40_Synapse

40_Synapse - XL. XL. 0B Intercellllullar Nerve Conductiion:...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
0B X X X L L L . . . I I I n n n t t t e e e r r r c c c e e e l l l l l l u u u l l l a a a r r r N N N e e e r r r v v v e e e C C C o o o n n n d d d u u u c c c t t t i i i o o o n n : : : S S S y y y n n n a a a p p p s s s e e e ± Complex regulation of synaptic transmission allows for complexity of responses: whereas AP transmission can be likened to electrical transmission through wires, synapses are the “computer chips” of the nervous system. ± Action potentials transmitted along the length of the neuron must travel to other neurons too. The AP transmission to another cell takes place at the contact point between the end of the axon of one cell and the soma or dendrite of another cell. ± These intercellular contacts are called synapses. There are two main kinds of synapses: electrical and chemical. ± In electrical synapses, the adjacent cells are joined by gap junctions. Cytoplasm is continuous across these junctions, and the ionic imbalance spreads quickly from one cell to another. ± In chemical synapses, adjacent cells are not physically connected. The information travels by means of a chemical intermediate from one cell to another. 1B S S S t t t r r r u u u c c c t t t u u u r r r e e e o o o f f f a a a C C C h h h e e e m m m i i i c c c a a a l l l S S S y y y n n n a a a p p p s s s e e e ± The end of an axon contains vesicles packed with chemical neurotransmitters. ± The membrane of the axon (presynaptic membrane) is separated by the synaptic cleft, a space 20 nm wide,
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 11/02/2011 for the course BIO bsc2010 at FSU.

Page1 / 3

40_Synapse - XL. XL. 0B Intercellllullar Nerve Conductiion:...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online