Blood brain and cerebrospinal fluid barrier

Question 1

What substances pass enter the brain with ease

Answer 1

water
oxygne
carbon dioxide

Question 2

What are most brain capillaries surrounded by

Answer 2

a basement membrane

feet end of astrocytes

Question 3

What type of molecules can easily pass through the blood brain barrier

Answer 3

highly lipid soluble molecules

Question 4

What are some example of lipid soluble molecules that pass through the BBB

Answer 4

alcohol
nicotine
heroin

Question 5

What is different about the BBB in infants

Answer 5

the BBB is immature so it is much more permeable

Question 6

What three things in brain capillaries contributes to its decreased permeability

Answer 6

the tight junctions between cells
the continuous basement membrane
astrocytes

Question 7

What are some things that can increase permeability in the brain capillaries

Answer 7

trauma

infection

Question 8

What form the cerebrospinal fluid brain barrier

Answer 8

the ependymal cells of the choroid plexus

Question 9

What are some molecules that dont get past the cerebrospinal BB

Answer 9

medicaitions
large peptides
proteins

Question 10

What are some molecules that are actively transported into the CSF

Answer 10

proteins
sodium
Vit C and B6
folate