1. What triggers the opening of each of the different channels: ligand-gated K+ channels, ligand-gated Na+...
1. What triggers the opening of each of the different channels: ligand-gated K+ channels, ligand-gated Na+ channels, ligand-gated Cl- channels, voltage-gated Na+ channels, voltage-gated K+ channels, voltage-gated Ca2+ channels.
2. What happens to membrane potential in the immediate area where the channel is located when the channel opens and ions flow through?
3. Since graded and action potentials happen in different locations on the neuron, explain what has to happen to link these different events together.
Homework Answers
- As soon as the neurotransmitter binds to the sodium channels (ligand gated) the channels open and lead to influx of the sodium ions. As, the depolarisation progresses, the voltage gated sodium channels receive a voltage specific threshold opening and open to produce more influx of sodium inside the cell membrane. There is presence of resting type of potassium channels which are always open. The ligand gated chloride channels open in response to a inhibitory neurotransmitter leading to chloride movement to prevent transmission of stimulus. As the stimulus progresses, the potassium channels at the end of depolarisation start opening due to changing voltage to start the process of re-polarisation. The voltage gated calcium channels work in a similar fashion as voltage gated sodium channels.
Add Answer to:
1. What triggers the opening of each of the different channels:
ligand-gated K+ channels, ligand-gated Na+...
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...
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...
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....
What is a resting potential? Is it positive or negative? The resting potential is mainly due...
What is a resting potential? Is it positive or negative? The resting potential is mainly due to the main _____-charged large molecules stuck inside the neuron. The Na+/K+ pump pushes Na+ _____ of the cell and K+ ____ of the cell (in or out for each ion) Where is K+ concentrated, inside or outside of the neuron? Where is Na+ concentrated, inside or outside of the neuron? The action potential starts with an rise in membrane voltage. This is due...
what do the ligand gated cation channels do that are located on the sarcolemma? what is...
what do the ligand gated cation channels do that are located on the sarcolemma? what is the motor end plate? what direction do the ions move? (Na and K) how is the resting membrane potential restored?
Q2. The Na+/K+ pump and voltage gated K+ channels both transport K+ across the membrane. A)...
Q2. The Na+/K+ pump and voltage gated K+ channels both transport K+ across the membrane. A) Compare and contrast these two mechanisms for K+ transport indicating important functional and structural differences. B) Describe the process for putting a voltage gated K+ channel in the membrane starting at the ribosome and ending at the plasma membrane.
1. The adrenal medulla is excited by the parasympathetic preganglionic neuron during times of immediate stress....
1. The adrenal medulla is excited by the parasympathetic preganglionic neuron during times of immediate stress. (true or false) 2. The activation gate of the voltage-gated sodium channel closes after a certain amount of time regardless of the membrane potential. (true or false) 3. Acetylcholine binds to voltage-gated sodium ion channels to initiate a graded potential. (true or false) 4. Action potentials can occur in the axon terminal. (true or false) 5. Opening a chloride ion channel in the cell...
Ion channels are involved with generating action potentials. Below is an electrical profile of a neuronal action potent...
Ion channels are involved with generating action potentials. Below is an electrical profile of a neuronal action potential. In the boxes below list whether the channels are all open, all closed, opening, or closing at each of the letters shown in the profile. (Opening implies that channels were "all closed" and are moving toward their "all open" state. Closing indicates the opposite. Use the term "closing" to represent the inactivated state of the Na+ channels.) (7 pts) 1. Channel Type...
Voltage-gated Na channels exist in three distinct conformations in axons because Answers A-D A they assume...
Voltage-gated Na channels exist in three distinct conformations in axons because Answers A-D A they assume an inactivated conformation shortly after opening, which ensures that the action potential cannot move backwards toward the cell body. B they change conformation when binding Nat and transporting it to the opposite side of the membrane before releasing it outside the cell. C they respond to ligand binding, mechanical stress, or changes in voltage. D they assume different conformations as ATP is bound and...
8. Indicate whether the following lead to Depolarization OR Hyperpolarization (1) Opening of K+ channels on...
8. Indicate whether the following lead to Depolarization OR Hyperpolarization (1) Opening of K+ channels on the post-synaptic membrane. (2) Opening of Cl- channels on the post-synaptic membrane. (3) Opening of Na+ channels on the post-synaptic membrane. 9. Indicate whether the following are Graded OR All-or-None responses. (1) Local potential (2) Action potential (3) EPSP (4) IPSP (5) End Plate Potential 10. True or False: Temporal summation of IPSPs increases the chance of having an action potential.
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...
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...
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....
Q2. The Na+/K+ pump and voltage gated K+ channels both transport K+ across the membrane. A) Compare and contrast these two mechanisms for K+ transport indicating important functional and structural differences. B) Describe the process for putting a voltage gated K+ channel in the membrane starting at the ribosome and ending at the plasma membrane.
Ion channels are involved with generating action potentials. Below is an electrical profile of a neuronal action potential. In the boxes below list whether the channels are all open, all closed, opening, or closing at each of the letters shown in the profile. (Opening implies that channels were "all closed" and are moving toward their "all open" state. Closing indicates the opposite. Use the term "closing" to represent the inactivated state of the Na+ channels.) (7 pts) 1. Channel Type...
Voltage-gated Na channels exist in three distinct conformations in axons because Answers A-D A they assume an inactivated conformation shortly after opening, which ensures that the action potential cannot move backwards toward the cell body. B they change conformation when binding Nat and transporting it to the opposite side of the membrane before releasing it outside the cell. C they respond to ligand binding, mechanical stress, or changes in voltage. D they assume different conformations as ATP is bound and...
8. Indicate whether the following lead to Depolarization OR Hyperpolarization (1) Opening of K+ channels on the post-synaptic membrane. (2) Opening of Cl- channels on the post-synaptic membrane. (3) Opening of Na+ channels on the post-synaptic membrane. 9. Indicate whether the following are Graded OR All-or-None responses. (1) Local potential (2) Action potential (3) EPSP (4) IPSP (5) End Plate Potential 10. True or False: Temporal summation of IPSPs increases the chance of having an action potential.
Most questions answered within 3 hours.
-
Select a target behavior from your list of potential target
behaviors. State your target behavior in...
asked 3 minutes ago -
Guns make a unique marking on the bullets they fire and their
shell casings. These markings...
asked 6 minutes ago -
Bourque Enterprises is considering a new project. The project
will generate sales of $1.5 million, $2.2...
asked 18 minutes ago -
data structures c++
please implement the QuickSort algorithm as a C++ function. Use
it to sort...
asked 18 minutes ago -
A young investment manager tells his client that the probability
of making a positive return with...
asked 21 minutes ago -
Calculate the final discrete available-to-promise quantity for
Week 1 using the following table.
Weeks
1
2...
asked 53 minutes ago -
Bob is gambling in the casino. The probability that he will win
nothing is 0.2. The...
asked 2 hours ago -
A free electron and a free proton are exactly 0.70 cm apart.
A)
Find the magnitude...
asked 2 hours ago -
Identify and Describe the major sources of U.S law. Provide a
sport-related example of each.
asked 2 hours ago -
NASA's Ames Research Center in Mountain View, California, houses
a 20g centrifuge used to conduct research...
asked 3 hours ago -
I want a python code using recursion ONLY.
I cannot use any loops, dictionaries or modules....
asked 3 hours ago -
Tobin Supplies Company expects sales next year to be $450,000.
Inventory and accounts receivable will increase...
asked 4 hours ago