nervous system - synapse and graded potentials

Question 1

the space between two neurons is called a/n -
a) neurotransmitter
b) axon
c) synapse

Answer 1

c) synapse

Question 2

you are at the IU-Purdue basketball game with a bunch of your friends. you and your friends try to get my attention by yelling my name repeatedly.
this would be an example of -
a) temporal summation
b) spatial summation
c) temporal and spatial summation

Answer 2

c) temporal and spatial summation

Question 3

You are at the IU-Purdue basketball game with a bunch of your friends. You see me and try to get my attention by yelling my name repeatedly.

This would be an example of-
a) spatial summation
b) temporal and spatial summation
c) temporal summation

Answer 3

c) temporal summation

Question 4

what is the first step of action potential?

Answer 4

action potential travels down axon

Question 5

what is the second step of action potential?

Answer 5

opening of voltage-gated calcium channels

Question 6

what is the third step of action potential?

Answer 6

calcium influx

Question 7

what is the fourth step of action potential?

Answer 7

exocytosis

Question 8

what is the fifth step of action potential?

Answer 8

activation of post-synaptic neuron

Question 9

what causes exocytosis?
a) calcium influx
b) opening of voltage-gated calcium channels
c) calcium efflux

Answer 9

a) calcium influx

Question 10

There are three neurons - A, B, and C

Neurons A and C repeatedly send signals to Neuron B

This would be an example of-

a) temporal summation
b) spatial summation
c) temporal and spatial summation

Answer 10

c) temporal and spatial summation

Question 11

if a neuron wants to send an important signal to the brain, it will do which of the following?
a) send lots of signals
b) send one massive signal
c) stop sending signals

Answer 11

a) send lots of signals

Question 12

what do vesicles contain?
a) calcium
b) neurotransmitter
c) action potential

Answer 12

b) neurotransmitter

Question 13

true or false: a specific neurotransmitter will only cause depolarization or hyperpolarization. it will never cause both

Answer 13

false

Question 14

when voltage-gated channels open due to an action potential, what will happen to membrane potential?
a) remains constant
b) less negative
c) more negative

Answer 14

b) less negative

Question 15

neurotransmitter will activate which of the following -
a) ligand-gated channels on the post-synaptic neuron
b) ligand-gated channels on the pre-synaptic neuron
c) voltage-gated channels on the pre-synaptic neuron
d) voltage-gated channels on the post-synaptic neuron

Answer 15

a) ligand-gated channels on the post-synaptic neuron

Question 16

In class we shared a table where it listed the following concentrations of bicarbonate (HCO3-)

Extracellular fluid - 28 mEq/L
Based on this information, when bicarbonate moves it will likely cause
a) depolarization
b) need more information
c) hyperpolarization

Answer 16

b) need more information

Question 17

a graded potential that is an IPSP causes
a) depolarization
b) hyperpolarization
c) repolarization

Answer 17

b) hyperpolarization

Question 18

what kind of synapse occurs when two cells are in direct contact with each other
a) chemical synapse
b) potential synapse
c) electrical synapse

Answer 18

c) electrical synapse

Question 19

a graded potential that is an EPSP causes
a) repolarization
b) depolarization
c) hyperpolarization

Answer 19

b) depolarization

Question 20

In class we shared a table where it listed the following concentrations of magnesium (Mg2+)

Extracellular fluid - 1 mEq/L
Intracellular fluid - 58 mEq/L
Based on this information, when magnesium moves it will likely cause
a) hyperpolarization
b) more information is needed
c) depolarization

Answer 20

a) hyperpolarization

Question 21

which of the following cause calcium influx in a pre-synaptic neuron
a) opening of voltage-gated calcium channels
b) exocytosis
c) opening of ligand-gated calcium channels

Answer 21

a) opening of voltage-gated calcium channels

Question 22

You are at the IU-Purdue basketball game with a bunch of your friends. You and your friends try to get my attention by yelling my name as loud as you can one time.

This would be an example of-
a) temporal and spatial summation
b) spatial summation
c) temporal summation

Answer 22

b) spatial summation