Organization of Skeletal Muscle 8 Individual muscle fasciculi are divided into sarcomeres. b. False

Which of the following are true regarding length/tension relationships in muscle? O In the sarcomere, the maximal tension occurs at normal resting length O In the whole muscle, maximal passive tension occurs at ½ normal length In the whole muscle, maximal active tension occurs at normal resting length All of the above O Only A and C

Muscle Fiber Types 2 If a type I fiber and a type II fiber of the same size are stimulated side by side, a. type II will generate more force than type I b. type I will contract more quickly than type II c. they will generate the same amount of force d. they will contract at the same speed OOOOO

Arrange the steps of muscle innervation and contraction in response to touching a hot plate. appendage is removed from stimulus v movement is produced muslce fibers work together to produce action muscle contraction occurs and the sarcomere shortens Myosin heads bind thin filament Calcium binds troponin Calcium is released T tubules carry the action potential to the sarcoplasmic reticulum Action potential is generated in the sarcolemma as a result of opened sodium channels The presynaptic cell releases acetylcholine Signal arrives at the neuromuscular junction Sensory receptors detect uncomfortable heat Afferent neurons carry impulse to the central nervous system Signal reaches the reflex arc in the central nervous system and is directed out through the anterior horn Signal travels through the motor units > |> > > |> > > > > > > > >

Describe the organization and composition of skeletal muscle from smallest to largest components

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Perimysium surrounds individual muscle cells. O True False

Fast-twitch muscle fibers are also called type ________fibers and slow-twitch are called type _____________fibers.      A, B     I, II     II, I     B, A

Actin in action, muscle satisfaction. The movement of biceps require sarcomere . Select one: a. contradiction b. contraction c. election d. this is no correct option e. faction Next page

Which skeletal muscle fiber type would fatigue the fastest? SO FG SG FO