Nervous Tissue Flashcards
what is basic nerve cell of nervous system
neuron
what is the function of a neuron
transmit signal from point A to point B to cause a physiological response
a collection of multiple neurons
a nerve
what makes up the structure of a neuron
- dendrite
- cell body
- axon
what is the function of a dendrite
-receive stimuli from internal & external sources
what is the function of the neuron cell body
- process stimuli/signal
- provide energy/nutrients
what is the function of the axon
to transmit signal to target tissue/structure
how many dendrites & axons does a neuron have
- dendrites vary in number
- only one axon per neuron
what is the membrane that surrounds the axon of a neuron
myelin sheath
what is a myelin sheath
Multiple layers of a Bilayer of Phospholipids membrane
what produces the myelin sheath
Schwann Cells
what is the grey matter
area that contains cell bodies and dendrites
what is the white matter
area that contains axons with the myelin sheath
where is the grey matter found
- cortex of brain
- central region of spinal cord
where is the white matter found
everywhere in nervous system
what is the function of the myelin sheath
Allows signals to move at great speeds along a neuron’s axon
what are targets for a neuron
- organ
- muscle
- glands
- other neurons
what origin points for neuron
- muscles
- organs
- structure
what are the characteristics neuroglial cells
~non-impluse conducting cells
~supports and binds neurons
-supply nutrients by connecting neurons to blood vessels
what are some examples of neuroglial cells & their functions
- Schwann cells: produce the myelin sheath
- Astrocytes: function in blood-brain barrier
- Ependymal cells: produce Cerebral Spinal fluid
