Which valve is closed during heart relaxation to prevent blood from backflowing from the aorta into the heart?
A) bicuspid (mitral) valve
B) tricuspid valve
C) pulmonary semilunar valve
D) aortic semilunar valve
D
Anatomy & Physiology
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Combinations of atoms that contain two or more different elements are called
A) molecules. B) compounds. C) mixtures. D) isotopes. E) None of these is correct.
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The smooth muscle of the digestive viscera is served largely by the ________
A) pelvic nerves B) vagus (X) nerves C) lumbar splanchnic nerves D) cephalic plexus
Anatomy & Physiology
A future treatment for baldness may potentially be
A) scalp transplants. B) stem cells from the bulb region at the base of hair follicles. C) high protein shakes. D) head massages.
Anatomy & Physiology