BME 235 EXAM 2 2024/2025 WITH 100% ACCURATE
SOLUTIONS
T/F in a myelinated fiber, only the initial segment in the trigger zone has voltage-regulated channels -
Precise Answer ✔✔T
T/F in a myelinated fiber, only the initial segment in the trigger zone has voltage-regulated channels -
Precise Answer ✔✔T
In a neuron, the opening of sodium gates typically leads to _______.
1. hyperpolarization of the plasma membrane
2. depolarization of the plasma membrane
3. repolarization of the plasma membrane
4. drifting of plasma membrane voltage toward a more negative value
5. plasma membrane voltage returning to the resting membrane potential - Precise Answer ✔✔2
In a neuron, the opening of sodium gates typically leads to _______.
1. hyperpolarization of the plasma membrane
2. depolarization of the plasma membrane
3. repolarization of the plasma membrane
,4. drifting of plasma membrane voltage toward a more negative value
5. plasma membrane voltage returning to the resting membrane potential - Precise Answer ✔✔2
Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?
1. inflow of sodium
2. inflow of calcium
3. outflow of chloride
4. inflow of potassium
5. inflow of chloride - Precise Answer ✔✔5
Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?
1. inflow of sodium
2. inflow of calcium
3. outflow of chloride
4. inflow of potassium
5. inflow of chloride - Precise Answer ✔✔5
Local potential are _______ meaning they vary in magnitude according to the strength of the stimulus -
Precise Answer ✔✔graded
Local potential are _______ meaning they vary in magnitude according to the strength of the stimulus -
Precise Answer ✔✔graded
when the voltage of a plasma membrane shifts from +35 mV toward 0mV, the cell is _______
options: de, re, or hyper polarizing - Precise Answer ✔✔repolarizing
, when the voltage of a plasma membrane shifts from +35 mV toward 0mV, the cell is _______
options: de, re, or hyper polarizing - Precise Answer ✔✔repolarizing
during the absolute refractory period which of the following is true?
1. the signal grows weaker with distance
2. no stimulus of any strength will trigger a new action potential
3. if a neuron reaches threshold, the action potential goes to completion
4. the neuron fires at its maximum voltage if a stimulus depolarizes the neuron to threshold
5. it is possible to trigger a new action potential, but only with an unusually strong stimulus - Precise
Answer ✔✔2
during the absolute refractory period which of the following is true?
1. the signal grows weaker with distance
2. no stimulus of any strength will trigger a new action potential
3. if a neuron reaches threshold, the action potential goes to completion
4. the neuron fires at its maximum voltage if a stimulus depolarizes the neuron to threshold
SOLUTIONS
T/F in a myelinated fiber, only the initial segment in the trigger zone has voltage-regulated channels -
Precise Answer ✔✔T
T/F in a myelinated fiber, only the initial segment in the trigger zone has voltage-regulated channels -
Precise Answer ✔✔T
In a neuron, the opening of sodium gates typically leads to _______.
1. hyperpolarization of the plasma membrane
2. depolarization of the plasma membrane
3. repolarization of the plasma membrane
4. drifting of plasma membrane voltage toward a more negative value
5. plasma membrane voltage returning to the resting membrane potential - Precise Answer ✔✔2
In a neuron, the opening of sodium gates typically leads to _______.
1. hyperpolarization of the plasma membrane
2. depolarization of the plasma membrane
3. repolarization of the plasma membrane
,4. drifting of plasma membrane voltage toward a more negative value
5. plasma membrane voltage returning to the resting membrane potential - Precise Answer ✔✔2
Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?
1. inflow of sodium
2. inflow of calcium
3. outflow of chloride
4. inflow of potassium
5. inflow of chloride - Precise Answer ✔✔5
Which of the following will cause the plasma membrane to hyperpolarize when at its RMP?
1. inflow of sodium
2. inflow of calcium
3. outflow of chloride
4. inflow of potassium
5. inflow of chloride - Precise Answer ✔✔5
Local potential are _______ meaning they vary in magnitude according to the strength of the stimulus -
Precise Answer ✔✔graded
Local potential are _______ meaning they vary in magnitude according to the strength of the stimulus -
Precise Answer ✔✔graded
when the voltage of a plasma membrane shifts from +35 mV toward 0mV, the cell is _______
options: de, re, or hyper polarizing - Precise Answer ✔✔repolarizing
, when the voltage of a plasma membrane shifts from +35 mV toward 0mV, the cell is _______
options: de, re, or hyper polarizing - Precise Answer ✔✔repolarizing
during the absolute refractory period which of the following is true?
1. the signal grows weaker with distance
2. no stimulus of any strength will trigger a new action potential
3. if a neuron reaches threshold, the action potential goes to completion
4. the neuron fires at its maximum voltage if a stimulus depolarizes the neuron to threshold
5. it is possible to trigger a new action potential, but only with an unusually strong stimulus - Precise
Answer ✔✔2
during the absolute refractory period which of the following is true?
1. the signal grows weaker with distance
2. no stimulus of any strength will trigger a new action potential
3. if a neuron reaches threshold, the action potential goes to completion
4. the neuron fires at its maximum voltage if a stimulus depolarizes the neuron to threshold
