Can someone please help me with these?
I also attached a document that is the same thing if that is easier for you.
Part A
What effect did increasing the extracellular potassium have on the resting membrane potential?
What effect did increasing the extracellular potassium have on the resting membrane potential?
The resting membrane potential became more negative.
The resting membrane potential did not change.
The resting membrane potential disappeared.
The resting membrane potential became less negative.
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Part B
What effect did decreasing the extracellular sodium have on the resting membrane potential?
What effect did decreasing the extracellular sodium have on the resting membrane potential?
The resting membrane potential became less negative.
The resting membrane potential disappeared.
Only a small change occurred, because the resting neuron is not very permeable to sodium.
Only a small change occurred, because the sodium channels were mostly open.
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Part C
The channels that provide for the movement of potassium in the resting neuron are _______.
The channels that provide for the movement of potassium in the resting neuron are _______.
leakage
leakage and chemically gated.
chemically gated
voltage gated
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Part D
Establishing the resting membrane potential requires energy through the use of the _______.
Establishing the resting membrane potential requires energy through the use of the _______.
sodium leakage channels
sodium-glucose pump
potassium-glucose pump
sodium-potassium pump
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Part A
A nerve is _______.
A nerve is _______.
a bundle of axons
another term for a neuron
another term for nerve fiber
a cluster of cell bodies
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Part B
The region on the neuron where action potentials are generated is called the ______.
The region on the neuron where action potentials are generated is called the ______.
depolarization zone
dendrite
trigger zone
stimulator zone
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Part C
In this simulation, ___________________ will be used to stimulate the axon.
In this simulation, ___________________ will be used to stimulate the axon.
voltage
light
heat
chemicals
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Part D
We describe the regeneration of the action potential down the membrane of the axon of the neuron as _______.
We describe the regeneration of the action potential down the membrane of the axon of the neuron as _______.
conduction
hyperpolarization
propagation
conduction or propagation
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Part A
A single action potential is described as _______.
A single action potential is described as _______.
not graded
graded by the frequency of the stimulus
graded by the intensity of the stimulus
graded by the functional area involved
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Part B
A suprathreshold stimulus results in _______.
A suprathreshold stimulus results in _______.
the disappearance of action potentials
fewer action potentials
larger action potentials
more action potentials
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Part C
A depolarizing synaptic potential is also known as _______.
A depolarizing synaptic potential is also known as _______.
an inhibitory postsynaptic potential
a hyperpolarizing postsynaptic potential
an excitatory presynaptic potential
an excitatory postsynaptic potential
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Part D
The stimulus for graded potentials includes _______.
The stimulus for graded potentials includes _______.
neurotransmitter
sensory stimuli and neurotransmitter
sensory stimuli
voltage
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Part A
Which of the following statements about receptor potentials is FALSE?
Which of the following statements about receptor potentials is FALSE?
They can trigger an action potential.
The receptor potential is carried by neuroglia.
The receptor proteins respond to stimuli.
Odor molecules can act as stimuli.
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Part B
Which of the following is NOT a functional region of a neuron?
Which of the following is NOT a functional region of a neuron?
conducting region
medullary region
receiving region
secretory region
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Part C
The conducting region of the neuron is the _______.
The conducting region of the neuron is the _______.
cell body
axon
dendrite
axon terminal
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Part D
The typical concentration of sodium is _______.
The typical concentration of sodium is _______.
higher than potassium intracellularly.
lower than potassium extracellularly.
lower than potassium intracellularly.
the same as potassium intracellularly.
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Part E
Which of the following describes a change from the resting membrane potential?
Which of the following describes a change from the resting membrane potential?
a receptor potential
an action potential
a synaptic potential
a receptor potential, a synaptic potential or an action potential
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Part A
The minimum voltage that is required to generate an action potential is called the _______.
The minimum voltage that is required to generate an action potential is called the _______.
propagation voltage
threshold voltage
depolarization voltage
trigger voltage
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Part B
Increasing the voltage resulted in which of the following?
Increasing the voltage resulted in which of the following?
no change to the action potential
an increase in the rate of propagation of the action potential
an increase in the size of the action potential
a decrease in the rate of propagation of the action potential
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Part C
An axon that is more negative than the resting membrane potential is said to be _______.
An axon that is more negative than the resting membrane potential is said to be _______.
depolarized
graded
at threshold
hyperpolarized
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Part D
If an increase in extracellular potassium depolarizes a neuron, which of the following would be correct?
If an increase in extracellular potassium depolarizes a neuron, which of the following would be correct?
It would change the membrane potential to a less negative value.
It would decrease the flow of sodium out of the cell.
It would change the membrane potential to a more negative value.
It would increase the flow of sodium out of the cell.
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Part A
A weak, subthreshold stimulus will result in _______.
A weak, subthreshold stimulus will result in _______.
an action potential at the receiving end of the neuron
a small depolarization at the receiving end of the neuron
release of neurotransmitter at the axon terminal of the sensory neuron
a small depolarization at the receiving end of the interneuron
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Part B
Which stimulus was at or above threshold?
Which stimulus was at or above threshold?
moderate
weak
strong
the moderate and strong stimuli
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Part C
Increasing the strength of the stimulus applied to the sensory receptor increased _______.
Increasing the strength of the stimulus applied to the sensory receptor increased _______.
the frequency of action potentials in the sensory neuron, the amount of neurotransmitter released at the axon terminal of the sensory neuron and the frequency of action potentials in the interneuron
the amount of neurotransmitter released at the axon terminal of the sensory neuron
the frequency of action potentials in the sensory neuron
the frequency of action potentials in the interneuron
the frequency of action potentials in the sensory neuron and the amount of neurotransmitter released at the axon terminal of the sensory neuron
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Part D
An excitatory postsynaptic potential occurs _______.
An excitatory postsynaptic potential occurs _______.
at the receiving end of the sensory neuron
at the axon terminal of the interneuron
at the axon terminal of the sensory neuron
at the receiving end of the interneuron
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