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Which of the following substances regulates muscle actions? potassium calcium troponin tropomyosin - ANS - calcium Which of the following substances acts at the NMJ to excite the muscle fibers of a motor unit? acetylcholine ATP creatine phosphate serotonin - ANS - acetylcholine When throwi...

Why do sedentary ,healthy adults require dietary proteins/amino acids to maintain good health? a. to maintain cellular structure and function b. to prevent diseases such as cancer c. to strengthen bones - ANS - ANSWER: a. to maintain cellular structure and function EXPLANATION: Protein is the ...

A strength and conditioning professional is training two 16-year-old males; one has developed facial hair and a deepened voice, while the other has not. Which of the following is the most effective indicator of their physical maturation level? a. exercise readiness b. chronological age c. skele...

How does VO2max change with chronic aerobic endurance training? What causes this change? - ANS - Increases, due to increased Q (cardiac output; due to increased SV, not HR) How is HR affected by chronic aerobic endurance training? - ANS - Unchanged or decreased slightly Heart adaptations to chro...

Which training modality cannot utilize a 5% increase in training intensity as effectively? - ANS - training for hypertrophy hypertrophy - ANS - large number of exercises with short recovery periods, which does not facilitate a simple 5% increase for every exercise James has been training for and...

Which of the following substances regulates muscle actions? potassium calcium troponin tropomyosin - ANS - calcium Which of the following substances acts at the NMJ to excite the muscle fibers of a motor unit? acetylcholine ATP creatine phosphate serotonin - ANS - acetylcholine When throwi...

Why do sedentary ,healthy adults require dietary proteins/amino acids to maintain good health? a. to maintain cellular structure and function b. to prevent diseases such as cancer c. to strengthen bones - ANS - ANSWER: a. to maintain cellular structure and function EXPLANATION: Protein is the ...

To what structures do the cross-bridges attach during muscle action? - ANS - Actin Which substance regulates muscle actions? - ANS - Calcium Which substance acts at the neuromuscular junction to excite the muscle fibers of a motor unit? - ANS - Acetylcholine Which muscle fiber type is the MOST b...

Which of the following changes in muscle length and tension are associated with a muscle spindle and a golgi tendon? A. MS - rapid muscle length change, GT - increase in muscle tension B. MS - decrease in muscle tension, GT - slow muscle length change C. Slow muscle length change, GT - decrease ...

To which of the following structures do the cross-bridges attach during muscle action? - ANS - Actin When throwing a baseball, an athlete's arm is rapidly stretched just prior to throwing the ball. Which of the following structures detects and responds to that stretch by reflexively increasing ...