parts of neuron Flashcards
aka perikaryon/soma
Cell Body
Contains nucleus surrounded by cytoplasm, organelles such as lysosomes, mitochondria, Golgi complex.
Cell Body
contains free ribosomes and clusters of rough ER known as __________ which is the site for CHON synthesis.
Nissl bodies
________ are used to replace cellular components, material for growth of neurons, and regenerate axons in the PNS
CHONs
includes neurofibrils providing cell shape and support while microtubule assists in moving materials between cell body & axon.
cytoskeleton
a yellow to brown pigment that occurs in aging neurons is a product of neuronal lysosomes.
lipofuscin
a neuronal process that receives or input portions of neuron.
Dendrites
Contains numerous receptor sites for binding chemical messenger from other cells.
Dendrites
a neuronal process that propagates nerve impulse toward another neuron, muscle fiber, or gland.
Axon
is a cone shaped elevation of the cell body that joins with the axon
axon hillock
is the part of the axon closest to the hillock.
initial segment
AP arise in the junction of axon hillock and initial segment known as the
trigger zone
is the cytoplasm of the axon.
No rough ER, No CHON synthesis.
axoplasm
is the plasma membrane in the axon
axolemma
are the side branches
axon collaterals
(telodendria) are the fine processes when axon and collaterals divides.
axon terminals
is the site of communication between neurons or between a neuron and effector cells.
synapse
are the tips of axon terminals with swollen bumps called varicosities
synaptic end bulbs
contains tiny membrane-enclosed sacs that stores neurotransmitters.
synaptic vesicles
Can respond to stimuli and convert stimuli to electrical signals (nerve impulses or action potentials) that travel along neurons
Neurons
nucleus, cytoplasm with typical organelles
Cell body (perikaryon or soma)
highly branched structures that carry impulses to the cell body
Dendrites
receiving or input portions of a neuron
Dendrites
conducts away from cell body toward another neuron, muscle or gland
Axon
Emerges at cone-shaped axon hillock
Axon
contain synaptic vesicles that can release neurotransmitters
Axon terminals
