Synapse

Question 1

structure electrical synapse

Answer 1

gap junction

Question 2

gap junction, what is permeability regulated by?

Answer 2

cytosolic concentration of free ca2+ or cytosolic ph

Question 3

gap junction, what kind of complex does it have?

Answer 3

hexameric

Question 4

6 connexins form a

Answer 4

connexon

Question 5

electrical synapse also permit

Answer 5

synchronization of activity

Question 6

synchronization, in neurons that have a

Answer 6

similar function

Question 7

gap junctions, permits movement of ?

Answer 7

atp and second messengers

Question 8

chemical neurotransmitters are? and eg?

Answer 8

small molecules in small clear vesicles

ach, gaba, glutamate, glycine

Question 9

chemical neurotransmitters, large molecules in dense core vesicles

Answer 9

neuropeptides

Question 10

release of chemical neurotransmitters is

Answer 10

ca dependent

Question 11

neural basis of learning and memory, 2 changes

Answer 11

functioning of neurons in brain could change

structure of neurons could change

Question 12

electrical properties

Answer 12

instantaneous
no loss of signal
similar time course

Question 13

chemical properties

Answer 13

delayed
signal greatly reduced
longer response

Question 14

advantage of electrical signal

Answer 14

no synaptic delay
allows synchronization of many cells quickly
can transmit metabolic signals between cells

Question 15

disadvantage of electrical signal

Answer 15

cannot convert signal from pre to post, from excitatory to inhibitory

Question 16

chemical synapse, glytamate

Answer 16

opens na+ channels,

excitatory

Question 17

chemical synapse, GABA

Answer 17

opens cl- channels

inhibitory

Question 18

spatial summation

Answer 18

eg if 3 neurons fire the individual signal is all below threshold,
when the signals build up together they are able to go and create suprathreshold signal
action potential

Question 19

temporal summation

Answer 19

if 2 subthreshold potentials arrive at the trigger zone within a short period of time they may sum and initiate a action potential