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HBS - Neuron & Action Potential

Total questions: 60

Worksheet time: 2hrs 0mins

Name
Class
Date
1.

The part of the neuron that receives incoming messages is the

a)

dendrite

b)

axon

c)

cell body

d)

axon terminal

2.

The part of the neuron that is protected by the myelin sheath is the

a)

cell body

b)

dendrites

c)

axon

d)

axon terminals

3.

The cell body contains the

a)

dendrites

b)

axon terminals

c)

nucleus and many organelles

d)

myelin sheath

4.

When a neuron is at REST,

a)

the inside of the neuron is negatively charged compared to the outside.

b)

the inside of the neuron is positively charged compared to the outside.

c)

there is no charge difference established

d)

none of these is true

5.

An electrical impulse within a single neuron is called a

a)

synapse

b)

membrane potential

c)

action potential

d)

cell body

6.

Depolarization is occuring at number

a)

1

b)

2

c)

4

d)

5

7.

What maintains the resting membrane potential in a neuron?

a)

sodium-potassium pumps

b)

sodium channels

c)

potassium channels

d)

gravity

8.

Which of the following uses ACTIVE transport?

a)

sodium-potassium pump

b)

sodium channel

c)

potassium channel

d)

diffusion

9.

Which ion is pumped into the axon of a neurone to help maintain the resting potential?

a)

calcium

b)

hydrogen

c)

potassium

d)

sodium

10.

Which of the following restores the resting membrane potential in a neurone?


I. Na+ channels opening

II. K+ channels closing

III. The Na+/K+ ATP pump

a)

I and II only

b)

II and III only

c)

I and III only

d)

III only

11.

Which one of the following is involved in maintaining a resting membrane potential?

a)

Na+/K+ ATPase pump moves 3Na+ in for every 2K+ out

b)

Na+/K+ ATPase pump moves 3K+ in for every 2Na+ out

c)

Na+/K+ ATPase pump moves 3Na+ out for every 2K+ in

d)

Na+/K+ ATPase pump moves 3K+ out for every 2Na+ in

12.
When a neuron is not engaged in an impulse.
a)
Resting potential
b)
Action potential
c)
Neural potential
d)
Synaptic potential
13.

What do we call a nerve cell that is the basic working unit of the brain and nervous system?

a)

axon

b)

neuron

c)

dendrite

d)

neurotransmitter

14.
A
a)
Dendrite
b)
Axon
c)
Axon Terminal
d)
Cell Body
15.
Label the Neuron-What does the letter "A" represent?
a)
Axon
b)
Dendrite
c)
Axon Terminal
d)
Cell Body
16.

B

a)

Dendrite

b)

Axon

c)

Axon Terminal

d)

Cell Body

17.
Label the Neuron-What does the letter "E" represent?
a)
Schwann Cell
b)
Node of Ranvier
c)
Axon Terminal
d)
Myelin Sheath
18.
What is the chemical used by a neuron to transmit an impulse across a synapse to another nerve cell?
a)
Neurotransmitters
b)
Synapse
c)
Threshold
d)
Impulse
19.
-70 mV is the measure of a
a)
Threshold Potential
b)
Action Potential
c)
Resting Potential
d)
End Point Potential
20.
The sodium-potassium pump is involved in establishing the resting membrane potential. 
a)
True
b)
False
21.
Which ions are involved in an action potential?
a)
Na; Cl
b)
Na; K
c)
K; Cl
d)
Na; Ca
22.
What is the normal resting potential of a neuron cell membrane?
a)
+40mV
b)
-30mV
c)
+55mV
d)
-70mV
23.
Which is the correct order of events in depolarisation then repolarisation? 
a)
Sodium channels close, potassium channels open
b)
Sodium channels open, potassium channels open, 
c)
Sodium channels open, potassium channels close
d)
Potassium channels open, sodium channels open
24.
At which point on the diagram does depolarisation of the axon occur? 
a)
A
b)
B
c)
C
d)
D
25.
The sodium potassium pump restores the resting potential. By which process does this work? 
a)
Osmosis
b)
Diffusion
c)
Facilitated diffusion
d)
Active transport
26.
What is the insulating membrane that surrounds parts of the axon that helps to protect & propagate action potential?
a)
Axon
b)
Dendrites
c)
Node of Ranvier
d)
Myelin Sheath
27.
A membrane potential becoming less negative is called
a)
hyperpolarization
b)
depolarization
c)
repolarization
d)
polarization
28.
In resting potential, neurons have more _________ on the outside of the cell membrane.
a)
K+
b)
NaCl
c)
Na+
d)
Cl-
29.
In resting potential, neurons have more ____________ on the inside of the cell membrane.
a)
NaCl
b)
Na+
c)
K+
d)
Cl-
30.
Describes the fact that a neuron fires at the same intensity despite the intensity of the stimulus.
a)
Threshold
b)
Repolarization
c)
All or None Principle
d)
Action Potential
31.
When a neuron is depolarized, what are the first channels to open?
a)
Sodium
b)
Potassium
c)
Calcium
d)
ACTH
32.
At what stage does Potassium end outside the neuron, and Sodium ends inside the neuron?
a)
Depolarizarion
b)
Repolarization
c)
Hyperpolarization
d)
Resting Potential
33.

What is the Na+/K+ pump in charge of?

a)

a protein in the membrane that pumps sodium IN and potassium OUT a cell

b)

processes of a neuron

c)

moves the neurotransmitters

d)

a protein in the membrane that pumps sodium OUT and potassium INTO a cell

34.

