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The graph illustrates an action potential. Label when sodium and potassium channels are opening and closing....
CNCORA 6 of 10 > Action potentials in neurons involve opening and closing of voltage-gated Nat...
CNCORA 6 of 10 > Action potentials in neurons involve opening and closing of voltage-gated Nat and K ion channels. Place the events of an action potential in order, starting and ending with a cell at its resting membrane potential. Resting state Return to resting state Answer Bank A graded potential brings the membrane to threshold potential. Fast Na+ and slow K* channels are activated. Nat rushes into the cell, causing membrane depolarization. K channels close slowly, resulting in hyperpolarization....
Please answer question According to the plot of an action potential, select the answer that is...
Please answer question
According to the plot of an action potential, select the answer that is false. Membrane Potential (mv) The voltage gated sodium channel is inactivated at time point 3. The membrane is repolarizing at time point 3. Voltage gated potassium channels are open at time point 4. The membrane cannot undergo another action potential at time point 4. The voltage gated sodium channels are closed at time point 2.
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
The fixed pattern of changes in membrane potential during an action potential is coordinated by the...
The fixed pattern of changes in
membrane potential during an action potential is coordinated by the
sequential opening and closing of voltage-gated ion channels. Can
you identify the status (open/closed) of the voltage-gated Na+ and
K+ channels during each phase of an action potential? Drag the
appropriate labels onto the graph to indicate the status (open or
closed) of the voltage-gated Na+ and K+ channels during each phase
of an action potential. Labels may be used once, more than once,...
3. Saxitoxin prevents sodium channels from opening. Membrane Potential - - - - - - -...
3. Saxitoxin prevents sodium channels from opening. Membrane Potential - - - - - - - - Time 4. Neostigmine competitively inhibits acetyelcholinesterase (the enzyme that breaks down the neurotransmitter acetylcholine). This means the neostigmine gives the neurotransmitter more time to interact with receptors on the post-synaptic cell before the neurotransmitter is broken down by enzymes. Membrane Potential Time
Help! What might be the "stimulus" that initiates the action potential? Incorrect Question 10 0/1 pts...
Help! What might be the "stimulus" that initiates the action
potential?
Incorrect Question 10 0/1 pts Action potential +40 Voltage (mv) 5 Stimulus 1 4 2 3 Time (ms) What might be the "stimulus" that initiates the action potential? the activty of sodium/potassium ATPase the activty of calcium ATPase the activity of potassium ion channels the activity of ligand gated channels the activity of sodium ion channels
Membrane potential (mV) Time (ms) Time (ms) 14. Why do the channels at II on the...
Membrane potential (mV) Time (ms) Time (ms) 14. Why do the channels at II on the figure stay open longer than those at 1? a. Channels at I are responding to a depolarization, whereas channels at II are responding to a hyperpolarization b. The depolarization is a faster event compared to the repolarization. c. Channels at I are less sensitive to voltage compared to channels at II. d. Channels at I become inactivated, whereas channels at II close due to...
If a drug partly blocks a membrane potassium channels what happens to the action potential?
If a drug partly blocks a membrane potassium channels what happens to the action potential?
Potassium channels open first following stimulation leading to an action potential Select one: True False The...
Potassium channels open first following stimulation leading to an action potential Select one: True False The concentration of sodium ions are highest in the cytoplasm of neurons Select one: True False
Draw an action potential on a graph showing the x-axis and y-axis with proper labels and...
Draw an action potential on a graph showing the x-axis and y-axis with proper labels and numbers (the numbers are approximate as they may vary slightly from neuron to neuron). A. Describe the ionic conductances that underlie the action potential including gating of the specific ion channels at threshold, rising phase, falling phase and the undershoot phase. Explain threshold, absolute refractory period and relative refractory period in relation to the action potential. B. C. Sodium and potassium currents demonstrate very...
CNCORA 6 of 10 > Action potentials in neurons involve opening and closing of voltage-gated Nat and K ion channels. Place the events of an action potential in order, starting and ending with a cell at its resting membrane potential. Resting state Return to resting state Answer Bank A graded potential brings the membrane to threshold potential. Fast Na+ and slow K* channels are activated. Nat rushes into the cell, causing membrane depolarization. K channels close slowly, resulting in hyperpolarization....
Please answer question
According to the plot of an action potential, select the answer that is false. Membrane Potential (mv) The voltage gated sodium channel is inactivated at time point 3. The membrane is repolarizing at time point 3. Voltage gated potassium channels are open at time point 4. The membrane cannot undergo another action potential at time point 4. The voltage gated sodium channels are closed at time point 2.
The fixed pattern of changes in
membrane potential during an action potential is coordinated by the
sequential opening and closing of voltage-gated ion channels. Can
you identify the status (open/closed) of the voltage-gated Na+ and
K+ channels during each phase of an action potential? Drag the
appropriate labels onto the graph to indicate the status (open or
closed) of the voltage-gated Na+ and K+ channels during each phase
of an action potential. Labels may be used once, more than once,...
3. Saxitoxin prevents sodium channels from opening. Membrane Potential - - - - - - - - Time 4. Neostigmine competitively inhibits acetyelcholinesterase (the enzyme that breaks down the neurotransmitter acetylcholine). This means the neostigmine gives the neurotransmitter more time to interact with receptors on the post-synaptic cell before the neurotransmitter is broken down by enzymes. Membrane Potential Time
Help! What might be the "stimulus" that initiates the action
potential?
Incorrect Question 10 0/1 pts Action potential +40 Voltage (mv) 5 Stimulus 1 4 2 3 Time (ms) What might be the "stimulus" that initiates the action potential? the activty of sodium/potassium ATPase the activty of calcium ATPase the activity of potassium ion channels the activity of ligand gated channels the activity of sodium ion channels
Membrane potential (mV) Time (ms) Time (ms) 14. Why do the channels at II on the figure stay open longer than those at 1? a. Channels at I are responding to a depolarization, whereas channels at II are responding to a hyperpolarization b. The depolarization is a faster event compared to the repolarization. c. Channels at I are less sensitive to voltage compared to channels at II. d. Channels at I become inactivated, whereas channels at II close due to...
Draw an action potential on a graph showing the x-axis and y-axis with proper labels and numbers (the numbers are approximate as they may vary slightly from neuron to neuron). A. Describe the ionic conductances that underlie the action potential including gating of the specific ion channels at threshold, rising phase, falling phase and the undershoot phase. Explain threshold, absolute refractory period and relative refractory period in relation to the action potential. B. C. Sodium and potassium currents demonstrate very...
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