neurons Flashcards
1
Q
neurons
A
- information transfer
- respond to physical and chemical stimuli
- conduct electrochemical impulses
- release specific chemical regulators/ neurotransmitters
2
Q
Unipolar neurons
A
- not found in humans
- one axon
3
Q
pseudounipolar neurons
A
- found in humans
- one axon that splits into 2 branches
- sensory neurons
- one branch goes to CNS, one goes to PNS
4
Q
bipolar neurons
A
- have 2 branches
- found in specialized senses (retina, olfactory)
5
Q
multipolar neurons
A
- have multiple dendrytes off of cell body
- motor neuron
- interneurons
- most popular
6
Q
parts of neuron
A
- cell body (soma)
- dendrites
- axon
- axon hillock (trigger zone)
- axon collaterals
- axon terminal
7
Q
Neuron vs nerve
A
neuron : single nerve cell
nerve : group of axons plus connective tissue wrappings and blood vessels
8
Q
layers of nerve
A
- endoneurium (smallest)
- perineurium
(blood vessels)
-epineurium
9
Q
how do neurons communicate with each other
A
presynaptic neuron : sends info
postsynaptic neuron : receives info
-occurs between axon terminale and body of next neuron
10
Q
integral (transmembrane) proteins
A
transport things through cell membrane
