Which of the following terms can be defined as a change in electrical charge acr

Question

Which of the following terms can be defined as a change in electrical charge across a membrane that dissipates with time? a. action potential b. electrical potential c. local potential d. membrane potential e. none of the above

Which of the following steps in muscle contraction does not take ATP? a. Resetting Na+/K+ balance of membrane b. Reimporting Ca++ into the SR c. Cocking the myosin head d. Powerstroke of the myosin head e. All of the above use ATP

All of the following are reasons for fatigue in muscle except a. acetylcholine is used up b. damage to myofibrils c. glycogen consumed d. lactic acid buildup changes pH e. sodium-potassium pumps fail to keep potential

Explanation / Answer

1.Action potential. When there is a change in electrical charge called action potential. It occurs with depolarization.

2.Resetting Na+/K+balance of membrane. As it occurs with passive transport.

3. Glycogen consumed. Becuase after getting muscle fatigue with lack of energy yileds the energy from the glycogen. It doesn't cuases muscle fatigue.

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