The plateau in the action potential of cardiac muscle results from the action of ________
A) K+ inflow
B) K+ outflow
C) slow Ca2+ channels
D) Na+ inflow
E) fast Ca2+ channels
C
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An abnormally formed ________ will interfere with the development of clear speech.
A. molar B. frenulum C. vermiform D. duodenum
A rise in angiotensin II levels would result in
A) elevated blood pressure. B) increased water retention. C) increased blood volume. D) increased retention of sodium ions at the kidney. E) all of these effects.
The area where the major vessels lead to and from the heart's chambers is called the ________ of the heart. The pointy, inferior portion is called the ________.
A. apex; base B. atrium; ventricle C. ventricle; atrium D. endocardium; epicardium E. base; apex
The three kinds of formed elements in blood are
A) red cells, brown cells, and white cells. B) red cells, fibroblasts, and brown cells. C) white cells, fibroblasts, and platelets. D) white cells, red cells, and platelets. E) mast cells, red cells, and white cells.