24.Which of the following statements does NOT correctly describe the repolarization of a neuron?
Select one:
a. The neuron becomes more polarized and more negatively charged than its original resting membrane potential.
b. The sodium and potassium channels open, allowing the positive ions to move out of the cell.
c. The potassium channels are slower to open, allowing the potassium ions to leave after depolarization.
d. The potassium ions leave the cell, thereby returning the neuron to its resting potential.
25.Which of the following choices correctly fills in the blanks?
After repolarization, the sodium ions are found _____A_______ the neuron and the potassium ions are found ______B_____ of the neuron. This reversal of ions can be fixed by the action of ____________C______________. ____D____ sodium ions are taken out and ___E____ potassium ions are brought in.
Select one:
a.
A B C D E
inside outside Na+/K+ exchange pump
three two
b.
A B C D E
outside inside Na+/K+ exchange pump
two three
c.
A B C D E
inside outside voltage gated channels
three two
d.
A B C D E
outside inside voltage gated channels
two three
31.Which of the following answers correctly identifies the number showing the axon terminal in the diagram and gives the axon terminal function?
Select one:
a. 1; production of action potential
b. 5; production of serotonin
c. 1; production of serotonin
d. 5; production of action potential
38.Our nervous system produces an inhibitory neurotransmitter that blocks the release of dopamine. Anandamide is a naturally occurring molecule that blocks the release of this inhibitory neurotransmitter.
THC, the active component in marijuana, looks similar to anandamide and binds to the same receptors as anandamide. Anandamide breaks down faster than THC in the synapse.
Which of the following is the effect of THC on the synaptic transmission in our central nervous system?
Select one:
a. THC prevents the reuptake of dopamine neurotransmitters from the synapse.
b. THC decreases the production and release of dopamine into the synapse.
c. THC blocks the activity of the enzymes that break down the dopamine in the synapse.
d. THC prevents the release of the inhibitory neurotransmitters.
41.Which of the following rows correctly identifies the synapse and the method of transmission a nerve impulse travels?
Select one:
a.
Synapse Method of Transmission
1 Neurotransmitters
b.
Synapse Method of Transmission
2
Sodium and potassium ions
c.
Synapse Method of Transmission
1 Sodium and potassium ions
d.
Synapse Method of Transmission
2 Neurotransmitters