2024 NSCA CSCS Study Guide (Chapter 1) Latest Q&A in Study Guide - A++ Guaranteed!

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1. A-Band Answer: Dark area of Sarcomere corresponding to Myosin 2. Acetylcholine Answer: Major neurotransmitter that crosses neuromuscular junction and causes excitation of the sarcolemma. In su... fficient amount creates action potential along sarcolemma and muscle contraction. 3. Actin Answer: Thin myofilament (6nm). Anchored at the Z-line. One of 2 components that make up a myofibril (actin/myosin). Closely associated with Troponin and Tropomyosin forming a double-helix. 4. Action Potential Answer: Electrical nerve impulse that drives muscle contraction.The AP originates in the cortex and via motor neurons to the motor unit drives the release of calcium from the sarcoplasmic reticulum into the myofibril. 5. All-or-None Principle Answer: A stronger AP does not produce a stronger contraction. Above a specific threshold the contraction is the same, below that threshold there is no contraction. 6. Alveolar Pressure Answer: Pressure inside of the alveoli when the glottis is open and no air is flowing into or out of the lungs. During inspiration alveolar pressure must be below ATM pressure, during expiration alveolar pressure must be above ATM pressure. 7. Alveoli Answer: Smallest respiratory branch, highest generation (23rd) where gas is exchanged in respiration. 8. AorticValve Answer: Semilunar valve that prevents back flow from Aorta during diastole (ventricular relaxation). 9. Atrioventricular Bundle (AV Bundle) Answer: Part of conduction system of the heart by relaying impulse to ventricles. [Show More]

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