The Nervous System Flashcards
1
Q
Definition of stimulus
A
A detectable change in the internal or external environment of an organism that produces a response in that organism
2
Q
What are the two parts or the nervous system?
A
- central nervous system
- peripheral nervous system
3
Q
What is a nerve net?
A
- simplest type of nervous system
- diffuse Network of cells that group into ganglia, but do not form a brain
4
Q
What are the two types of cells in a nerve net?
A
- ganglion cells: provide connections in several directions
- sensory cells: detect stimuli
5
Q
Definition of resting potential
A
The potential difference across the membrane of a cell when no nervous impulse is being conducted
