Neurvous System Flashcards
What are the three types of neurons?
Motor neurons, Interneurons, Sensory neurons
What is a motor neuron?
makes things move
What is an interneuron?
interprets
What does a sensory neuron do?
senses
What are dendrites?
- receive and pick up messages
- conducts electrical stimulation from other cells, through synapses to the body
What is an axon hillock?
- determines the threshold
- part of a neuron that connects the cell body to the axon
What are nodes of Ranvier?
- speed up the message
- breaks in myelin
What is myelin?
- fat that insulates the axon
- coats axons in the brain and the rest of the CNS
What is neurolemma?
- insulating myelin layer that surrounds peripheral nerve fibre
- regenerates axons that have been injured
What are nerve endings?
- send signals to brain so you know how something feels if it hurts
What are neurotransmitters?
- special chemicals that your nerve cells use to talk to each other
- released from the axon terminal of one neuron into a synapse
What is a synapse?
- information flows from one neuron to another across a synapse
- synapse contains a small gap separating neurons
What are the 5 parts of the brain?
- frontal lobe
- temporal lobe
- parietal lobe
- occipital lobe
- cerebellum
What does frontal lobe do?
for personality and thinking
What does parietal lobe do?
sensory
What does occipital lobe do?
vision, receiving
What does temporal lobe do?
speech, hearing
What does cerebellum do?
balance
