Homework Answers
The following changes occur during initiation of impulse in nerve.
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Which section of the graph represents the time when sodium AND potassium ions voltage gates are...
Draw a graph showing what would happen to resting membrane potential over time, if the sodium/potassium...
Draw a graph showing what would happen to resting membrane potential over time, if the sodium/potassium pump were not functioning. How would this affect a neuron's ability to produce action potentials? What does this imply about the quantity of ions that normally cross the membrane during the course of an action potential?
Question 2: Explain what is occurring in this graph: +30 mv Nat Nat K+ Sodium gates...
Question 2: Explain what is occurring in this graph:
+30 mv Nat Nat K+ Sodium gates dose Nat Nat Potassium gates open Depolarization Active sodium and potassium pumps. Nat Nat K Repolarization Rest -55 mv-Gate threshold -70 mv Stimulus potential Nat (1) TO Nat K+ -90 mV E Hyperpolarization
The graph illustrates an action potential. Label when sodium and potassium channels are opening and closing....
The graph illustrates an action potential. Label when sodium and potassium channels are opening and closing. Answer Bank potassium channels open sodium channels open sodium channels close Membrane potential (mV) Rest potential potassium channels close Time (ms)
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
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
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
could you please explain how you did each one 5. Draw a graph showing what would...
could you please explain how you did each one
5. Draw a graph showing what would happen to resting membrane potential over time, if the sodium/potassium pump were not functioning. How would this affect a neuron's ability to produce action potentials? What does this imply about the quantity of ions that normally cross the membrane during the course of an action potential? (Group D). Topic 2: Action potential conduction and synaptic transmission 6. How would you alter sodium and/or potassium...
choices for A: Na+/K+ pumps, voltage gated K+ channels, voltage gated Ca+ channels, voltage gated Na+...
choices for A: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
choices for B: bidirectionally, unidirectionally
choices for C: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
choices for D: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
Consider this graph illustrating the generation of an action potential across the plasma membrane of a stimulated neuron. +40 ACTION POTENTIAL plasma membrane potential...
33) Which of the following is most likely true of a protein that cotransports glucose and...
33) Which of the following is most likely true of a protein that cotransports glucose and sodium ions into the intestinal cells of an animal? A) Sodium and glucose bind to the same site on the cotransporter. B) Transport of glucose against its concentration gradient provides energy for uptake of sodium ions against the electrochemical gradient. C) Sodium ions can be transported whether or not glucose is present outside the cell, but glucose transport requires cotransport of sodium ions. D)...
please help me Directions: Use graph of change in membrane potential during a typical action potential...
please help me
Directions: Use graph of change in membrane potential during a typical action potential in a nerve cell below to answer questions 30-32 +50 Action potential 0- potential (mv) Membran 50 - Threshold o 5 Resting potential -100 Time 32. On the graph, what is taking place at #2? A. Repolarization B. Hyperpolarization C. Depolarization D. None of the above 33. On the graph, what is taking place at #4? A. Repolarization B. Hyperpolarization C. Depolarization D. None...
Question 2: Explain what is occurring in this graph:
+30 mv Nat Nat K+ Sodium gates dose Nat Nat Potassium gates open Depolarization Active sodium and potassium pumps. Nat Nat K Repolarization Rest -55 mv-Gate threshold -70 mv Stimulus potential Nat (1) TO Nat K+ -90 mV E Hyperpolarization
The graph illustrates an action potential. Label when sodium and potassium channels are opening and closing. Answer Bank potassium channels open sodium channels open sodium channels close Membrane potential (mV) Rest potential potassium channels close Time (ms)
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
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
could you please explain how you did each one
5. Draw a graph showing what would happen to resting membrane potential over time, if the sodium/potassium pump were not functioning. How would this affect a neuron's ability to produce action potentials? What does this imply about the quantity of ions that normally cross the membrane during the course of an action potential? (Group D). Topic 2: Action potential conduction and synaptic transmission 6. How would you alter sodium and/or potassium...
choices for A: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
choices for B: bidirectionally, unidirectionally
choices for C: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
choices for D: Na+/K+ pumps, voltage gated K+ channels,
voltage gated Ca+ channels, voltage gated Na+ channels
Consider this graph illustrating the generation of an action potential across the plasma membrane of a stimulated neuron. +40 ACTION POTENTIAL plasma membrane potential...
33) Which of the following is most likely true of a protein that cotransports glucose and sodium ions into the intestinal cells of an animal? A) Sodium and glucose bind to the same site on the cotransporter. B) Transport of glucose against its concentration gradient provides energy for uptake of sodium ions against the electrochemical gradient. C) Sodium ions can be transported whether or not glucose is present outside the cell, but glucose transport requires cotransport of sodium ions. D)...
please help me
Directions: Use graph of change in membrane potential during a typical action potential in a nerve cell below to answer questions 30-32 +50 Action potential 0- potential (mv) Membran 50 - Threshold o 5 Resting potential -100 Time 32. On the graph, what is taking place at #2? A. Repolarization B. Hyperpolarization C. Depolarization D. None of the above 33. On the graph, what is taking place at #4? A. Repolarization B. Hyperpolarization C. Depolarization D. None...
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