Multiple Choice
When a doctor uses a stethoscope to listen to your heart and hears the lub-dub sound,she is actually listening to the:
A) valves in the heart closing.
B) blood surging through the arteries.
C) contraction of the cardiac muscle in the ventricles.
D) electrical signals that control heartbeat.
Correct Answer:
Verified
Correct Answer:
Verified
Q67: When the diaphragm contracts,the thoracic cavity _,and
Q68: Arteries always carry blood that is oxygen
Q69: Which of the following will raise HDL
Q70: Prepare an argument for why the following
Q71: Particularly with regard to gas exchange,why do
Q72: Refer to the figure below, and then
Q73: List the pathway a single red blood
Q74: Which blood component is made of fragments
Q75: Blood flow from the heart,to the lungs,and
Q77: The tiny air sacs of the lungs