All of the following are characteristic of delayed onset muscle soreness (DOMS) EXCEPT: It is more easily evoked by high intensity eccentric vs. high intensity concentric muscle contractions O It results from the accumulation of lactic acid (lactate) in the working skeletal muscle O The associated pain and tenderness peaks 24-48 hours after the exercise bout It is thought to result from the forcible detachment of actin from myosin

All of the following are characteristic of delayed onset muscle soreness (DOMS) EXCEPT: It is more easily evoked by high intensity eccentric vs. high intensity concentric muscle contractions O It results from the accumulation of lactic acid (lactate) in the working skeletal muscle O The associated pain and tenderness peaks 24-48 hours after the exercise bout It is thought to result from the forcible detachment of actin from myosin

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter8: Muscle Physiology

Section: Chapter Questions

Problem 11RE

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Figure 38.37 Which of the following statements about muscle contraction is true? The power stroke occurs when ATP is hydrolyzed to ADP and phosphate. The power stroke occurs when ADP and phosphate dissociate from the myosin head. The power stroke occurs when ADP and phosphate dissociate from the actin active site. The power stroke occurs when Ca2+ binds the calcium head.
The _____ is the basic unit of muscle contraction. a. myofibril b. sarcomere c. muscle fiber d. myosin filament
Skeletal muscle contraction requires _________. a. calcium ions b. ATP c. arrival of a nerve impulse d. all of the above
Muscles relaxatiom occurs when acetylcholine is cleaved from its receptors ,calcium is pulled back into the sarcoplasmic recticulum,the myosin is released from its binding site ,and the muscle fiber returns to its resting lenght true or false
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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
Arrange the following in statements in the order that they occur during muscle contraction: 1-10 ACh leaves the synaptic knob and enters the synaptic cleft The action potential is carried deep into the muscle cell by T tubules The muscle cell relaxes and lengthens Myosin binds to and pulls on actin, resulting in muscle shortening Calcium attaches to troponin As calcium re-enters the sarcoplasmic reticulum, its concentration at the myofilaments decreases Calcium is released from the sarcoplasmic reticulum Tropomyosin rolls out of the way, exposing actin ACh diffuses across the synaptic cleft and attaches to protein receptors on the sarcolemma, resulting in muscle "excitation" Na+ enters the muscle cell and K+ exits, resulting in an action potential
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Which of the following does not occur during the excitation contraction coupling of skeletal muscle? Opening of ryanodine receptor calcium channels Calcium binding to troponin Tropomyosin shifting away from myosin binding sites on the actin An end plate potential
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The sarcoplasmic reticulum is the primary storage site for Ca ion used to induced muscle contraction True O False