Body & Body Systems Continued Again Flashcards Preview

AP/College Biology - 1300+ > Body & Body Systems Continued Again > Flashcards

Flashcards in Body & Body Systems Continued Again Deck (173)
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1

a blank exists across every neuron's plasma membrane

potential difference

2

cytoplasmic side of plasma membrane is blank

negative

3

extracellular fluid side is blank in a plasma membrane

positive

4

cytoplasm is negatively charged because of this

sodium potassium pump

5

sodium potassium pump brings two blank into cell for every three blank pumped out

K+, Na+

6

away from poles and toward neutral in terms of voltage

depolarization

7

depolarization makes the membrane potential more blank

positive

8

blank makes it extremely negative in terms of voltage

hyperpolarization

9

a change in membrane potential that moves down the membrane

action potentials

10

one change in voltage after another along the axon

action potentials

11

depolarization, hyperpolarization, resting are how the blank moves down the axon

action potential

12

action potentials are proliferated by blank channels

voltage-gated ion

13

two voltage gated ion channels

Na+ and K+

14

Na+ channels open blank

first

15

K+ channels open blank

second

16

Na+ causes and influx of Na+ ions causing blank

depolarization

17

K+ channel allows in K+ ions and causes blank

hyperpolarization

18

When depolarization occurs, the change in charge is detected by the blank Na+ channels

adjacent

19

Once the cytoplasm is blank enough, the next channel with blank

positive, open

20

the point where sodium is either allowed in or not of the axon

threshold

21

sodium comes in and causes blank

depolarization

22

potassium goes out and causes blank

hyperpolarization

23

Three phases of action potential

undershoot, resting potential, axon terminal

24

the signal moves down the axon until the axon blank

terminal

25

intercellular junctions between neurons

synapses

26

these cells transmit action potential

presynaptic cell

27

these cells receive the action potential

postsynaptic cells

28

chemical synapses have a blank

synaptic cleft

29

this is the space between two cells

synaptic cleft

30

end of presynaptic axon terminal contains blank

synaptic vesicles