Homework Answers
Action potential depends on the voltage gated ion channels,mainy sodium ion channel by which sodium ion entered inside the axon to become neuron depolarised by which action potential generate to work
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Multiple Choice Action potentials A) rapid reversal of membrane potential B) occurs at nodes of ranvier...
Multiple Choice Which of the following statements about action potentials is incorrect? During an action potential,...
Multiple Choice Which of the following statements about action potentials is incorrect? During an action potential, the efflux of K ions causes the inside of cells to become more positive (depolarized). B) When critical threshold is reached an action potential is triggered C) Voltage gated channels are required to reach critical threshold D) Sodium ions diffuse across the membrane to cause depolarization. E) K ions continue to efflux after resting membrane is reached to cause repolarization
QUESTION 8 he membrane potential becomes more negative than the resting potential during the after-hyperpolarization phase...
QUESTION 8 he membrane potential becomes more negative than the resting potential during the after-hyperpolarization phase of the action potential (AHP) because Ligand-galed Nat channels are inactivated and cannot be opened Voltage-gated K channels become inactivated The K equilibrium potential is below the resting membrane potential All ofthe above. None of the above QUESTION 9 When an action potential reaches the axon terminal, release of neurotransmitter is triggered by... a. movement of sodium ions into the axon terminal b. movement...
Section 1 Answer the multiple-choice questions 1-46 on the scantron. 1. Rapid impulse conduction from "node" to "node" (node of Ranvier) is called: A) spatial propagation. B) salt...
Section 1 Answer the multiple-choice questions 1-46 on the scantron. 1. Rapid impulse conduction from "node" to "node" (node of Ranvier) is called: A) spatial propagation. B) saltatory propagation. C) divergent propagation. D) synaptic transmission. E) continuous propagation. 2. Nerve cells control skeletal muscles by using A) the cranial nerves only B) plasma cells C) the spinal nerves only D) electrical impulses E) none of the above 3. The term "voltage regulated" channels means that the membrane ion channels open...
Compare and contrast graded potentials and action potentials, with particular attention to their locations in the...
Compare and contrast graded potentials and action potentials, with particular attention to their locations in the neuron and the ions and ion channels involved in each. Label a voltage-versus-time diagram of an action potential with the ions involved in each phase, the direction of their movement across the membrane, and the terms depolarize, repolarize, and hyperpolarize. Describe the physiological process involved in the conduction (propagation) 2 of an actic potential, including the types and locations of the ion channels involved....
For action potentials and membrane potentials: Describe how the membrane depolarizes and then repolarizes, how an...
For action potentials and membrane potentials: Describe how the membrane depolarizes and then repolarizes, how an action potential opens voltage gated channels in front of it and thus passes the action potential further and further down the neuron.
Which of the following statements about action potentials is incorrect? O a) During an action potential,...
Which of the following statements about action potentials is incorrect? O a) During an action potential, the efflux of Kions causes the inside of cells to become more positive (depolarized). B) When critical threshold is reached an action potential is triggered C) Voltage gated channels are required to reach critical threshold D) Sodium ions diffuse across the membrane to cause depolariza D U E)Kions continue to efflux after resting membrane is reached to cause repolarization ause
For each phase of an action potential, indicate the ion channel most responsible for the membrane...
For each phase of an action potential, indicate the ion channel most responsible for the membrane potential change that occurs during the phase. Action Potential Phases Ion Channels Depolarization phase Repolarization phase Hyperpolarization phase Voltage-gated potassium channels Chemically-gated sodium channels Chemically-gated potassium channels Voltage-gated sodium channels
During an action potential, which of the following actions does not help return the membrane to...
During an action potential, which of the following actions does not help return the membrane to its resting potential? Choose one: O A. the inactivation of voltage-gated Nat channels O B. the opening of voltage-gated K+ channels O C. the opening of voltage-gated Nat channels O D. the flow of K+ through K+ leak channels
An action potential does not move back wards in the axon because.. a.Voltage-gated sodium channels behind...
An action potential does not move back wards in the axon because.. a.Voltage-gated sodium channels behind the action potential are inactivated. b. Potassium leak channels no longer let potassium ions through c. Voltage-gated sodium channels are open d. Mechanically-gated channels prevent outflow of sodium e. Voltage-gated potassium channels are closed
QUESTION 35 Which of the following is NOT true regarding the propagation of action potentials O...
QUESTION 35 Which of the following is NOT true regarding the propagation of action potentials O A. All of these statements are true B. The magnitude of the action potential stays the same as it travels down the axon. C. Voltage-gated Na+ channels open only when the threshold potential is reached. OD. Each segment of the axon prevents the adjacent segments from firing, E. The refractory period allows the impulse to travel in only one direction OF. None of these...
Multiple Choice Which of the following statements about action potentials is incorrect? During an action potential, the efflux of K ions causes the inside of cells to become more positive (depolarized). B) When critical threshold is reached an action potential is triggered C) Voltage gated channels are required to reach critical threshold D) Sodium ions diffuse across the membrane to cause depolarization. E) K ions continue to efflux after resting membrane is reached to cause repolarization
QUESTION 8 he membrane potential becomes more negative than the resting potential during the after-hyperpolarization phase of the action potential (AHP) because Ligand-galed Nat channels are inactivated and cannot be opened Voltage-gated K channels become inactivated The K equilibrium potential is below the resting membrane potential All ofthe above. None of the above QUESTION 9 When an action potential reaches the axon terminal, release of neurotransmitter is triggered by... a. movement of sodium ions into the axon terminal b. movement...
Section 1 Answer the multiple-choice questions 1-46 on the scantron. 1. Rapid impulse conduction from "node" to "node" (node of Ranvier) is called: A) spatial propagation. B) saltatory propagation. C) divergent propagation. D) synaptic transmission. E) continuous propagation. 2. Nerve cells control skeletal muscles by using A) the cranial nerves only B) plasma cells C) the spinal nerves only D) electrical impulses E) none of the above 3. The term "voltage regulated" channels means that the membrane ion channels open...
Compare and contrast graded potentials and action potentials, with particular attention to their locations in the neuron and the ions and ion channels involved in each. Label a voltage-versus-time diagram of an action potential with the ions involved in each phase, the direction of their movement across the membrane, and the terms depolarize, repolarize, and hyperpolarize. Describe the physiological process involved in the conduction (propagation) 2 of an actic potential, including the types and locations of the ion channels involved....
Which of the following statements about action potentials is incorrect? O a) During an action potential, the efflux of Kions causes the inside of cells to become more positive (depolarized). B) When critical threshold is reached an action potential is triggered C) Voltage gated channels are required to reach critical threshold D) Sodium ions diffuse across the membrane to cause depolariza D U E)Kions continue to efflux after resting membrane is reached to cause repolarization ause
During an action potential, which of the following actions does not help return the membrane to its resting potential? Choose one: O A. the inactivation of voltage-gated Nat channels O B. the opening of voltage-gated K+ channels O C. the opening of voltage-gated Nat channels O D. the flow of K+ through K+ leak channels
QUESTION 35 Which of the following is NOT true regarding the propagation of action potentials O A. All of these statements are true B. The magnitude of the action potential stays the same as it travels down the axon. C. Voltage-gated Na+ channels open only when the threshold potential is reached. OD. Each segment of the axon prevents the adjacent segments from firing, E. The refractory period allows the impulse to travel in only one direction OF. None of these...
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