Neurotransmission and Muscle Contraction

1 synapse Axon

Neurotransmitters

Calcium 2+ presynaptic neurone Receptors

2 Action potential

Neurotransmitters

3 As active potential goes down axon, the charges become opposite

Neurotransmitters

4 Depolarization

Neurotransmitters

5 Depolarization

Neurotransmitters

6 Depolarization

Neurotransmitters

8 o altered membrane potential allows calcium ions to enter the presynaptic neurone

Neurotransmitters

12 increase in Ca++ levels in side the cell triggers the fusion of pocket containing neurotransmitters with the presynaptic neuron membrane

Neurotransmitters

14 When the neurotransmitters leave, the change in the synapse goes back to normal

Neurotransmitters

15 Neurotransmitters have specific receptors

Neurotransmitters

• • http://science.education.nih.gov/supplements/nih2/addiction/activities/lesson2_neurot ransmission.htm

• http://web.indstate.edu/thcme/mwking/muscle.html#calcium • http://www.mpimf-heidelberg.mpg.de/~holmes/muscle/muscle1.html

• http://hometown.aol.com/bio50/LecNotes/lecnot13.html

• http://www.howstuffworks.com/muscle4.htm

• http://www.brainexplorer.org/anim/anim1.html

• http://www.merck.com/mrkshared/mmanual/section14/chapter166/166a.jsp

http://homepage.psy.utexas.edu/HomePage/class/Psy308/salinas/Neurotransmission/ release.gif

• http://www.brainexplorer.org/brain_atlas/Brainatlas_index.shtml

• http://www.mpimf-heidelberg.mpg.de/~holmes/muscle/muscle1.html

• http://www.digital-humans.org/Report2004/Documents/XIV-Final Oct2004_files/image017.gif