CSCS Practice Exam 2023 Correct Questions & Answers!!

Each muscle fiber is surrounded by a connective tissue called? - ANSWER Endomysium What is released from the sarcoplasmic reticulum into the myofibril, causing tension development in a muscle? - ANSWER Calcium ions that bind to troponin What type of muscular contraction occurs in the pectoralis major during the slow, controlled, downward phase of a bench press? - ANSWER Eccentric What is the thick structural protein inside the sarcomere? - ANSWER Myosin A muscle fiber that is small in diameter has a slow contraction speed, and a high capillary density would be classified as? - ANSWER Type I Through which of the following valves does blood flow after contraction of the right atrium? - ANSWER Tricupsid During a typical electrocardiogram, atrial depolarization is represented by? - ANSWER P-wave While reading an ECG, electrical potential that depolarizes the ventricles is represented by? - ANSWER QRS complex What blood vessel functions to exchange oxygen, fluid, nutrients, electrolytes, hormones, and other substances between the blood and the interstitial fluid in the various tissues of the body? - ANSWER Capillaries Where are normal rhythmic electrical impulses initiated in the heart? - ANSWER Sinoatrial (SA) node When performing a biceps curl, tension in the bicep