Multiple Choice
What is the cardiac cycle?
A) The passage of electrical impulses from the AV node to the SN node to heart muscle
B) The alternating relaxation and contraction of the heart chambers
C) The movement of blood from systemic to pulmonary circulation
D) The movement of blood from the heart to the lungs and then back to the heart
Correct Answer:

Verified
Correct Answer:
Verified
Q16: Each of the following types of white
Q17: In a grasshopper, all the body tissues
Q18: What is the role of valves in
Q19: Long-distance runners like to train at high
Q20: The left ventricle is more muscular than
Q22: White blood cells<br>A) clot blood.<br>B) are formed
Q23: It is important that the atrioventricular (AV)
Q24: Erythropoietin stimulates the manufacture of<br>A) albumin.<br>B) red
Q25: The aorta<br>A) is a major vein.<br>B) connects
Q26: How do lymphatic capillaries differ from blood