Antidiuretic hormone (ADH) can help reduce water loss through its interaction with its target cells in the _____
A) anterior pituitary
B) posterior pituitary
C) bladder
D) kidney
D
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Which organ system includes the spleen, lymph nodes, and thymus?
a. circulatory system b. endocrine system c. nervous system d. digestive system e. lymphatic system
Viruses:
a. Consist of only a single cell b. Are smaller than cells c. Consist of multiple cells d. Contain a nucleus e. Contain ribosomes
The process of filtration in the glomerulus is driven by
a. active transport. b. blood pressure. c. osmosis. d. dialysis. e. sodium-potassium pumps.
Which of the following statements about molecular switches is false?
(a) Phosphatases remove the phosphate from GTP on GTP-binding proteins, turning them off. (b) Protein kinases transfer the terminal phosphate from ATP onto a protein. (c) Serine/threonine kinases are the most common types of protein kinase. (d) A GTP-binding protein exchanges its bound GDP for GTP to become activated.