Human Bio Flashcards
behavior
every action and response in which an individual engages
nervous system
the system of nerves and nerve centres in a being in which messages are sent as an electrical and then a chemical impulse. Made up of CNS and PNS
central nervous system
the part of the nervous system which is composed of the brain and spinal chord
peripheral nervous system
part of the nervous system that is made up of sensory and motor neurone. It connects the CNS to te rest of the body, and detects and responds to change
cell body
the nucleus of a neuron, containing genetic information
dendrites
structure that relays information to the cell body of a neuron
axon
Carries messages away from the cell body
myelin
a fatty, white substance that encases the axon, speeding up the conduction process. The impulse jumps from node to node
Neurotransmitters
chemical released at the axon terminals into the synapse between your neurons during a nerve impulse
sensory neurons
a nerve cell in the sense organs that detects change in a bodies internal environment and sends a message to the CNS
interneurons
Nerve cell that carries the nerve impulse through the CNS. Is a link between the sensory and motor neurons
motor neurons
A nerve cell that causes an effector to respond to a stimulus
