Exam 7: The Nervous System: Neurons and Synapses

What process occurs when glutamate-releasing presynaptic neurons stimulate postsynaptic release of endocannabinoids that acts as retrograde neurotransmitters?

Temporal summation

Cocaine blocks the release of dopamine,norepinephrine,and serotonin.

An axon will depolarize only if the membrane potential reaches between -70mV and -55mV.This follows the

The __________ dopamine system may be involved in emotional reward and drug addiction.

The binding of a neurotransmitter to its receptor protein causes ion channels to open in the post-synaptic membrane.What type of gates are these?

During an action potential

The myelin sheaths of PNS neurons are produced by

Acetylcholine

Which of the following is NOT true of EPSPs?

The membrane of resting nerve cells is more permeable to ____________ ions than ____________ ions.

Serotonin is derived from the amino acid tryptophan and is an important neurotransmitter.

Which of the following are natural analgesics?

Anterograde transport uses dynein molecular motor proteins.

The blood-brain barrier prevents hydrophobic molecules from diffusing into the brain.

Botulism toxin prevents release of ACh,causing

Neurotransmitters

Relaxation of cerebral blood vessels would be stimulated by excessive ________ activity.

Retrograde transport

Serotonin is degraded in presynaptic neurons by monoamine oxidase.