The pulmonary trunk emerges from the ________ of the heart.
A. left ventricle
B. right atrium
C. apex
D. right ventricle
E. left atrium
Answer: D
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Which is true regarding pyrogens?
A) They can reset the temperature-regulating center in the hypothalamus and raise the body temperature. B) They break down tissue by autolysis, releasing digestive enzymes that first destroy the injured cells and then attack surrounding tissues. C) They act only within one tissue. D) They are particularly sensitive to chemicals released by other body cells or by pathogens. E) They make capillaries more permeable and speed up blood flow through the area within the damaged tissue.
The renal medulla is also called the:
A. renal papilla. B. renal columns. C. renal pyramids. D. renal capsule.
All of the following are adaptations that allow the heart to use aerobic respiration for energy except which one?
A. Cardiac cells are rich in myoglobin. B. Cardiac cells are rich in glycogen. C. Cardiac cells use a variety of fuels as energy sources. D. Cardiac cells have fewer mitochondria.
The thymus gland is located within the mediastinum, ________ to the heart and ________ to the sternum.
A. inferior; posterior B. superior; posterior C. superior; anterior D. posterior; inferior E. inferior; anterior