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Neuroscience > Week One > Flashcards

Week One Flashcards

1
Q

What is the nervous system divided into?

A

Central nervous system: brain & spinal cord

Peripheral nervous system: cranial and spinal nerves

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2
Q

What are the CNS and PSNS composed of?

A

Neurons and supporting cells

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3
Q

Where are neurons present?

A

In the nerves

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4
Q

What do neurons do?

A

Produce and transmit the nerve impulse

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5
Q

What is a nerve made of?

A

Composed of several bundles of axons (nerve fibres) held together by connective tissue

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6
Q

What do most nerves contain?

A

Sensory and motor fibres

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7
Q

What is the composition of nerve fibre?

A

Epineurium
Perineurium
Endoneurium

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8
Q

What is the epineurium?

A

Outermost protective layer
Dense connective tissue
Rich in collagen

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9
Q

What is the perineurium?

A

Surrounds each individual fascicle
Isolates bundle of axons from surrounding connective tissue
Encloses fluid filled space between perineurium and underlying nerve axons

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10
Q

What is the endoneurium?

A

Includes seams of loose connective tissue to provide pathways for small arterioles, venules, axons

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11
Q

What are the three principle regions of a neuron?

A

Cell body
Dendrite
Axon

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12
Q

What is the purpose of cell body of a neuron?

A

Nutritional centre

Large molecule production

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13
Q

What is the purpose of a dendrite?

A

Receptive area for impulse transmission

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14
Q

What is the purpose of an axon?

A

Surrounded by Schwann cells

Conduct impulses away from the cell body

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15
Q

What is the axoplasm?

A

The axon’s cytoplasm

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16
Q

What is the axolemma?

A

The axon’s membrane

17
Q

What is the neurolemma?

A

The outermost layer of nerve fibre in the PSNS

Cytoplasmic layer of Schwann cells surrounding multiple wrapping of myelin

Neuroscience (9 decks)

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