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BSC2346 2019 January Module 6 Quiz Latest

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Due on: 03/15/2019
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BSC2346 Human Anatomy and Physiology I

Module 06 Quiz

Question 1

An action potential can only be propagated along a myelinated axon.

Answers:            

True

 False

Question 2

As long as neurotransmitters are bound to a receptor, ion channels remain open.

Answers:            

 True

False

Question 3

Which statement is true regarding the nervous system?

Answers:            

Neuroglia cells are only responsible for providing immunity to the nervous cells

 Depolarization is the reduction of the membrane potential; going from negative to a more positive charge

Neurons can communicate with other cells without the use of neurotransmitters

Damaged myelin on an axon has no effect with its ability to transmit an action potential

Question 4

During relative refractory period, a neuron cannot create another action potential to a stimulus no matter how strong or intense that stimulus is.

Answers:            

True

 False

Question 5

The resting membrane potential of a neuron, specifically in the axon, is more negatively charged inside when compared to the extracellular space (outside of the cell)?

Selected Answer:           

 True

Answers:            

 True

False

Question 6

Which statement is true regarding action potentials (nerve impulses)?

Answers:            

An action potential moves from the axon to the soma of a neuron

Is typically only generated in the dendrite portion of a neuron

Neuroglia are solely responsible for creating action potentials

When action potentials reach the axon terminal, they cause the release of neurotransmitters

Question 7

During the repolarization phase of an action potential, the neuron begins to regain its negative internal charge.

Answers:            

 True

False

Question 8

Which portion of the neuron processes information?

Answers:            

Dendrites

 Soma

Myelin

Axon

Question 9

Action potential is unique to neurons and muscle cells. Other body cells do not use this process.

Answers:            

 True

False

Question 10

Which choice is true regarding myelin sheaths?

Answers:            

Myelin sheaths cover dendrites in the central and peripheral nervous system

Myelin sheaths help release neurotransmitters from the axon terminal

 Myelin sheaths allow for the conduction of nerve impulses (action potentials) to be transmitted faster

Myelin sheaths are composed of astrocytes and satellite cells

Question 11

The generation or creation of an action potential depends on the strength of the stimulus a neuron receives. 

Answers:            

 True

False

Question 12

Which choice is true regarding neuroglia cells?

Answers:            

The majority of neuroglia cells are found in the peripheral nervous system

Schwann cells function are located in the central nervous system

 Oligodendrocytes produce myelin sheaths

Astrocyte cells protect the neurons by acting almost like an immune cell

Question 13

Which statement is true regarding the action potential process?

Answers:            

Depolarization occurs because voltage gated K+ channels allow K+ ions to rush into the cell

The repolarization phase must occur prior to depolarization

The action potential process only occurs at the nodes of Ranvier in myelinated axons

Hyperpolarization allows for Na+ and K+ ions to move into and out of the cell

Question 14

The autonomic nervous system is a sub-division of sensory (afferent) division?

Answers:            

True

 False

Question 15

Which statement is true regarding neurons?

Answers:            

Both the axons and dendrites receive information from other neurons and cells

The nucleus of the neuron is located in the axon

 Neurotransmitters are released from the axon terminal(s)

Myelin sheaths provide protection to the axons but slow the nerve impulse (action potential) through it

 

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