As blood is pumped out of the heart and into the major arteries leaving the heart, it
A. pushes against the atrioventricular valves and opens them.
B. fills the cusps of the semilunar valves, causing them to expand and block the backflow of blood
C. pushes against the semilunar valves and opens them.
D. fills the cusps of the atrioventricular valve causing opening of the bicuspid and closure of the tricuspid.
E. pushes against the semilunar valves and closes them.
Answer: C
You might also like to view...
Which protein types are vitally important to cell function in all types of stressful circumstances?
A) structural proteins B) molecular chaperones C) catalytic proteins D) regulatory proteins
Multiunit smooth muscle
a. is neurogenically activated. b. under ANS control. c. found in the iris of the eye. d. all of these answers. e. none of these answers.
Inadequate bile secretion will limit emulsification of fats.
Answer the following statement true (T) or false (F)
Most air-breathing chelicerates use a series of 10-100 thin lamellae, collectively called __________, to extract oxygen from the air
Fill in the blank with the correct word.