bio lecture notes nov. 8th

bio lecture notes nov. 8th - Two lectures on cognitive...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Two lectures on cognitive CONNECTIONS Synapse: “fasten together” o In terms of what a memory actually, it involves a synapse o It really is abnout changes between one neuron and another. Wher eone neruron is connected with another neuron or a muscle. (motor nerve ending or plate) where the information is going to get passed from the nervous system to the muscle o Sensory-internerurons-motor neurons or other interneurons- other interneurons or with motor neuron - In animals you will find two types of synapse o We are one form o As we go down, there is another form o Electrical Synapse : is a an example of a group of specialized larlegy protoesn that form alarge intercellular projections Called gap junction- cell membrane (lipid bi-layer) cell membrane of two neurons. Youl’ll see there is actually no space between one cell and the other. They are connected by proeitns tubes that connect the cytoplasm of the presynaptic neuron and is continuous with the post synaptic neuron. Going in anf out across the cell membrane. Gab junstion enavbles the ions go from one neuron directly to the other neuron. To go from the presynaptic neuron to the postsynaptic neuron directly. In a sense they are connected directly! Cells are connected to one another! Intercalated disks- are electrical synapes throught out first cardiac muscle cell to another cardiac muscle cells Allows us to have a quick stimulation of the necxt cell that happens faster than a chemican synapse and allows for greated coordination. Ie:in heart we want great coordination, smooth muschle and brain Intercalated dicsk is and area where there is connected ions for grom one part to the next Heart muscles contract because yuou have ion flow in myofibrils Looks similar to chemical synapse the only difference is there are all connected like a zipper so they can’t get through
Background image of page 1

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

View Full DocumentRight Arrow Icon
We can open and close them but for out examples theyre always o Chemical synapse: neurons have a space action potetial cme to end and is over then starts in the post-synaptic neiuron. Can slide a sheet of paper between the two neurons Actually has a space between the two neurons Coems down is going around and by the time it get to the end, it is over. It is gone. It doesn’t jump. It’s over that event of ions is over. They meet from side to side. It presents a problem because when it gets tto th end of it, the action potential is gone but her have to start an impulse in the other neuron We need chemicals, or neurotransmitters. When it’s ready to fire and comes down the first one it causes vessicles filled with neurotransmitter made by the cellular mexhanism of the cell. Action potentioin causes a number of things to happen to make these vssicle move up and fuse with the cell membrane (exocytosis) takign wahts inside the cell and putting it on the outside Fused the two membranes. Had to do worka dn us ATP to do that. Using it to move the vessicles down the the end. Lipids are fluid just floating.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/03/2008 for the course BIO 101 taught by Professor Martin during the Fall '08 term at Rutgers.

Page1 / 6

bio lecture notes nov. 8th - Two lectures on cognitive...

This preview shows document pages 1 - 3. Sign up to view the full document.

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