Review Questions
For a neuron to fire an action potential, its membrane must reach ________.
- hyperpolarization
- the threshold of excitation
- the refractory period
- inhibitory postsynaptic potential
Hint:
B
After an action potential, the opening of additional voltage-gated ________ channels and the inactivation of sodium channels, cause the membrane to return to its resting membrane potential.
- sodium
- potassium
- calcium
- chloride
Hint:
B
What is the term for protein channels that connect two neurons at an electrical synapse?
- synaptic vesicles
- voltage-gated ion channels
- gap junction protein
- sodium-potassium exchange pumps
Hint:
C
Which of the following molecules is not involved in the maintenance of the resting membrane potential?
- potassium cations
- ATP
- voltage-gated ion channels
- calcium cations
Hint:
D