nervous system (LAB) Flashcards
Contains nucleus surrounded by cytoplasm, organelles such as lysosomes, Mitochondria, Golgi complex
Cell body
What is the other name for rough ER
Nissl bodies
where is the site for CHON synthesis?
Nissl bodies
What is the use of CHONs?
used to replace organelles, growth of neurons, regenerate axons in the PNS
Define cytoskeleton
Providing cell shape and support while microtubule assist in moving materials between cell body & axon
Yellow to brown pigment
lipofuscin
occurs in aging neurons is a product of neuronal lysosome
lipofuscin
That has numerous receptor sites and chemical messenger from other cells
Dendrites
propagates nerve impulse towards another neuron, muscle fiber or gland
Axons
define axon hillock
joins axon
-closest to the hillock
-known as the trigger zone
initial segment
define axoplasm
-cytoplasm of the axon
-No rough ER, No CHON synthesis
plasma membrane of the axon
axolemma
define axon collaterals
side branch
when axon and collateral divides
axon terminals
define synapse
communication between neurons or between a neuron and effector cells
tips of the axon terminal
synaptic end bulbs
swollen bumps
varicosities
define synaptic vesicles
tiny membrane-enclosed sacs that stores neurotransmitters
continuous with spinal cord
brain stem
superior to brain stem
diencephalon
Largest part and most superior
Cerebrum
posterior and inferior, “little brain”
cerebellum
dura, mater, arachnoid mater, pia mater
cranial meninges
