This is a picture of the cell.
This is a picture of the electrode finding a cell to study.1. What is the electrode measuring?
The electrode is measuring the voltage of individual neurons.
2. Why use leeches in neurophysiology experiments?
The leech has 21 segmental ganglia each containing 175 pairs of neurons.
The relatively small number and the large size of the neurons have
made leeches favorite subjects of neurobiologists.
3. What is the difference between a sensory and a motor neuron?
A motor neuron is a nerve cell that conducts nerve impulses away
from the central nervous system and innervates effectors.
A sensory neuron is a nerve cell that transmits nerve impulses to the
central nervous system after a sensory receptor has been stimulated.
4. Do you think a leech experiences pain? What is pain?
Yes, I think a leech experiences pain because they have a brain
and a nerve cord. Anything with a nerve cord probablly feels pain.
Pain is a sensation that hurts. It may cause discomfort, distress, or
agony.
5. What were the two most interesting things about doing this lab?
These labs are so fun and it is amazing how you can do them on the
computer and understand them. It was interesting because doctors
really do use leeches for medical treatment.
6. Anything you found confusing or didn't like about the lab?
No, I found this lab fun and interesting. Nothing was confusing
at all.
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