nervous system functions pre-class quiz

Question 1

What type of ion channel opens and closes at random?

Answer 1

leak channels

Question 2

what type of ion channel requires a chemical to open?

Answer 2

ligand-gated channels

Question 3

what type of ion channel requires a change in membrane potential?

Answer 3

voltage-gated channels

Question 4

which of the following require a change in charge to open/close?
a) leak channel
b) voltage-gated channel
c) ligand-gated channel

Answer 4

b

Question 5

what are the three main functions of the nervous system in the order that they are activated?

Answer 5

1) sensory
2) integration
3) response

Question 6

true or false: sensors tell the brain what to do?

Answer 6

false

Question 6

which of the following channels open at random times?
a) voltage-gated channels
b) leak channels
c) ligand-gated channels

Answer 6

b

Question 7

true or false: generally, most channels let a single, specific ion through

Answer 7

true

Question 7

which of the following require a “key” to open?
a) voltage-gated channel
b) ligand-gated channel
c) leak channel

Answer 7

b

Question 8

a stimulus directly activates which part of the nervous system?
a) integration center
b) effector organ
c) sensory receptor

Answer 8

c

Question 9

voltage-gated channels are usually found on which parts of a neuron?
a) dendrites
b) axon
c) cell body

Answer 9

b

Question 10

ligand-gated channels are usually found on which parts of a neuron?
a) dendrites
b) axon
c) cell body

Answer 10

a

Question 11

true or false: active channels can open and close

Answer 11

true