Nervous System

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A&P 1 John Barber

Neuroglial Cells

Cells that perform support functions for nerves.

Somatosensory

Somato motor Sensation of the muscle activity/Sensory Motor

How many Cranial Nerves do you have?

12

Sympathetic

Fight/Flight

Parasympathetic

Rest and digest "Eat food and fall asleep"

Enteric

Nervous system dedicated to the digestive trac

What is the meaning of Grey Matter

Nerve Cell body

Axon: Hillock

Where action potential starts

Axon: Terminals

End of Axon

Axon: Myelin Sheath (White Matter)

Fatty insulation around Axon and Dendrite

Axon: Schwann

Produce Myelin Sheath aka neurolemma cells in the PNS

Axon: Neurolemmal cells

Outer most layer of the Myolin sheath

Axon: Nodes of Ranvier

naket spot in the Axon. Non Mylated gaps

Gliocyloma

Brain Cancer. Glio cell out of control

Encephalitis

Infection for nerve cells in brain tissue

Meningitis

Inflammation of the menniges

Hydrocephalus

Water on brain. Blockage of duct system

Microglial cells

small cells that phagocytize bacterial cells and cellular debris

Ependymal Cells

Occur in clusters called Choroid Plexus. Produce cerebreal spinal fluid (CSF). CSF bathes the CNS

Astrocytes

Form blood barrier

Oligodendrocytes

Make myelin sheath within the CNS

Meninges

3 Layers of tissue which surround the CNS.
1. Dura Layer - Tough Layer
2. Arachnoid- Middle Layer
2a. Subarchnoid-Area between Pia and Arachnoid contains fluid
3. Pia- Intimately attached to CNS

Types of Meningitis and treatment

Bacterial -Antibiotics
Viral - Pallative care.

Symptoms of Meningitis

Fever/Head aches/ light sensitive/lifting head causes pain

Lateral Grey Horn

Where sympathetic nerve cell bodies are located (T1-L2

Pre Ganglionic neurotransmitters secret what?

ACH

Post Ganglionic neurotransmitters secret what?

ACH and Epinephrine

Adrenal Medulla

Fight/Flight - Secret adrenaline. Combination of epinephrine and norepinehrine

Alpha receptors react to what? what do they do?

React to Norepinephrine and regulate blood vessel dialation.

Beta receptors react to what? what do they do?

React to Epinephrine. Reduce the heart pump.

SSRI

Selective Serratonin Reuptake Inhibitor. Decreases rate of Serratonin break down in brain. Makes serratonin last longer.

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