1.A stronger stimulus to a neuron results in ________.
A. larger voltage changes in graded potentials and greater frequency of action potentials produced in response
B. greater frequency of graded potentials and larger voltage changes in the action potentials produced in response
C. larger voltage changes in the graded potentials, but no changes in action potentials
D. larger voltage changes in both graded and action potentials
E. larger voltage changes in graded potentials but smaller action potentials
2. Why is it more difficult to fire an action potential when the interval between stimuli decreases?
A. because sodium is flowing out of the cell
B. because potassium is flowing into the cell
C. because some sodium channels may still be in an inactivated state
D. because chloride is flowing into the cell
E. because chloride is flowing out of the cell
3. As an action potential zips down an axon,
A. voltage gated potassium channels open first followed by voltage-dependent sodium channels
B. voltage- gated sodium channels ahead of the wave and not yet activated are influenced by the depolarizing electrical field of other nearby sodium channels
C. voltage-gated potassium channels ahead of the wave and not yet activated are influenced by the depolarizing electrical field of nearby sodium channels
D. leak channels are opened by the wave of electricity passing along the axon
E. B and C
1.A stronger stimulus to a neuron results in ________.
A. larger voltage changes in graded potentials and greater frequency of action potentials produced in response
B. greater frequency of graded potentials and larger voltage changes in the action potentials produced in response
C. larger voltage changes in the graded potentials, but no changes in action potentials
D. larger voltage changes in both graded and action potentials
E. larger voltage changes in graded potentials but smaller action potentials
2. Why is it more difficult to fire an action potential when the interval between stimuli decreases?
A. because sodium is flowing out of the cell
B. because potassium is flowing into the cell
C. because some sodium channels may still be in an inactivated state
D. because chloride is flowing into the cell
E. because chloride is flowing out of the cell
3. As an action potential zips down an axon,
A. voltage gated potassium channels open first followed by voltage-dependent sodium channels
B. voltage- gated sodium channels ahead of the wave and not yet activated are influenced by the depolarizing electrical field of other nearby sodium channels
C. voltage-gated potassium channels ahead of the wave and not yet activated are influenced by the depolarizing electrical field of nearby sodium channels
D. leak channels are opened by the wave of electricity passing along the axon
E. B and C
Related textbook solutions
Related questions
3. Which of the following is TRUE about a motor neuron?
| It passes information to another motor neuron. | ||
| It passes information to another neuron. | ||
| It stimulates cells associated with muscles or glands. | ||
| It cannot generate an action potential. |
2. Choose the immediate event that needs to occur for a nerve to fire an action potential.
| Voltage-gated potassium ion channels need to open. | ||
| A threshold potential will need to be reached. | ||
| Depolarization will need to be happen. | ||
| Voltage-gated sodium ion channels need to close. |
1. Choose the TRUE statement with respect to axons and/or dendrites.
| Dendrite is the location that a neurotransmitter moves into the synamptic cleft. | ||
| Action potentials travel along the axon of a neuron. | ||
| A neuron will typically have more axons than dendrites. | ||
| More than one is correct |
