Nervous System Flashcards Preview

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Flashcards in Nervous System Deck (77):
1

Maintains homeostasis
Pituitary gland

Hypothalamus

2

Region from the spinal cord to brain

Brainstem

3

Divides left and right hemispheres

Longitudinal fissure

4

Largest region of the brain


Cerebrum

5

Thick nerve connecting the left and right hemispheres of the brain

Corpus callosum

6

Involved in emotional visceral responses to odors
Pineal body

Epithalamus

7

Inner most region of the brain

Diencephalon

8

Raised portions of the cerebral cortex

Gyrus

9

Involved in balance
Muscle tone
Coordination of fine motor movement

Cerebellum

10

Relays info between the cerebrum and cerebellum
Helps control breathing
Swallowing
Balance
Chewing
Salvation

Pons(bridge)

11

Grooves of the cerebral cortex

Sulcus

12

Relays sensory info to the cerebrum and influences mood and registers unlocalized uncomfortable perception of pain

Thalamus

13

Responsible for voluntary motor functions
Motivation
Aggression
Mood
Olfactory perception

Frontal lobe

14

Relay center for auditory nerve pathways in the central nervous system and is involved in visual reflexes such as eye movement and pupil diameter and lens shape

Midbrain

15

Involved on reception and conscious perception of touch
Pain
Temperature
Balance
Taste

Parietal lobe

16

Responsible for reception and perception of visual input

Occipital lobe

17

Regulates heart rate
Breathing
Swallowing
Vomiting
Coughing
Sneezing
Coordination

Medulla oblongota

18

Involved in olfactory and auditory sensations and memory

Temporal lobe

19

Composed of the brain and spinal cord
Processes info

Central nervous system

20

Composed of nerves and ganglia
Detects external/internal stimuli
Plays telephone with cns and other parts of the body

Peripheral nervous system

21

Picks up stimuli
Sends to brain

Sensory division

22

Responds to stimulation by sending signal from the brain to the muscles and glands

Motor division

23

Beginning of an axon
Where action potentials start

Axon hillock

24

The spaces between schwann cells

Nodes of ranvier

25

The end of an axon
Releases neurotransmitters

Axon terminal

26

The space between neurons

Synapse

27

In the brain
Has many dendrites

Multipolar neurons

28

Has one dendrite
In the sensory organs

Bipolar neurons

29

No dendrites
Found on the skin
Detects touch

Unipolar neurons

30

Support cells

Neuroglia

31

Protects axon

Schwann cells

32

Creates blood brain barrier

Astrocytes

33

Creates and circulates cerebrospinal fluid

Ependymal

34

Removes waste

Microglia

35

Covers multiple areas of axon

Oligodendrocytes

36

Widely spread out across the body (skin) to sense touch
Pressure
Pain
Temperature
Proprioception

General senses

37

Associated with specific organs that have a localized collection of nerves
Smell
Sight
Taste
Hearing

Specific/special senses

38

Unipolar neurons are involved with

General senses

39

Bipolar neurons are involved with

Special/specific senses

40

Detects pressure

Mechanoreceptors

41

Detects temperature change
Hot receptors
Cold receptors

Thermoreceptors

42

Detects tissue damage
Pain

Nociceptors

43

Detects chemicals
Taste
Smell

Chemoteceptors

44

Detects light waves

Photoreceptors

45

Funnels sound

Pinna

46

Ear drum

Tympanic membrane

47

Fluid filled with mechanoreceptors

Cochlea

48

Perspiration
Shade

Eyebrows

49

Removes foreign objects
Keeps eyes lubricated

Eye lid

50

Mucus membrane covering the inner surface of the eyelid and anterior surface of the eye
Acts as protection

Conjunctiva

51

Gland that produces tears and oil

Lacrimal gland

52

Passage from eye to nasal cavity where tears drain

Lacrimal canaliculi

53

Moves the eye

Extrinsic eye muscles

54

Outer layer

Fibrous tunic

55

Middle layer

Vascular tunic

56

Inner layer

Nervous tunic

57

Fibrous tunic contains

Sclera
Cornea

58

White outer layer
Rigid structure
Helps maintain the shape of the eye

Sclera

59

Transparent part that refracts the light towards the retina

Cornea

60

Vascular tunic contains

Choroid
Lens
Iris
Pupil

61

Thin layer containing blood vessels

Choroid

62

Blood vessels and refracts light

Lens

63

Colored portion contracts to regulate pupil

Iris

64

Hole where light passes

Pupil

65

Nervous tunic contains

Retina
Macula
Optic disc

66

Contains the photoreceptors
Rods and cones

Retina

67

Small circular region of retina with high concentration of photoreceptors responsible for detailed vision

Macula

68

Point on retina where the optic cord attaches
The blind spot

Optic disc

69

Very sensitive photoreceptors that respond to all light within the visual spectrum

Rods

70

Less sensitive photoreceptors that respond to the primary colors of light

Cones

71

Red
Blue
Green

Primary colors of light

72

Located in front of the lens
Watery

Aqueous humor

73

Behind the lens
Thicker fluid

Vitreous humor

74

Cant see far away because focal point is in front of retina

Myopia
Nearsightedness

75

Cant see close because focal point is behind retina

Hyperopia
Farsightedness

76

No working cones
Very rare

Monochromancy

77

Missing one set of three cones
More common in males
Sex linked

Dichromancy