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My BDS1 > The Nervous System/Tissue > Flashcards

The Nervous System/Tissue Flashcards

1
Q

What composes the central nervous system?

A

The brain

Spinal cord.

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2
Q

What composes the peripheral nervous system?

A

The cranial and spinal nerves.

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3
Q

What are the two types of cell found in the nervous system?

A

Neurons

Glia

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4
Q

What is the role of glia?

A

Supportive and nutritional role.

Myelin formation.

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5
Q

What glia are found in the central nervous system?

A

Oligodendrocytes

Astrocytes

Ependymal cells

Microglia

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6
Q

What cells are found in the peripheral nervous system?

A

Schwann cells

Satellite cells.

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7
Q

what is the role of oligodendrocytes?

In what nervous system?

A

Produce myelin in the CNS.

Sheaths wrap around the axons.

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8
Q

What is the role of satellite cells?

In what nervous system?

A

Cover the surface of neuronal cell bodies.

PNS

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9
Q

What is the role of microglia?

In what nervous system?

A

Phagocytic defence role

CNS

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10
Q

What is the role of Schwann cells?

In what nervous system?

A

Produce myelin in the PNS

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11
Q

What is the function of astrocytes?

In what nervous system?

A

Nutrient supply to neurons.

CNS

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12
Q

What is the role of ependymal cells?

In what nervous system?

A

Production of cerebrospinal fluid.

CNS

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13
Q

What are the two divisions of the peripheral nervous system?

A

Autonomic nervous system

Somatic

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14
Q

What are the two divisions of the autonomic nervous system?

A

Sympathetic.

Parasympathetic

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15
Q

What are the two divisions of the somatic nervous system?

A

Afferent (to)

Efferent (away)

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16
Q

What is the purpose of nerves of the peripheral NS?

A

Deliver information to the central nervous system.

17
Q

Name the structures of the neuron.

A

Dendrites
Cell body
Axon
Axon terminal

18
Q

What two structures from a synapse?

A

Dendrites of 1 neuron and the son terminals of another neuron

19
Q

What is contained within the cell body of a neuron?

A

NO CENTRIOLE: Damage irreversible.

Large nucleus.
Nissl body: supports translation.
Lots of mitochondria

20
Q

What nervous system has all of the axons myelinated?

A

The CNS

21
Q

What do ependymal cells have on their surfaces that allow movement of the fluid?

A

Cilla and microvilli.

22
Q

Where are cells outwit the CNS located?

A

In ganglions.

23
Q

What characteristic of myelinated axons allows ions to flow in and out?

A

Nodes of Ranvier: Gaps in the myelin, allows the action potential impulse to jump from one node to another: saltatory conduction.

24
Q

What is saltatory conduction?

A

Occurs in myelinated axons.

Where the action potential jumps/skips from one node to another via the nodes of Ranvier.

My BDS1 (48 decks)

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