neurons

dendrites

specialised for receipt of information

axon

specialised for transmission of information

unique features of neurons

• cannot divide

• can trigger action potentials

• classified as excitable cells

• highly polarised

organelles of dendrite

rough er, ribosomes, golgi

structure of axon

long

untapered

branch at 90 degrees

structure of dendrite

short

tapered

branched

which matter is axon found in

grey and white

which matter is dendrite found in

grey

axon organelles

synaptic vessels

what causes polarity in neuron

• organelle difference between dendrite and axon

where are sodium and potassium channels found in a neuron

axon

where are calcium ion channels found in neuron

dendrites and axon

where are g protein coupled receptors found in neuron

axon and dendrite

where are ligand gated ion channels found in neuron

dendrite

where are glutamate receptors located

dendritic spines

are there ribosomes in axons

no

how are proteins transported to axon terminal

cytoskeleton

transports cargo to and from axons and dendrites

elements of the neuronal cytoskeleton

• microtubules

• neurofilaments

• microfilament

microtubules in cytoskeleton

• structure and support

• longitudinal

• polmyerisation/depolymerisation

• MAP2, Tau, Kinesin, Dyenin

role of kinesin protein

motor protein for vesicle transport in microtubule

role of dyenin

• moves back from terminal to cell body in transport

• microtubule based motor protein

neurofilament in cytoskeleton

• mechanical strength

• medium length

microfilaments in cytoskeleton

• smallest

• 5nm

• made of actin polymer

• mediate shape change

dorsal root neuroganglion is what classification

unipolar

what is neuronal classification based on

• morphology: bipolar, unipolar, multipolar

• function: sensory, motor, interneurons

repair of damage in pns

• schwann cells promote regrowth of axons