Solved

The First Heart Sound, "Lub," Is Caused by the Closure

Question 15

Multiple Choice

The first heart sound, "lub," is caused by the closure of the ________ valves.

A) semilunar
B) pulmonary
C) atrioventricular (AV)
D) aortic

Related Questions

Q10: What does the umbilical vein carry?<br>A) metabolic

Q11: The heart sounds "lub" and "dup" result

Q12: What is the volume of blood pumped

Q13: Match the following:<br>-Wave on the electrocardiogram (ECG)

Q14: What are the tiny white cords that

Q16: Match the following:<br>-These vessels return blood to

Q17: Coronary artery disease results from _.<br>A) persistent

Q18: The vagus nerve operates under the control

Q19: A blood pressure reading of 120/80 mm

Q20: Blood is returned to the right side