What accounts for the blood-brain barrier How lipophillic and lipophobic substan
ID: 3480226 • Letter: W
Question
What accounts for the blood-brain barrier
How lipophillic and lipophobic substances cross the blood brain barrier
What is the difference between gray matter and white matter
List the different layers of the meninges
What type of nerves are in ascending tracts, descending tracts of the spinal cord; name the different ascending and descending tracts
What is meant by a mixed nerve, a sensor nerve, a motor nerve
What is the function of the gray matter in the CNS
What is a dermatome and how might it be used clinically
What is the difference between afferent and efferent neurons; where are the cell bodies of each located
What is a homunculi and what does the different size of the picture mean
What is the function of the reticular formation and the neurotransmitters involved
Explanation / Answer
What accounts for the blood-brain barrier
Answer:
The blood–brain barrier consists of a complex cellular system of endothelial cells lining brain capillaries and astrocytic end feet
How lipophilic and lipophobic substances cross the blood brain barrier
Lipophilic: small, lipid soluble molecules that cross the BBB by transmembrane diffusion.
lipophobic substances: such as glucose and essential amino acids pass through carriers proteins.
What is the difference between gray matter and white matter
Grey matter is made up of nerve cell bodies, while the white matter is made up of fibers (Myelin is sheath gives white appearance for the white matter).
List the different layers of the meninges
dura mater, arachnoid mater, and pia mater
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