unit 3 Flashcards

1
Q

CNS

A

Central nervous system
Brain and spinal cord

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2
Q

PNS

A

Peripheral nervous system
Everything else
Spinal and Cranial nerves

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3
Q

Sensory Division

A

Sends messages to the brain (axons pointed towards brain)

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4
Q

Motor Division

A

Sends messages away from the brain (axons pointed away from the brain)

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5
Q

Astrocytes

A

Star shaped
Most numerous nerve cell
Pick up neurotransmitters
Protect neuron from blood (acts as bodyguard)

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6
Q

Microgills

A

Kills viruses, bacteria, and dead cells

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7
Q

Ependymal

A

Moves cerebrospinal fluid (cilia)

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8
Q

Oligodendrocytes

A

Insulate neuron
Form Myelin Sheath

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9
Q

Myelin Sheath

A

An insulating layer formed around nerves to protect them (around the Axon)

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10
Q

Neuron

A

Transmit a nerve pulse
Cant regenerate

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11
Q

Frontal Lobe

A

Moves skeletal muscle

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12
Q

Occipital Lobe

A

vision is deciphered

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13
Q

Temporal Lobe

A

Hearing is deciphered

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14
Q

Parietal Lobe

A

Pain and temper

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15
Q

Epithalamus

A

Part of diencephalon
Makes cerebrospinal fluid

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16
Q

Thalamus

A

Part of diencephalon
Relay center for sensory nerves

17
Q

Hypothalamus

A

Part of diencephalon
Controls body temperature, emotion, and pleasure center

18
Q

Pons

A

Part of brain stem
Controls breathing

19
Q

Midbrain

A

Part of brain stem
Controls vision

20
Q

Medulla Oblongata

A

Part of brain stem
Controls heart rate, swallowing, and vomiting

21
Q

Dura Matter

A

Outermost layer
Looks like leather
Under the skull bone

22
Q

Arachnoid Matter

A

Looks like a spider web
Second layer
Filled with cerebrospinal fluid
Protects the brain (from concussion) so it doesn’t hit the skull; acts as a water cushion

23
Q

Pia Matter

A

Innermost layer
Prevents bacteria from entering the brain

24
Q

Cerebrospinal Fluid (CSF)

A

Made by Epithalamus
Moved by ependymal cells
Have about ½ a cup of it

25
Q

Blood Brain Barrier

A

Blood vessels are so small that not even bacteria can get in

26
Q

Dopamine

A

pleasure

27
Q

Nicotine

A

Squeezes out all dopamine

28
Q

Cocaine

A

Covers dopamine recyclers
Causes pleasure for longer
Body builds more dopamine recyclers as a result
Causes no pleasure in life afterwards

29
Q

Retina

A

Has photoreceptors

30
Q

rods

A

Night vision and peripheral vision

31
Q

cones

A

color receptors