Week 2- Microscopic Flashcards
Name 4 types of sensations
Nociception
Temperature
Touch
Postural
Name parts of a neuron
Axon
Axon terminal
Dendrites
Cell body
Myelin sheath
Nucleus
Node of ranvier
Schwann cells
What is the role of neurons
Signalling
What are neuroglia (glial cells)
Suppportive cells (both physically and chemically)
Maintain the environment
Bring nutrients and remove waste from neurons
What is a pseudo unipolar neuron
Single neuron that divides further in to 2 branches- T junction - and one to CNS and another to PNS
Found in dorsal root ganglia
Describe bipolar neuron
2 distinct structures extending from cell body
One is an axon
Other is dendrites
Describe a multipolar neuron
Single axon and many dendrites
Allow integration of a great deal of info from other neurons
Describe Golgi type 1 neuron
Long axon
Purkinje cells
Cerebral cortex
Describe Golgi type 2 neuron
Short axon
Cerebral cortex
Cerebellar cortex
What are axons often insulated by
Glial cells
What is the process of conduction fo ap across axons called
Saltatory conduction
What is a glial cells
A type of celll that provides physical and chemical suppor to neurons, maintains their environment
Located CNS and PNS
Name the 2 functions of neurotransmitters
Excitatory postsynaptic potentials (EPSPs)
Inhibitory postsynaptic potentials (IPSPs)
Have a role in neuronal growth and facilitation or inhibition of subsequent signalling properties of the neuron (can be use of spinal cord stimulation for chronic pain management)
Describe norepinephrine
Neurotransmitter most common for control of sympathetic functions
Cardiac and smooth muscle
What is astrocytes and where is it found
Glia
Blood brain barrier
What is EPENDYMAL cells and where is it found
Glia
Ventricles
What is oligodendrocytes cells and where is it found
Glia
Myelin production in CNS
What is microglia cells and where is it found
Removes cell debris
Pathogens that invade CNS |
Name neuroglia in PNS
Satellite cells-surround nerve cell bodies
Schwann cells- formmyelin
Describe white matter
CNS myelinated axons
Describe gray matter
CNS mainly made up of cell bodies
Name a muscular skeletal transmitter
Acetylcholine
Name neuroglia cells in CNS
Microglia- immune system
EPENDYMAL- make csf
Astrocytes- BBB
Oligodendrcytes- produce myelin
What is the difference between grey and white matter
Grey-not myelinated, made of neuron cell bodies
White- myelinated , neuron cell axons
