Neuroscience: Electrical Signals of Nerve Cells ; Questions & Answers
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Neuroscience: Electrical Signals of Nerve Cells
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Neuroscience: Electrical Signals Of Nerve Cells
1. Which type(s) of electrical signals occur(s) within the neural circuit for a spinal reflex?
a. Receptor potential only
b. Action potential only
c. Synaptic potential only
d. Receptor potential and action potential only
e. Receptor potential, synaptic potential, and action potential
Answer:...
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Neuroscience: Electrical Signals of Nerve Cells
Questions & Answers
1. Which type(s) of electrical signals occur(s) within the neural circuit for a spinal reflex?
a. Receptor potential only
b. Action potential only
c. Synaptic potential only
d. Receptor potential and action potential only
e. Receptor potential, synaptic potential, and action potential
Answer: e
Textbook Reference: Electrical Signals of Nerve Cells
2. The resting membrane potential typically ranges from _______ to _______.
a. –90 mV; 90 mV
b. 40 mV; 90 mV
c. 40 V; 90 V
d. –40 mV; –90 mV
e. 0 mV; 90 mV
Answer: d
Textbook Reference: Electrical Signals of Nerve Cells
3. An action potential occurs if current injected into a neuron _______ the neuron to reach _______
potential.
a. depolarizes; synaptic
b. hyperpolarizes; synaptic
c. depolarizes; threshold
d. hyperpolarizes; threshold
e. hyperpolarizes; resting
Answer: c
, Textbook Reference: Electrical Signals of Nerve Cells
4. How will a neuron respond to an injection of negative current?
a. It will become hyperpolarized.
b. It will have a positive electrical response.
c. It will generate a single action potential.
d. It will generate multiple action potentials.
e. It will reach the threshold potential.
Answer: a
Textbook Reference: Electrical Signals of Nerve Cells
5. The amplitude of the action potential of a given neuron is
a. larger in response to depolarizing currents of greater magnitude.
b. dependent on the magnitude of the sensory stimulus.
c. related to the number of synapses on the neuron.
d. smaller if the resting potential of the neuron is lower.
e. always the same.
Answer: e
Textbook Reference: Electrical Signals of Nerve Cells
6. Which stimulus is most likely to evoke an action potential?
a. Small hyperpolarizing current pulse
b. Large hyperpolarizing current pulse
c. Small depolarizing current pulse
d. Large depolarizing current pulse
e. Microelectrode insertion
Answer: d
Textbook Reference: Electrical Signals of Nerve Cells
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