Which is TRUE about the function of the aortic valve?
A. It prevents the backflow of blood into the aorta during ventricular diastole.
B. It prevents the backflow of blood into the left ventricle during ventricular diastole.
C. It prevents the backflow of blood into the left ventricle during ventricular ejection.
D. It prevents the backflow of blood into the aorta during ventricular ejection.
E. Its closure causes the first heart sound.
B
You might also like to view...
Most of the small intestine is in the
A. peritoneal cavity. B. anterior pararenal space. C. perirenal space. D. posterior pararenal space.
Which structure caps the head of a mature sperm and enables the sperm to penetrate an egg?
A. Axoneme B. Acrosome C. Nucleus D. Mitochondria E. Flagellum
Nitrogen waste is usually eliminated through the integumentary system.
Answer the following statement true (T) or false (F)
Homeostasis:
1.is the maintenance of a dynamic steady-state in the cellular environment. 2.is a rigid, fixed state in the cellular environment. 3.requires the reproductive system to be fully functional at the individual level. 4.All of these are correct.