Module 5: Neural and Hormonal Systems Flashcards Preview

A.P. Psychology > Module 5: Neural and Hormonal Systems > Flashcards

Flashcards in Module 5: Neural and Hormonal Systems Deck (72)
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1

Franz Gall

proposed phrenology

2

phrenology

study of bumps on skull and relationship to mental abilities and character traits

3

phrenology yielded the idea of

localization of function

4

biological perspective

concerned with link between biology and behavior

5

neuron

nerve cell

6

dendrite

receives messages

7

axon

sends messages

8

terminal branches

ends of axon which sends message to dendrites of another neuron

9

myelin sheath

fatty tissue that insulates, protects, and speeds up transmission

10

spaces between myelin on which message travels

nodes of ranvier

11

multiple sclerosis

loss of function due to deterioration of myelin

12

glial cells

support, nourish, and protect neurons
play role in learning, thinking, memory

13

neurocommunication is what type of process

electrochemical

14

action potential

electrical charge that travels down an axon

15

conditions of axon at rest

Na outside, K inside
more negative inside

16

resting potential inside the axon

-70mV

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depolarization

when Na rushes into axon, making the inside less negative

18

threshhold

level of stimulation required to trigger action potential (-55mV)

19

refractory period

when neuron cannot fire

20

Na/K pumps

return Na and K back to resting positions

21

all-or-none response

excitatory signals must exceed inhibitory signals to minimal intensity to trigger action potential

22

synapse

joining of axon of one neuron to dendrites of another

23

neurotransmitters

chemicals released by vesicles in axon that travel across the synaptic cleft to allow neurons to communicate

24

what happens to excess neurotransmitters

broken down by enzymes, drift away, reuptake

25

reuptake

reabsorbed by sending neuron

26

agonist drug

amplify effect of neurotransmitter
can bind to receptor site and act as NT, block reuptake, or facilitate release of NT

27

antagonist drug

blocks effect of neurotransmitter
inhibit release of NT or occupies receptor site to block NT from binding

28

acetylcholine (ACh)

usually excitatory
muscle contraction, learning, memory, sleep

29

ACh present at every

neuromuscular junction

30

deficiency of ACh linked to

Alzheimer's