Practice Quiz

PANCE Practice Test

Category - PA

Start a Study Session Sign up for Question of the Day
Which of the following actions produces the first heart sound (S1)?
  1. opening of the mitral and tricuspid valves
  2. closing of the mitral and tricuspid valves
  3. opening of the aortic and pulmonic valves
  4. closing of the aortic and pulmonic valves
Explanation
Answer: B - Mitral and tricuspid valve closing produces S1 marking the beginning of systole or ventricular contraction.
Previous Next
Was this helpful? Upvote!
Login to contribute your own answer or details
Start a Study Session Sign up for Question of the Day

Top questions

Related questions

Most popular on PracticeQuiz