blood brain barrier Flashcards
What do the tight junctions do in the BBB
They seal together to endothelial cells of brain blood capillaries
The capillaries purpose
they carry in or carry out substances of the CNS
What is the process the substances must go through to enter or exit
They must go through the endothelial cells and a thick basement membrane
Purpose of astrocytes
They press up against the capillaries and secrete chemicals that control the permeability of the endothelial cells
blood brain barrier
blood borne substances are kept separate from the neurons in the brain by the
Parasympathetic Division
The division most active when the body is at rest or not threatened
Releases a neurotransmitter called acetylcholine
Parasympathetic Division
Sympathetic Division nickname
Flight or fight
