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A+P > The Nervous System > Flashcards

The Nervous System Flashcards

1
Q

What other system does the nervous system work with?

A

Endocrine system

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2
Q

What does the nervous system maintain?

A

Homeostasis

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3
Q

How does the nervous system communicate messages?

A

Via neurone/nerves

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4
Q

Name the three key functions of the NS

A

Sensory
Integrative
Motor

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5
Q

What is the sensory function of the NS?

A

To gather information and detect changes in the body’s internal environment.

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6
Q

What is the integrative function of the NS?

A

To analyse and interpret the changes it senses and select the appropriate response

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7
Q

What is the motor function of the NS?

A

To respond to changes by signalling the required action

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8
Q

How many divisions is the NS devised up into?

A

2

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9
Q

Why are the two decisions of the NS?

A

CNS

PNS

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10
Q

What makes up the CNS?

A

Brain

Spinal cord

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11
Q

What makes up the PNS?

A

The nerves that lie outside the spinal cord
- afferent (sensory neurones)
Efferent (motor neurones)

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12
Q

Describe the structure of the brain

A

. Cerebrum
. Cerebellum
. Diencephalon
. Brain stem (which is made up of the medulla oblongata, pons and the midbrain.)

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13
Q

Describe the structure of the spinal cord

A

.Extends from the rain stem
.Runs through the vertebral canal
.Protected by the vertebrae

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14
Q

How many subdivisions does the PNS have?

A

2

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15
Q

What is the role of the autonomic subdivision?

A

Controls involuntary functions, such as smooth muscle contrails. E.g. Digestion

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16
Q

What are the two divisions of the autonomic system called?

A

Sympathetic branch

Parasympathetic branch

17
Q

What is the role of the sympathetic branch?

A

Speed things up, e.g. Increase heart rate

18
Q

What is the role of the parasympathetic system?

A

Slow things down, e.g. Reduce heart rate

19
Q

What is the role of the somatic subdivision?

A

Controls voluntary functions such as skeletal muscle contraction and movement. E.g. Standing, walking

20
Q

What are the three different types of nerves?

A

Afferent
Efferent
Interneurons

21
Q

What is the role of afferent nerves?

A

(Sensory neurone) from the body to the CNS

22
Q

What is the role of efferent nerves?

A

(Motor neurones) from the CNS to the body

23
Q

What is the role of Interneurons nerves?

A

(Relay neurones) communications between sensory and motor nerves and the CNS.

24
Q

Describe the basic structure of a neuron

A 
. Nucleus
. Axon 
. Dendrite 
. Myelin sheath 
. Axon terminal

A+P (9 decks)

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