010-111 ACSM Certified Personal Trainer
QUESTION 1 What is the function of the tricuspid valve? A. It acts as a pacemaker. B. To pump blood through the heart. C. Prevents backflow of blood to the left atrium. D. Prevents backflow of blood to the right atrium. Answer: D Explanation: QUESTION 2 What is the fundamental unit of muscle contraction? A. […]?