HK 100 Exam 1 Questions & Answers /2024

HK 100 Exam 1 False - Answer- A motor unit consists of a muscle fiber and all the nerve fibers that innervate it (True/false) False - Answer- Skeletal muscle fibers are composed primarily of thick actin and thin myosin proteins (true/false) true - Answer- Concentric contractions involve muscle shortening (true/false) true - Answer- When a muscle fiber contracts, the myosin filaments connect onto the actin filaments and pull the actin toward the middle of the myosin (true/false) eccentric - Answer- What type of muscular contraction is more likely than the other types of muscular contractions to produce delayed onset muscular soreness? phosphagen system - Answer- Which energy system provides the most rapid source of ATP breakdown? phosphagen and glycolytic - Answer- Which energy system/s does/do not use oxygen? aerobic - Answer- In which energy system/s is/are fatty acids used? aerobic - Answer- In which energy system/s is/are proteins used? phosphagen, anaerobic, and aerobic - Answer- In which energy system/s is/are carbohydrates used? stroke volume - Answer- The amount of blood ejected from the heart per each heart beat is called what? slow twitch - Answer- What type of muscle fibers tend to be small, produce low levels of force, be resistant to fatigue, and have a high oxidative capacity? false - Answer- Highly trained individuals will not experience an oxygen deficit when they start exercising at a sub-max level (true/false) heart rate and stroke volume - Answer- cardiac output is a function of what two elements? Respiratory rate and tidal volume - Answer- pulmonary ventilation is a function of what two elements? true - Answer- As a result of endurance training, a person's resting heart rate and submit exercise heart rate decrease, but a person's maximal heart rate does not change (true/false)