Define Channel.

a)

electrical difference between the inside and the outside of a neuron

b)

electrical energy measured in volts or millivolts

c)

when membrane potential becomes less negative

d)

a protein in a cell membrane that forms a hole that opens and closes so ions can move in or out of a cell

35.

Define action potential

a)

A rapid change in the membrane potential from negative to positive and back to negative that moves along the axon

b)

the membrane potential when the neuron is not sending an action potential

c)

the depolarized membrane potential where the action potential begins--At or above threshold--nothing can stop action potential

d)

when the membrane potential moves back to resting level

36.

Depolarization is...

a)

makes the membrane more negative

b)

when membrane potential becomes less negative

c)

when the membrane potential moves back to resting level

d)

the membrane potential when the neuron is not sending an action potential

37.

Hyperpolarization is...

a)

the depolarized membrane potential where the action potential begins--at or above threshold--nothing can stop action potential

b)

when the membrane potential moves back to resting level

c)

when membrane potential becomes less negative

d)

make the membrane more negative

38.

Define Repolarization...

a)

when the membrane potential moves back to resting level

b)

make the membrane more negative

c)

when membrane potential becomes less negative

d)

the membrane potential when the neuron is not sending an action potential

39.

What are Neurotransmitters?

a)

the difference in concentration of an ion across a membrane

b)

the chemical that a nerve terminal releases to send a signal to the next neuron

c)

electrical difference between the inside and the outside of a neuron

d)

the amount of an ion in a certain place or volume

40.

What are the same as "nerve ending"?

a)

Neurontransmitters

b)

Dendrites

c)

Axon Transmitters

d)

Nucleus

41.

What does the neuron's Myelin Sheath do?

a)

Controls the actions of the neuron

b)

Produces food for the neuron

c)

Carries information from the cell body to other neuronsThis is a wrong answer

d)

Surrounds and insulates the axon

42.

What do Dendrites do?

a)

Intakes information from other neurons

b)

Produces fatty tissue for the Myelin Sheath

c)

Sends information to the next cell

d)

Controls the speed of electrical signal through the axon

43.

What do Nodes of Ranvier do?

a)

Intakes information from other neurons

b)

Produces fatty tissue for the Myelin Sheath

c)

Sends information to the next cell

d)

Controls the speed of electrical signal through the axon

44.

What do Schwann Cells do?

a)

Intakes information from other neurons

b)

Produces fatty tissue for the Myelin Sheath

c)

Sends information to the next cell

d)

Controls the speed of electrical signal through the axon

45.

What do Axon Terminals do?

a)

Intakes information from other neurons

b)

Produces fatty tissue for the Myelin Sheath

c)

Sends information to the next cell

d)

Controls the speed of electrical signal through the axon

46.
Depolarization occurs because
a)
more potassium ions diffuse into the cell than sodium ions diffuse out of 
b)
more potassium ions diffuse out of the cell than sodium ions diffuse into it 
c)
more sodium ions diffuse into the cell than potassium ions diffuse out of it
d)
more sodium ions diffuse out of the cell than potassium ions diffuse into it
47.

Type of neuron that sends nerve impulses to muscles and gland, by the command of other neurons.

a)

Motor Neurons

b)

Interneurons

c)

Sensory Neurons

48.

Type of neuron that perceive information about your environment.

a)

Motor Neuron

b)

Interneuron

c)

Sensory Neuron

49.
Once the brain receives a message from the sensory neurons, it sends a message to make your muscles move. Which of these is responsible for that movement?
a)
Motor neurons
b)
Inter neurons
c)
Sensory neurons
d)
Spinal cord
50.
Messages are carried back and forth between the brain and every part of the body by
a)
Motor neurons
b)
Inter neurons
c)
Sensory neurons
d)
Spinal cord
51.
Which of these is the correct path from stimulus to response?
a)
Stimulus is detected by receptors. A signal is sent to the brain. The brain sends a response to the area. 
b)
You sense a stimulus. You make a decision to react to the stimulus. A message is sent to the brain. You decide whether to do what your brain tells you. 
c)
A stimulus is detected. If the stimulus is severe, your brain reacts. If the stimulus is mils, your brain ignores it. You then make the decision to response. 
d)
A stimulus passes through a chemoreceptor. The signal is then sent to the brain. A photoreceptor causes a response. 
52.

The head of a phospholipid is ?

a)

Hydrophobic

b)

Hydrophillic

c)

Amphiphathic

53.

The tail of a phospholipid is?

a)

Hydrophobic

b)

Hydrophillic

c)

Amphiphathic

54.
Hydrophobic region of the cell membrane?
a)
E
b)
B
c)
C
d)
A 
55.
Hydrophilic portion of cell membrane?
a)
A
b)
C
c)
D
d)
E 
56.

the double layer of phospholipid molecules that makes up the membranes of a cell, the phospholipids are composed of a hydrophillic head and a hydrophobic tail

a)

homeostasis

b)

diffusion

c)

metabolism

d)

phospholipid bilayer

57.

A barrier that lets some substances into and out of the cell while preventing the movement of other substances

a)

cell membrane

b)

diffusion

c)

phospholipid bilayer

d)

metabolism

58.
When something is 'water fearing' it is....
a)
Hydrophobic
b)
Hydrophilic 
c)
Hydroelectric 
d)
Hydrochloric
59.
When something is 'water loving' it is.....
a)
Hydrophobic
b)
Hydrophilic 
c)
Hydroelectric 
d)
Hydroloric
60.
Which part of this phospholipid is hydrophobic?
a)
fatty lipid tails
b)
head
c)
all of it is hydrophobic
d)
none of it is hydrophobic

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