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Anatomy And Physiology > Nervous Tissues > Flashcards

Nervous Tissues Flashcards

1
Q

Two types of nervous system

A

Central nervous system (CNS)
Peripheral nervous system (PNS)

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2
Q

What are the components of CNS

A

Brain
Spinal cord

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3
Q

What are the components of PNS

A

Cranial nerves
Ganglia nerves
Ganglia outside CNS
Spinal nerves

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4
Q

Two types of nervous tissue

A

Neuroglia
Neurons

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5
Q

Function of neuroglia

A

Protect and support neurons
Segregate and insulate neurons
Secrete chemicals to guide young neurons to proper connections
Promote neuron health and growth

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6
Q

Astrocytes

A

Most common
Provide support
Processes attach to neuron and their endings
Cover capillaries
Regulate the chemical environment

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7
Q

Microglia

A

Small cells
Carry out defense role

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8
Q

Ependymal cells

A

Lines the central cavities of the brain and spinal cord
Produce and circulate cerebrospinal fluid

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9
Q

Oligodendrocytes

A

Wrap around neuron fibers and form myelin sheath
Insulating myelin sheath

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10
Q

Neuroglia of the PNS

A

Satellite cells and Schwann cells

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11
Q

Neuroglia of CNS

A

Ependymal cells
Astrocytes
Oligodentrocytes
Microglia

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12
Q

Neuroglia of PNS

A

Satellite cells
Shwann cells

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13
Q

Satellite cells

A

Surround neuron cell bodies

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14
Q

Shwann cells

A

Surround nerve fibers
Form myelin sheath

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15
Q

Neuron classification

A
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16
Q

What is Multipolar neuron

A

Multiple dendrites

17
Q

What is unipolar neurons

A

No Dendrites

18
Q

What are bipolar neurons

A

Only one dendrite

19
Q

How do neurons communicate with each other

A

Actions potentials
Chemical neurotransmitter

20
Q

What is an action potential

A

Is an impulse is a sequence of rapidly occurring events that decrease and reverse the membrane potential and then eventually restore it to the resting stage
A depolarizing phase
A depolarizing phase

21
Q

Can injured axon regenerate in PNS

A

Yes

22
Q

Can injured axon regenerate in CNS

A

No

Anatomy And Physiology (16 decks)

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