The Nervous System Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Functions of the nervous system

A

To transmit info from one part of the body to another and coordinates and controls body functions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Divisions of the nervous system

A

Central nervous system and peripheral nervous system

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Central N.S

A

the brain and spinal cord

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Peripheral N.S

A

Nerves that extend to the parts of the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Cells of the nervous systems

A

Neurons and glia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Types of neurons

A

Sensory, motor, and inter neurons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Sensory neurons

A

(Afferent) transmit impulses toward the spinal cord and brain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Motor neurons

A

(Efferent) transmit impulses toward the body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Inter neurons

A

Directly connect sensory and motor neurons in the spinal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The synapse

A

Tiny space between the axon of one neuron and the dendrites of another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Dendrites

A

Receive impulses (tree like)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Axon

A

Send impulses away (covered in myelin)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Myelin

A

Fatty substance covering Schwann cells (like the rubber on the wire)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Nodes of Ranvier

A

The stuff between the Schwann cells

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Dopamine

A

Stuff that create neurotransmitters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Endorphin

A

Block the impulse

17
Q

Neurotransmitters

A

Chemical “bridges”, flood the space (are released by pre-synaptic neuron)

18
Q

Brain stem

A

Controls vital functions

  • heartbeat
  • breathing
  • blood pressure
19
Q

Brain stem has three parts

A

Medulla oblongata
Pons
Midbrain

20
Q

Diencephalon

A

Interior center of the brain

21
Q

Hypothalamus

A

Controls: -body temp

  • sleep cycle
  • appetite
  • sexual arousal
22
Q

Thalamus

A
  • Relays sensory impulses to the appropriate part of the brain
  • associates sensations with emotions
23
Q

Cerebellum

A

Controls coordination of movement, balance, and equilibrium

24
Q

Cerebrum

A

Largest upper most part of the brain

  • thinking part
  • perception
  • emotions
  • memory
25
Q

Spinal cord

A

About 17-18 inches long
Extends from occipital bone to L1
Provides two way communication

26
Q

Two ways of communication what are they

A

Ascending tracts conduct impulses up the cord to brain

Descending tracts conduct impulses down the cord from brain

27
Q

Meninges

A

Tough, fluid filled membrane cover ing brain and spine made of three layers

28
Q

Layers of meninges

A

Dura-tough outer layer (next to bone)
Arachnoid-fluid fills spaces (cobweb)
Pia-directly touching brain

29
Q

Cerebrospinal fluid

A

Bathes the brain and spinal cord
Acts as a shock absorber
Continually produced

30
Q

Spinal nerves

A

31 pairs

Have sensory and motor functions

31
Q

Cranial nerves

A

12 pairs

32
Q

Autonomic nervous system

A

Motor neurons that conduct impulses to the heart, smooth, muscles and glands of the body

33
Q

2 branches of autonomic nervous system

A

Parasympathetic- controls involuntary muscles during normal every day conditions
Sympathetic- controls involuntary muscles during stressful or emergency conditions