nervous system 1 Flashcards
What are the 2 types of nervous tissue?
Neurons and glia
What is THE neuron?
Basic structural unit of the nervous system
What are glia?
Cells of support tissue for nervous system
What are nervous tissues specialized to do?
Receive info
Transmit info
Store info
What is A neuron?
Nerve cell body and all its processes (brances
What does a dendrite do?
Carries impulses toward cell body
What is an axon?
A neuron process that transfers info from cell body to next unit
What are the poles of the neuron?
Connects processes to cell body; multipolar, bipolar and unipolar
What type of neuron corresponds with the route receptor organs to CNS?
Sensory neurons
What type of neuron corresponds with the route CNS to muscles?
Motor Neurons
What type of neuron corresponds with the route neuron to neuron?
Interneurons
What does continuity without contact refer to?
Refers to fact that neurons do not touch. (No electrical transmission
How is information transferred from one neuron to next?
Chemicals called neurotransmitters
What is a connection between two neurons?
Synapse
At the end of each axon branch is what?
Terminal bulb
Neurotransmitters are stored in bundles called?
Synaptic vesicles
Where are synaptic vesicles located
Terminal bulbs
What is thickened layer of terminal bulb called where neurotransmitters pass?
Presynaptic membrane
What is space between terminal bulb of first neuron and dendrite of 2nd neuron?
synaptic cleft
What is portion of membrane of 2nd neuron, nr terminal bulb of 1st neuron?
postsynaptic membrane
