Homework Answers
Repetition of the contraction cycle requires the presence of an adequate number of Ca2+ ions.
Muscle contraction is triggered by Ca2+ ions, Ca2+ ions is released by sarcoplasmic reticulum and activate troponin then muscle contraction initiated.
Answer - B. requires the presence of an adequate number of Ca2+ ions
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70) Repetition of the contraction cycle: A) requires the absence of ATP b) requires the presence...
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Which of the following is the initial event in the mechanical contraction process (the 'C' part of E-C coupling, beginning at the myofibril)? A) Tropomyosin is shifted off the Myosin binding site on Actin B) Ca++ binds to Troponin C) ATP is cut into ADP and PO4 D) Myosin binds to Actin
1.During skeletal muscle contraction, the following occurs except A)ATP hydrolysis directly causes the movement of the...
1.During skeletal muscle contraction, the following occurs except A)ATP hydrolysis directly causes the movement of the myosin head to cause a power stroke B)When the myosin head releases a phosphate, it can bind actin C)When a new ATP binds to a myosin head, it releases actin D)ATP hydrolysis activates the myosin head so it can bind actin E)When the myosin head binding actin releases ADP, it moves to create the power stroke 2.During skeletal muscle contraction, the length of the...
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13. During skeletal musele contraction, whet substance does the sarcoplasmic reticulum store and release? A. acetyicholine...
13. During skeletal musele contraction, whet substance does the sarcoplasmic reticulum store and release? A. acetyicholine B. sodium D. calcium 34. What stimalates the sarcoplasmic reticulum (SR) to release this chemical? A. the voltage change from the muscular action potential traveling down the transverse (1) tubules B. the binding of acetylcholine to ligand-gated channels in the transverse tubules C. direct stimulus from the neural action potential D, the binding of myosin to actin 35. Transverse (T) tubales are extensions of...
1. During muscle contraction, hydrolysis of ATP results in A) a change in the conformation of...
1. During muscle contraction, hydrolysis of ATP results in A) a change in the conformation of actin B) a change in the conformation of myosin C) association of myosin head to actin D) dissociation of myosin from actin E) no effect on muscle contraction 2. The steady state assumption, as a to monosubstrate enzyme kinetics, implies: A) Concentration of substrate is not changing B) Concentration of product is not changing C) Concentration of ES complex is not changing D) Formation...
Directly responsible for the power stroke associated with contraction Release of O a Natt release of...
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efer Figure2 to answer questions 18-21: 8. produce the myelin sheaths of neurons in the central Figure 2 nervous system. 19 form the Blood Brain Barrier 20._ are responsible for neurotransmitter release. 21 have ligand gated ion channels that are activated by neurotransmitters 22. Functionally, which cellular location is the neuron's "decision- making site" as to whether or not an action potential will be initiated? A axonal membrane B. axon hillock C. dendritic membrane D. presynaptic membrane 23. Calcium and...
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1. During muscle contraction, hydrolysis of ATP results in A) a change in the conformation of actin B) a change in the conformation of myosin C) association of myosin head to actin D) dissociation of myosin from actin E) no effect on muscle contraction 2. The steady state assumption, as a to monosubstrate enzyme kinetics, implies: A) Concentration of substrate is not changing B) Concentration of product is not changing C) Concentration of ES complex is not changing D) Formation...
Directly responsible for the power stroke associated with contraction Release of O a Natt release of Phosphate and ADP from myosin Dhead o Binding of binding of Phosphate and ADP to actin d, head QUESTION 16 Can lead to muscle atrophy a. Limb cast b. space flight Oc.sedentary life style d. all of above QUESTION 17 Highest concentration of Car+ voltage gated channels in which a cardiac caveolae b. skeletal muscle s intercalated disk d. Smooth muscle QUESTION 18 Muscle...
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