Monday, January 17, 2011

Leech Neurophysiology Lab

Purpose: To record the electrical activity in the neurons.

Hypothesis: I think that there will be a various amount of electrical activity going on while cutting this leech open. This could be due to breaking apart the parts of the body.

Material: Probe, feather, forcepts, scissors, pins, scalpel, dissection tray, leech tank, 20% ethanol, leech tongs, dissection microscope, micromanipulator, oscilloscope, leech.

Procedure: You have to take the leech out of the ethanol, cut the leech open and inspect what is on the inside of it. Watching to see if there is little or a lot of electrical movement.

Results-- When you test each cell in the end you come to find out that each cell does different things. Some different cells respond to different things or some just don't react at all. The five types of cells consist of: N T P R and X. They each have different functions and this tells you what cells you are dealing with during the experiment.

Conclusions-- The lab was to show us the electrical activity that goes on when you dissect a leech. While doing this, you get to see how you would dissect a leech as well such as where you cut it at and what it would look like if you had to do it in real life. In the end, you get a chance to look at the different cells and see how they react to a feather, probe, and forceps.