Biological Approach Flashcards
Name the areas of the brain
- frontal lobe
- parietal lobe
- occipital lobe
- temporal lobe
name the structures of a neuron
- dendrite
- cell body
- nucleus
- axon
- node of ranvier
- myelin sheath
- schwann cell
- axon terminal
what are neurons
cells that receive and transmit messages, passing them from cell to cell
name the 3 types of neurone
motor neurone
sensory neurone
inter neurones
what do motor neurones do
receive messages from CNS to generate movement
what do sensory neurones do
transmit messages about senses from sense organ to CNS
what do inter-neurones do
take messages from neurone to neurone
describe the structure of a neurone
at one end: dendrites (finger like structures surrounding nucleus)
from nucleus there is a long extension called an axon which reaches to an axon terminal
axon is where electrical signals from cell body travels
axon terminal has branches at end of branch is a terminal button]
axon is protected by myelin sheath which surrounds it + forms insulation layer
myelin sheath thins to nodes of ranvier
how to electrical messages arise in the cell body
due to voltage of ions in body
ions arise in certain voltages and there is a reaction which causes an action potential
action potential travels into axon via axon hillock, protected by myelin sheath
electrical signal jumps from node to node
what is the function of a neurone
to pass messages between neurones using neurotransmitters to enable behaviour, thinking and emotions to be transmitted
describe the process of
