lecture 5

Question 1

At a synapse, the neuron sending the signal towards the synapse is called the _______ neuron.

Answer 1

presynaptic

Question 2

The junction between a stimulating neuron and the next neuron or muscle fiber is known as a(n)

Answer 2

synapse

Question 3

what does the synapse consist of

Answer 3

presynaptic and post synaptic cell membranes separated by a synaptic cleft

Question 4

What ion must flow into the presynaptic cell in order for it to release neurotransmitter?

Answer 4

calcium

Question 5

After Serotonin has been released, some of it is returned to the presynaptic cell by

Answer 5

serotonin reuptake transporters in the membrane of the presynaptic cell

Question 6

As Ca++ ions enter the presynaptic membrane _____ of neurotransmitters occurs.

Answer 6

exocytosis

Question 7

An excitatory neurotransmitter ______ the postsynaptic membrane.

Answer 7

depolarizes

Question 8

Diffusion, enzymatic degradation, and uptake by cells are all ways to

Answer 8

remove a neurotransmitter

Question 9

In the process of spatial summation, _____ are added together and _____ are subtracted from that total to determine whether _____ will be created at the trigger zone of the postsynaptic neuron.

Answer 9

EPSPs; IPSPs; action potentials

Question 10

In temporal summation, a single presynaptic neuron stimulates the creation of action potentials in a postsynaptic neuron when it

Answer 10

fires at a fast enough rate that the sum EPSPs in the postsynaptic neuron moves above threshold

Question 11

What neurotransmitters are used in virtually all of the inhibitory synapses found in the spinal cord?

Answer 11

GABA and glycine