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Neurons Synapses and Signaling

Total questions: 28

Worksheet time: 14mins

Name
Class
Date
1.

What part of the neuron receives incoming messages from other cells?

a)

nucleus

b)

cell body

c)

dendrites

d)

synaptic terminals

2.

What structure(s) aid in speeding up synaptic transmission across the axon?

a)

Nodes of Ranvier

b)

dendrites

c)

myelin sheath

d)

both Nodes of Ranvier and the myelin sheath

3.

The central nervous system

a)

consists of the brain and spinal cord

b)

consists of the nerves that communicate motor and sensory signals throughout the rest of the body

4.

Structure D represents

a)

a sensory neuron

b)

a motor neuron

c)

an internueron

d)

a sensory receptor

5.

Structure B represents

a)

a sensory receptor

b)

an interneuron

c)

a motor neuron

d)

a response

6.

During which stage of this action potential do sodium ions (Na+) flow through the sodium channels from the outside of the membrane to the inside of the membrane?

a)

threshold

b)

depolarization

c)

repolarization

d)

refractory period

7.

During which stage of the action potential does the membrane return to its resting state?

a)

refraction

b)

depolarization

c)

rising phase of the action potential

d)

falling phase of the action potential

8.

What is released into the synaptic cleft?

a)

neurotransmitters

b)

excitatory neurotransmitters

c)

inhibitory neurotransmitters

d)

all of these are released into the synaptic cleft

9.

The sodium-potassium pump

a)

uses diffusion to attain -70mV

b)

uses ATP to create a membrane differential along the axon

c)

is stimulated by neurotransmitters

d)

is an example of passive transport across a membrane

10.
The nerve impulse is an electrical current that travels along dendrites or axons.
a)
True 
b)
False
11.
When a cell is at rest, the inside is more _____ and the outside is more ______. 
a)
negative; positive
b)
positive; negative 
12.
What describes the phase of quick entry of sodium ions into an axon during an action potential? 
a)
passive transport
b)
depolarization
c)
ion transport
d)
repolarization 
13.

What generates a nerve impulse from the axon terminal to the dendrite of the next neuron?

a)

Calcium binding with a receptor site

b)

Potassium leaking into the post-synaptic membrane

c)

Neurotransmitter binding with receptor sites

d)

Neurotransmitter being removed from the synapse

14.
For a neuron with a resting membrane potential at -70mv, an increase in the movement of sodium ions into the neuron's cytoplasm would result in:
a)
the depolarization of the neuron.
b)
the repolarization of the neuron 
c)
the replacement of potassium ions with sodium ions.
d)
the replacement of potassium ions with calcium ions.
15.
Label the Neuron-What does the letter "A" represent?
a)
Axon
b)
Dendrite
c)
Axon Terminal
d)
Cell Body
16.
Label the Neuron-What does the letter "D" represent?
a)
Dendrite
b)
Axon
c)
Myelin Sheath
d)
Node of Ranvier
17.
What is the insulating membrane that surrounds parts of the axon that helps the impulses travel faster called?
a)
Axon
b)
Dendrites
c)
Node of Ranvier
d)
Myelin Sheath
18.
What number on the graph represents the Threshold phase
a)
1
b)
3
c)
4
d)
6
19.
What number(s) on the graph represents the Resting Potential?
a)
1 and 2
b)
1 and 5
c)
2 and 3
d)
3 and 4
20.

The location of neurotransmitters

a)

axon terminals

b)

dendrites

c)

Schwann cells

d)

cell body

21.

Which of the following best describes a neuron?

a)

Specialized cells that protects the body from any foreign particles

b)

Specialized cell that transports oxygen throughout the cardiovascular system

c)

Specialized cell that functions to transmit electrical impulses within the nervous system

d)

Specialized cells that receive and read signals sent from the body

22.

What are the 3 stages in action potential? Select all that apply.

a)

Depolarization

b)

Repolarization

c)

Refractory period

d)

Resting potential

23.
Which ions are involved in the electrical nerve impulse?
a)
Iodine and Sodium
b)
Potassium and Sodium
c)
Iron and Sodium
d)
Calcium and Iodine
24.
When a neuron is depolarized, what are the first channels to open?
a)
Sodium
b)
Potassium
c)
Calcium
d)
ACTH
25.
Z
a)
Dendrite
b)
Axon Terminal
c)
Neurotransmitters
d)
Synapse
26.
W
a)
Axon Terminal Button
b)
Neurotransmitters
c)
Dendrite
d)
Synapse
27.

X

a)

Axon Terminal

b)

Neurotransmitters

c)

Dendrite

d)

Synaptic cleft

28.

when does the stimuli cause an action potential?

a)

when it reaches threshold

b)

just below the threshold

c)

just above threshold

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