The Nervous System Flashcards

1
Q

What does the nervous system include?

A

The central nervous system and the peripheral nervous system

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2
Q

What are the two pathways in the brain?

A

Simple or complex

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3
Q

What does the central nervous system consist of?

3

A

The spinal cord and brain

Contains neural tissue (neurons and glia), connective tissues, and blood vessels

Is protected by bone and meninges (CT)

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4
Q

What is the CNS protected by?

A

The meninges

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5
Q

What does the CNS contain?

4

A

Neurons

Glia

Connective tissues

Blood vessels

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6
Q

List the functions of the CNS

A

To process and coordinate sensory data, motor commands, higher functions of brain

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7
Q

How does the CNS process and coordinate sensory data?

A

It does so from inside and outside the body

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8
Q

How does the CNS process and coordinate motor commands?

A

It controls activities of peripheral organs (via muscles, glands)

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9
Q

How does the CNS process and coordinate higher functions of brain?

A

It coordinates intelligence, memory, learning, emotion

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10
Q

What are the four main regions of the brain?

A

Cerebrum

Diencephalon

Cerebellum

Brainstem

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11
Q

What does the deincephalon consist of?

A

The thalamus and hypothalamus

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12
Q

What regions of the brain form the subconscious brain?

A

Diencephalon

Cerebellum

Brainstem

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13
Q

What does the peripheral nervous system consist of?

2

A

All neural tissue outside the CNS

Consists of bundles of axons

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14
Q

What does the PNS do?

2

A

It delivers sensory information to CNS

It delivers motor commands from the CNS

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15
Q

Where are cranial nerves connected?

A

They are connected to the brain

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16
Q

Where are spinal nerves connected?

A

They are connected to the spinal cord

17
Q

How many pairs of spinal nerves do we have attached to the spinal cord?

A

31 pairs of spinal nerves

18
Q

What is each spinal nerve composed of?

A

Sensory and motor axons

19
Q

What are the spinal nerves names after?

A

They are named after the spinal cord segment they are connected to

20
Q

How many cranial nerves are attached directly to the brain?

A

12

21
Q

What do the cranial nerves connect?

A

They connect parts of the face, neck and chest to the brain

22
Q

What do cranial nerves consist of?

A

Sensory, motor or mixed (sensory and motor) nerves

23
Q

Give an example of a mixed cranial nerve.

A

The optic nerve

24
Q

What is the conscious region of the brain?

A

The cerebrum

25
Q

What fraction of the brain is the cerebrum?

A

7/8

26
Q

What processes is the cerebrum associated with?

4

A

Voluntary movement

Creative

Intellectual abilities

Scientific abilities

27
Q

What are the four key areas of the cerebrum?

A

Primary sensory cortex

Primary motor cortex

Visual cortex

Auditory cortex

28
Q

What is the primary sensory cortex?

A

This is where sensory information we become aware of is sent

29
Q

What is the primary motor cortex?

A

This is where motor nerve signals leave the brain to direct conscious muscle movement

30
Q

What is visual cortex?

A

This is where sensory information from the eye is sent

31
Q

What is auditory cortex?

A

This is where sensory information from the ear is sent

32
Q

What is the diencephalon divided into?

2

A

The thalamus

The hypothalamus

33
Q

What is the thalamus?

A

The thalamus is a relay station for sensory signals

34
Q

What is the hypothalamus?

A

The hypothalamus is a major subconscious regulatory centre

35
Q

What is homeostasis?

A

Homeostasis is the property of a system that regulates its internal environment and tends to maintain a stable, constant condition of properties like temperature, pressure, glucose, O2 and pH