neurones Flashcards
what are functions in the CNS based on?
communications between nerve cells
what are nerve cells known as?
neurones
what are neurones?
units of nervous tissue
what types of messages do N send?
electrical and chemical messages
when does a message become chemical?
when it reaches a synapse
what is a nerve impulse?
an electrical message that passes through the neurone
what is an electrical impulse when it becomes chemical?
a neurotransmitter
what are the different parts of a neurone?
axon mylin sheath axon terminal nucleus dendrites node of raviner schwann cell cell body axon hillock
what is the myelin sheath?
a fatty layer that helps insulate and speed up the rate in which the impulse travels
what is the axon terminal?
the end of a cell that is separated from other neurones by the synapse
what is the axon hillock?
where nerve impulses are triggered
what are dendrites?
branches off each cell body that trigger an action potential
