What is the function of histamine?
A. It is a chemical that kills bacteria.
B. It is an anticoagulant that inhibits blood clotting.
C. It is a clotting factor.
D. It is a vasodilator that speeds blood flow to injured tissues.
E. It is a signal to B cells to produce antibodies.
D. It is a vasodilator that speeds blood flow to injured tissues.
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Which of the following is an example of a flat bone?
Which of the following is an example of a flat bone? A. talus B. maxilla C. radius D. scapula
Maintaining the proper acid-base balance of the blood is carried out by which body system?
A. Skeletal B. Respiratory C. Musculoskeletal D. Integumentary
Which of the following occurs during rapid eye movement (REM) sleep?
A. A person begins to relax and feels drowsy. B. A person falls into light sleep. C. The muscles are paralyzed, and body temperature, blood pressure, and heart rate and respiratory rate increase. D. The muscles relax, and body temperature, blood pressure, heart rate, and respiratory rate fall. E. The muscles are very relaxed and body temperature, blood pressure, and heart rate, and respiratory rate are at their lowest levels.
Because of the great deal of active transport that occurs here, the ________ of one's nephrons collectively account for about 6% of one's daily resting ATP and caloric consumption.
A. glomeruli B. collecting ducts C. distal convoluted tubules D. loops of Henle E. proximal convoluted tubules