Chapter 2 Flashcards Preview

Psychology 101 > Chapter 2 > Flashcards

Flashcards in Chapter 2 Deck (21):
1

CNS

Brain and spinal cord

2

PNS

Connects CNS to other body parts

3

2 divisions of PNS

1. Somatic NS
2. Autonomic NS

4

Somatic NS
•voluntary or involuntary
•what does it include
•examples

•Voluntary actions
•sensory and motor nerves
•walking upstairs

5

Autonomic NS
•voluntary or involuntary
• 2 divisions

•involuntary
1. Parasympathetic
2. sympathetic

6

Each neuron develops approx. ____ connections

10,000

7

What does it mean when neurons "fire"

They carry messages to the next neuron

8

6 different neurotransmitters

1. Acetylcholine
2. Dopamine
3. GABA
4. Glutamate
5. Norepinephrine
6. Seratonin

9

Acetylcholine
•function
•ACH deficit leads to

•stimulates muscles, learning and memory
•ACH deficit -> Alzheimer's

10

Dopamine
•function
•levels in Schizophrenia; levels in parkinson's

•influences sleep, mood, attention, control of voluntary movement
•high in S, low in P

11

GABA
•function
•what does low GABA lead to

•Stops other neurons from firing
•higher anxiety

12

Glutamate
•function
•what does high glutamate lead to

•excites neurons involved in learning and memory
• migraine headaches

13

Norepinephrine
•function
•Low levels lead to
•high levels lead to

• Stops neurons from sending info in CNS
•depression
•agitation, mania (bipolar)

14

Seratonin
•function
•Low levels lead to

•regulates sleep, mood, attention and learning
• depression, Prozac increases seratonin

15

Cerebral cortex

•wrinkled outer layer
•split into right and left hemispheres
•where most of cognition happens

16

4 divisions of cerebral cortex

1. Occipital
2. Temporal
3. Parietal
4. Frontal

17

Occipital lobes

•Translates info from eyes
•interprets color, shape, movement in environment
•visual memory

18

Temporal lobes

•translates info from ears
•interprets sounds and pressure changes
•auditory memory and language

19

Parietal lobes

•interprets info on balance and environment cues
•determines location in space
•directs attention and movement

20

Frontal lobes

•interprets all sensory input
•location of intelligence and personality
•directs movement

21

All-or-nothing principle

once the electrical impulse reaches a certain level of intensity, it fires and moves all the way down the axon without losing an intensity