An action potential occurs at the membrane of an axon because a) negatively charged Na+flow into...
An action potential occurs at the membrane of an axon because
a) negatively charged Na+flow into the cell
b) positively charged Na+flow out of the cell
c) positively charged Na+flow into the cell
d) negatively charged Na+flow out of the cell
e) none of the above
Homework Answers
C is correct answer because during action potential , Na+ move into cell and k+ out of cell such that charge of membrane potential become +30 from -60mV.
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An action potential occurs at the membrane of an axon
because
a) negatively charged Na+flow into...
The resting membrane potential of a neuronal axon is -70 mV. When an action potential is...
The resting membrane potential of a neuronal axon is -70 mV. When an action potential is triggered, Na+ ions move into the axon, which reverses the voltage, bringing it towards 0 mV. Which of the following is the correct term for this sequence of events? a. Repolarization b. Hyperpolarization c. Depolarization d. Hypopolarization e. Isopolarization
Multiple Choice Action potentials A) rapid reversal of membrane potential B) occurs at nodes of ranvier...
Multiple Choice Action potentials A) rapid reversal of membrane potential B) occurs at nodes of ranvier C) occurs along myelin sheath D) dependent on voltage gated channels E) occurs at axon hillock
Describe the events of an action potential is conducted down the membrane of an axon and...
Describe the events of an action potential is conducted down the membrane of an axon and how it is transmitted to another cell across a synapse causing an IPSP or an EPSP.
The action potential occurs when the voltage across a cell membrane experiences an increase from the...
The action potential occurs when the voltage across a cell membrane experiences an increase from the resting potential (−70.mV) to about 30.mV. This depolarization, in turn, causes a similar response all along the cell membrane; the result is an electrical impulse that sends a signal along the axon of a neuron. The cell membranes can be about 5.0nm across and have an electric field across them due to the change in potential. What is the electric field across the membrane...
Propagation of an action potential down an axon is produced by: capacitive depolarization produced by the...
Propagation of an action potential down an axon is produced by: capacitive depolarization produced by the current lowers the membrane potential regenerative increase in Na+ permeability depolarization due to opening of Na+ channels all of the above
"When inhibitory neurotransmitters bind to their receptors in the post-synaptic cell," positively charged ions flow through...
"When inhibitory neurotransmitters bind to their receptors in the post-synaptic cell," positively charged ions flow through the ligand-gated ion channel increasing the chance that an action potential can be fired in the post-synaptic cell negatively charged ions flow through the ligand-gated ion channel decreasing the chance that an action potential can be fired in the post-synaptic cell positively charged ions flow through the stress-gated ion channel increasing the chance that an action potential can be fired in the post-synaptic cell...
The reason why action potentials are described as "all or none" is: a. because neurotransmitter is...
The reason why action potentials are described as "all or none" is: a. because neurotransmitter is released from all axon terminals or none of them. b. an action potential arriving at an axon terminal either causes all the neurotransmitters to be released or none to be released. c. either all ion channels in the axon membrane open or none open. d. if an action potential is generated in a neuron, the amplitude does not depend on the stimulus strength. e....
around the axon, which keeps Na Kions from leaking across the membrane. The create(s) an O...
around the axon, which keeps Na Kions from leaking across the membrane. The create(s) an O a. Schwann cells . action potential O b. dendrites - insulation layer O c. mylein sheath - insulation layer d. Node of Ranvier . action potential
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...
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...
Multiple Choice Action potentials A) rapid reversal of membrane potential B) occurs at nodes of ranvier C) occurs along myelin sheath D) dependent on voltage gated channels E) occurs at axon hillock
"When inhibitory neurotransmitters bind to their receptors in the post-synaptic cell," positively charged ions flow through the ligand-gated ion channel increasing the chance that an action potential can be fired in the post-synaptic cell negatively charged ions flow through the ligand-gated ion channel decreasing the chance that an action potential can be fired in the post-synaptic cell positively charged ions flow through the stress-gated ion channel increasing the chance that an action potential can be fired in the post-synaptic cell...
around the axon, which keeps Na Kions from leaking across the membrane. The create(s) an O a. Schwann cells . action potential O b. dendrites - insulation layer O c. mylein sheath - insulation layer d. Node of Ranvier . action potential
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...
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...
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