Quiz 7
An EPSP is a(n) ____. A. graded depolarization B. graded hyperpolarization C. depolarization with a rebounding hyperpolarization D. action potential in a reflex arc
A
An IPSP represents ____. A. a gap in a myelin sheath B. a subthreshold depolarization C. a temporary hyperpolarization D. the location where a dendrite branches
C
Temporal summation most likely occurs with ____. A. infrequent, subthreshold excitation B. infrequent, inhibitory stimuli C. rapid succession of subthreshold excitation D. rapid succession of stimuli that each exceed threshold
C
Which of the following connections has the greatest influence on the activity of the postsynaptic axon? A. Dendro-dendritic synapses B. Axo-somatic synapses C. Axo-axonic synapses D. Axo-dendritic synapses
C
Which of the following presynaptic events are presented in correct chronological order? A. Calcium ion influx, action potential reaches axon terminal, vesicles fuse with membrane, diffusion of neurotransmitter B. Action potential reaches axon terminal, calcium ion channels open, neurotransmitter diffusion, vesicles fuse with membrane C. Action potential reaches axon terminal, calcium ion channels open, vesicles fuse with membrane, diffusion of neurotransmitter D. Vesicles fuse with membrane, calcium ion influx, action potential reaches axon terminal, membrane depolarization
C
_______ seizures do not involve the entire brain. A. Grand mal B. Kindling C. Complex partial D. Petit mal
C
A ligand of the acetylcholine receptor is a substance that A. degrades it. B. facilitates its release. C. stimulates its synthesis. D. binds to it.
D
Postsynaptic potentials are a type of A. resting potential. B. action potential. C. digital event. D. graded potential.
D
Spatial summation refers to ____. A. a decrease in responsiveness after repeated stimulation B. an increase in the strength of action potentials after repeated stimulation C. multiple weak stimulations that occur in rapid succession D. multiple weak stimulations that occur at the same time
D
_______ was a pioneer in mapping the brain through electric stimulation. A. Eric Kandel B. Hughlings Jackson C. Donald Hebb D. Wilder Penfield
D