Quiz NEURONS

18 Questions | By Zfouz17 | Updated: Mar 16, 2022 | Attempts: 1040

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How neurons communicate

Questions and Answers

1.

How do neurons communicate?
- A.
  
  Chemical methods
- B.
  
  Electrical methods
- C.
  
  Combination of both
Correct Answer
C. Combination of both
2.

An electrical gradient is the

Correct Answer
difference in the inside and outside of the cell
3.

Different composition of sodium and potassium is called concentration gradient
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
4.

difference in charge between inside and outside (negative) is called the resting potential
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
5.

When sodium are at ____, channels close ______ channel stays open

Correct Answer
rest, potassium
6.

Sodium can come back in during rest (when cells are not charged)
- A.
  
  True
- B.
  
  False
Correct Answer
B. False
7.

Based on the charge, sodium wants to stay in because of the oppostite charge, but what makes it want to leave
- A.
  
  Concentration gradient
- B.
  
  Electrical gradient
- C.
  
  Resting potential
Correct Answer
A. Concentration gradient
8.

When the cell resists the production of more action potentials this is called
- A.
  
  Relative refractory period
- B.
  
  Refractory period
- C.
  
  Hyperpolarization
Correct Answer
B. Refractory period
9.

When a stronger than usual stimulus is needed this is called the relative refractory period
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
10.

we need refractory period to keep action potential in opposite directions
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
in ONE direction

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11.

When inside of cell gets more positive, which stimulates neuron this is called _______________ and is associated with ______

Correct Answer
graded depolarization, EPSP
12.

When the inside of the cell gets more negative this is called _________ which is associated with

Correct Answer
graded hyperpolarization, IPSP
13.

More Na+ outside neuron than inside, less K+ outside neuron than inside is called concentration gradient
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
14.

The action potential travels down neuron A’s axon via saltatory conduction. The action potential only travels in one direction because of
- A.
  
  Electrical gradient
- B.
  
  Concentration gradient
- C.
  
  Refractory periods
Correct Answer
C. Refractory periods
15.

Once the action potential reaches the end of theaxon this is called the ____________ terminals

Correct Answer
presynaptic
16.

Dendrites receive info
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
17.

Axon sends info
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
18.

Describe the all or none law

Correct Answer
Neuron is stimulated to the point that it reaches its threshold of excitation, Point where neuron needs to be stimulated in order to fire an action potential It will fire a full action potential even if u stimulate beyond the threshold, the intensity of the action potential will stay the same (wont increase) Threshold of excitation:

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Current Version
Mar 16, 2022

Quiz Edited by
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Feb 08, 2011

Quiz Created by
Zfouz17

Quiz Neurons

How do neurons communicate?

An electrical gradient is the

Different composition of sodium and potassium is called concentration gradient

difference in charge between inside and outside (negative) is called the resting potential

When sodium are at , channels close __ channel stays open

Sodium can come back in during rest (when cells are not charged)

Based on the charge, sodium wants to stay in because of the oppostite charge, but what makes it want to leave

When the cell resists the production of more action potentials this is called

When a stronger than usual stimulus is needed this is called the relative refractory period

we need refractory period to keep action potential in opposite directions

When inside of cell gets more positive, which stimulates neuron this is called _________ and is associated with

When the inside of the cell gets more negative this is called _________ which is associated with

More Na+ outside neuron than inside, less K+ outside neuron than inside is called concentration gradient

The action potential travels down neuron A’s axon via saltatory conduction. The action potential only travels in one direction because of

Once the action potential reaches the end of theaxon this is called the ____________ terminals

Dendrites receive info

Axon sends info

Describe the all or none law