Multiple Choice
Opening and closing of the heart valves is caused by ________.
A) breathing
B) gravity
C) valves contracting and relaxing
D) osmotic gradients
E) pressure gradients
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q28: The first and second heart sounds are
Q29: All cardiac veins empty into the _,
Q30: Which of the following terms is mismatched
Q31: Angina pectoris is chest pain caused by
Q32: An incompetent mitral valve may cause blood
Q34: What vessel exits the left ventricle?<br>A) Pulmonary
Q35: The function of the pericardial fluid is
Q36: The heart skeleton is fibrous connective tissue
Q37: The baroreceptor reflex would cause which of
Q38: From the right ventricle, blood flows directly