Question 1. which if the following does not occur during the\"Excitation\" of a skeletal muscle?
A. The myosin head binding site on actin is exposed
B. ATPase on myosin heads split ATP
C. The passive force of contraction increases
D. The cell membrane depolarizes
Question 2. Which if the following does not occur duringskeletal muscle contraction?
A. titin fibers compress
B. Actin and myosin shorten
C. sacromeres shorten
Question 3. Which of the following describes the relationshipbetween the type of metabolism used by skeletal msucle fiber andits resistance to fatigue?
A. muscle fibers that habe a high glycolytic ability do notfatgue
B. muscle fibers with a high oxidative capacity have a highresistance to fatigue
C. Muscle fibers with a low oxidative capacity are resistantto fatgue
Question 4. The strength of a muscle contraction is determinedall of the following except?
A. The number of muscle fibers in a motor unit thatcontract
B. the frequncy of a stimuli applied to a muscle
C.the number of motor units recruited
Question 5. what can you conclude about posturalmuscles?
A. These muscles contain slow twitch muscles can sustaincontraction while resisting fatigue
B. These muscles contain fast oxidative muscle fiber that havea low resistance to fatigue
C. These muscles contain fast twitch muscle fibers that cancorrect posture changes rapidly
