chapter 10 Flashcards

1
Q

action potential comes from where

A

the brain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

from the brain the action potential goes where

A

the spinal cord

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

from the spinal cord the action potential goes where

A

motor neuron

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

from the motor neuron goes where

A

the motor neuron of the PNS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

from the PNS goes where

A

the axon terminal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

when the action potential goes to the axon terminal what does it stimulate

A

the opening of voltage gated calcium ion channels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

when voltage gated calcium channels are open what diffuses through to the axon terminal

A

calcium ions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what does calcium in the axon terminal stimulate

A

synaptic vesicles to fuse to the presynaptic membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

by synaptic vesicle fusing to presynaptic membrane what happens

A

the release of ACH into the synaptic cleft

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

when ACH is released what happens

A

ACH binds to receptor of chemical gated sodium ion channels

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

when ach binds to receptor what happens

A

chemical gated sodium ion channels open

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

when chemical gated sodium ion channels open what is diffused across the sarcolemma

A

sodium ions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

when sodium ions diffuse across the sarcolemma what happens

A

creation of new action potential in the muscle fiber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

where does the new action potential go

A

travels down the sarcolemma into the T-tubules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

from the T-tubules where does the action potential go

A

terminal cisternae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

when action potential goes to the terminal cisternae what does this stimulate

A

the opening of voltage gated calcium ion channels

17
Q

opening of voltage gated calcium ion channels allows what

A

calcium ions to diffuse out

18
Q

when calcium ions diffuse out what happens to them

A

replenished by calcium ions stored in the SR

19
Q

calcium ions that diffuse out of the terminal cisternae will go where

A

into the sarcomere

20
Q

after calcium ions go to the sarcomere what happens

A

they bind to troponin

21
Q

when calcium binds to troponin what happens

A

troponin changes configuration pulling on tropomyosin

22
Q

when the pulling of tropomyosin happens what is exposed

A

the active binding site of G actin

23
Q

what does the exposure of G-actin allow

A

the head of the myosin myo-filaments to bind to the active binding site

24
Q

what happens after myofilaments bind to the binding site

A

ADP+P are released from myosin head

25
release of ADP+P does what
changes configuration of myosin head from upright to bent(powerstroke)
26
what does power-stroke do
pulls on actin myofilaments
27
the pulling of actin myofilaments cause what
actin and myosin to slide past one another
28
after actin and myosin slide past one another what happens
ATP binds to myosin head
29
the binding of ATP to myosin head causes what
myosin head to detach from active binding site of G actin
30
after myosin detaches what happens
ATP is broken down into ADP+P
31
the break down of ATP does what
reconfigures the myosin head from bent to upright