Quiz 2 - Ch 2

Question 1

transmission at synapses occurs in the same way as does transmission along axons

Answer 1

false

Question 2

at synapses, the cell that receives the message is called the presynaptic neuron

Answer 2

false

Question 3

chemical communication between neurons is faster than electrical communication along axons

Answer 3

false

Question 4

the amount of temporal summation depends on the rate of stimulation

Answer 4

true

Question 5

inhibitory synapses interrupt action potentials by hyperpolarizing the postsynaptic cell

Answer 5

false

Question 6

most of the known neurotransmitters are synthesized from amino acids

Answer 6

true

Question 7

charles Sherrington would most likely agree with which statement about reflexes?

Answer 7

repeated stimuli occurring within a brief time can have a cumulative effect

Question 8

temporal summation is most likely to occur when there is ____

Answer 8

rapid succession of subthreshold excitation

Question 9

an IPSP is produced by the selective flow of _____

Answer 9

potassium out of the cell or chloride into the cell

Question 10

COMT and MAO are ____

Answer 10

enzymes that convert catecholamines into inactive chemicals

Question 11

cocaine belongs to a class of drugs called __

Answer 11

stimulants

Question 12

the difference between a hormone and a neurotransmitter is that neurotransmitters are chemicals used by the nervous system that allows individual neurons to send messages. In contrast, hormones are secreted by the endocrine system and travel (usually via the bloodstream) to other parts of the body to exert their effects

Answer 12

true

Question 13

one advantage of nitric oxide as a neurotransmitter is that it ____

Answer 13

can be made by neurons efficiently

Question 14

which gland is involved in the secretion of oxytocin?

Answer 14

posterior pituitary

Question 15

reuptake is an alternative to which other process?

Answer 15

breaking down neurotransmitters via an enzymatic process

Question 16

transporter proteins transport neurotransmitters ____

Answer 16

back into the presynaptic neuron

Question 17

which gland is involved in the secretion of vasopressin?

Answer 17

posterior pituitary

Question 18

prior to their release, neurotransmitters are typically stored in _____

Answer 18

vesicles in the presynaptic neuron

Question 19

vesicles are located ____

Answer 19

in presynaptic terminals

Question 20

the neurotransmitters are removed from the synapse, but some neurotransmitters like acetylcholine are left. Other neurotransmitters are taken back up through specialized membrane proteins called transporters. Finally, other neurotransmitters like the neuropeptides diffuse away from the synapse.

Answer 20

false