Transmission Of Nerve Impulses

Front 1

Action potential arrives at axon terminal and allows for opening,

* Calcium then goes through the channels

Back 1

1

Front 2

Calcium causes synaptic vesicles to fuse with membrane of axon terminal

* in synaptic vesicles are the neurotransmitters

(ACh)

Back 2

2

Front 3

ACh is released from vesicles and goes into synaptic cleft, calcium ions get pumped back out to be reset

Back 3

3

Front 4

ACh diffuses in the synaptic cleft and binds onto the sarcolemma receptors

Back 4

4

Front 5

After channels are open sodium comes in and potassium leaves. (more sodium decreases polarization)

Back 5

5

Front 6

After depolarization... ACh diffuses away, and channel closes (happens all at the same time)

Back 6

6

Front 7

Depolarization inisiates action potential then spreads all along sarcolemma and t-tubules

Back 7

7

Front 8

Action potential causes release from Calcium in the sarcoplasmis reticulum

Back 8

8

Front 9

Calcuim ions cause a trigger on a contraction of a cell

Back 9

9