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what do neurons/nerve cells consist of
 a cell body
What is included in a cell body?
nucleus, nerve fibers called dendrites, and single nerve fibers called a axon
What is the lipid covering of an axon called?
Myelin sheath
some of the cranial nerves are responsible for
special senses, such as sight hearing taste and smell
The somatic nervous system consist of what
12 pairs of cranial nerves and their branches 31 pairs of spinal nerves and their branches
what does the peripheral nervous system consist of?
Somatic nervous system and autonomic nervous system
after Cerebrospinal fluid circulates, what does it do?
It is absorbed into the blood vessels of the duma and returned to the bloodstream through special structures called the arachnoid villi
what does cerebrospinal fluid do?
Serves as a shock absorber Carries nutrients to some parts of the brain and spinal cord Helps remove metabolic products and waste
ventricles are filled with what
A fluid called Cerebrospinal fluid
How many ventricles does the brain have?
Four
Where does the spinal cord continue down from?
medulla oblongata and ends at the first or second lumbar vertebrae
How many divisions are in the autonomic nervous system?
Two
What does the autonomic nervous system maintain and do?
maintains a balance in the involuntary functions of the body and allows the body to react in times of emergency
The _______ nervous system is an important part of the _____ nervous system
automatic and peripheral
how is Hydrocephalus treated?
by the surgical implantation of a shunt(tube) between the ventricles, the veins heart or abdominal peritoneal cavity(stomach) to provide for drainage of excess fluid
what is TPA?(tissue plasminogen activator)
thrombolytic or “clotbusting “drugs Can dissolve blood clots and restore blood flow to the brain
When a CVA occurs what can prevent brain damage?
Immediate care within the first three hours
What is the cell body?
-nucleus nerve fibers called DENTRITES -that carry impulses toward the cell body single nerve fibers called AXON - that carry impulses away from the body
What do dendrites do?
Carry impulses toward the cell body
What do axons do?
Carry impulses away from the cell body