Summary: Nervous Tissue
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4 Nervous tissue
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What is the afferent system?
Sensory information, registers changes in the enviroment -
What is the efferent system?
Motor commands, gives commands to muscle for a reaction/movement -
What are the 6 different morphologies of neurons?
1. Cortical pyramidal cell
2. Retinal bipolar cell
3. Retinal ganglion cell
4. Retinal amacrine cell
5. Neurons in mesencephalic nucleus of cranial nerve V
6. Cerebellar Purkinje cells -
In which 2 ways do neurons communicate to eachother?
1. Through chemical messengers (neurotransmitters) in the synapses
2.Gap junctions (electrical synapses) -
Where are chemical messengers found?
In the axons, presynaptic, in vesicles (tiny sacs in the cell) -
How and when are chemical messengers released?
Via exocytose are the chemical messengers released. They are released after an electric stimulus -
What is the result of the release of a chemical messenger?
It results in the activation of neurotransmitter receptors that are on the postsynaptic membrane -
How is the tube of the synaps calles?
The telodendrion -
How is the outside layer of the synaps called?
The synaptic knob -
Which 2 cell organels can be found in a synaps?
1. Mitochondrion
2. Endoplasmic reticulum
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