Voltage-gated calcium channels are localized to which part of the neuron? axon terminal axon dendrites and...
Voltage-gated calcium channels are localized to which part of the neuron?
| axon terminal | |
| axon | |
| dendrites and soma | |
| all over the plasma membrane of the neuron |
Homework Answers
all over the plasma membrane of the neuron.
Neurons contain N or P/Q -type calcium channels. Though they are present throught the neuron, their distibution greatley varies with the region. They are mostly concentrated in the nerve terminals. Depolarization potential causes the opening of voltage gated calcium channels at the nerve terminals and influx calcium ions (exocytosis) causes release of neurotransmitter from the synaptic vesicles.
Some of the calcium channels are laos located at the bas eof dendrites which are responsible for dendritic calcium spikes during action potential bursts.
Add Answer to:
Voltage-gated calcium channels are localized to which part of
the neuron?
axon terminal
axon
dendrites and...
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...
During graded potential on the soma and dendrites, which of these channels are open? (Mark all...
During graded potential on the soma and dendrites, which of these channels are open? (Mark all that apply) 1. Na/K Pump 2. Voltage gated potassium channels 3. Ligand gated sodium channels 4. Voltage gated calcium channels
A mutation causes the incorporation of fewer voltage-gated sodium channels into the membrane of a neuron....
A mutation causes the incorporation of fewer voltage-gated sodium channels into the membrane of a neuron. a) What effect will this mutation have on synaptic potentials if this neuron receives excitatory input? b) What effect will this mutation have in the axon hillock area?
The reciving region of the neuron is the dendrites axon terminal O axon O cell body
The reciving region of the neuron is the dendrites axon terminal O axon O cell body
neuronal action potential reaches the axon terminal of neuron _______ are released from the axon terminal...
neuronal action potential reaches the axon terminal of neuron _______ are released from the axon terminal by ______ _______ diffuse across the _______ _______ and bind to ______ on the postsynaptic membrane of neuron, 2) generating an excitatory local potential, if the neuron is stimulated enough time, the excitatory local potentials _______ and spread through the neuron's plasma membrane toward the axon, when the trigger zone is deploarized to ______, an ______ is generated
3. Many neurons contain "delayed K channels". Like voltage-gated Nat channels, these voltage-gated K+ channels open in response to a rise in membrane potential and then undergo inactivati...
3. Many neurons contain "delayed K channels". Like voltage-gated Nat channels, these voltage-gated K+ channels open in response to a rise in membrane potential and then undergo inactivation. However, opening of the voltage-gated K channels lags behind opening of the voltage-gated Na channels. a) Why does neuronal function require the voltage-gated K channels to open more slowly than the voltage-gated Na channels? b) Compared to a neuron that lacks voltage-gated K channels, what differences would you expect in the shape...
Which choice represents transport proteins in a neuron? a. Voltage-gated channels and passive transporters b. Passive...
Which choice represents transport proteins in a neuron? a. Voltage-gated channels and passive transporters b. Passive transporters and sodium-potassium cotransporters c. Sodium-potassium cotransporters, passive transporters, and voltage-gated channels d. Voltage-gated channels and passive transporters e. Sodium-potassium cotransporters and voltage-gated channels
Action potentials do not occur in the soma of a neuron because a.it lacks voltage gated...
Action potentials do not occur in the soma of a neuron because a.it lacks voltage gated sodium channels b.it lacks leaky potassium channels c.it lacks leaky sodium channels d.it lacks chemically gated channels
Which of the following statement(s) regarding gated channels is/are FALSE? Gated channels facilitate the passage of...
Which of the following statement(s) regarding gated channels is/are FALSE? Gated channels facilitate the passage of ions such as Cl- and Na+ across the plasma membrane. Gated channels open or close in response to a signal. Gated channels facilitate the passage of small, nonpolar molecules such as O2 across the plasma membrane. Gated channels allow for the passive movement of substances across the plasma membrane in a process called facilitated diffusion. Gated channels facilitate the passage of small, nonpolar molecules...
1. What channels or carriers are NOT found at the axon to the axon terminal? Select...
1. What channels or carriers are NOT found at the axon to the axon terminal? Select one: a. Na+ leaky channels b. Cl- gated channels c. Na+ gated channels d. Na+-K+ ATPase e. None of the above 2. What is TRUE about action potential in the neuron? There may be more than one answer. Select one or more: a. At resting membrane potential (-70mV), the inactivation gate of the Na+ channel is closed while the activation gate is opened. b....
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...
The reciving region of the neuron is the dendrites axon terminal O axon O cell body
3. Many neurons contain "delayed K channels". Like voltage-gated Nat channels, these voltage-gated K+ channels open in response to a rise in membrane potential and then undergo inactivation. However, opening of the voltage-gated K channels lags behind opening of the voltage-gated Na channels. a) Why does neuronal function require the voltage-gated K channels to open more slowly than the voltage-gated Na channels? b) Compared to a neuron that lacks voltage-gated K channels, what differences would you expect in the shape...
Which of the following statement(s) regarding gated channels is/are FALSE? Gated channels facilitate the passage of ions such as Cl- and Na+ across the plasma membrane. Gated channels open or close in response to a signal. Gated channels facilitate the passage of small, nonpolar molecules such as O2 across the plasma membrane. Gated channels allow for the passive movement of substances across the plasma membrane in a process called facilitated diffusion. Gated channels facilitate the passage of small, nonpolar molecules...
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