I think protonion is a subatimic particle
Answer:
The barrier functions to regulate the chemical composition of the extracellular fluid surrounding the brain cells.
Explanation:
Blood-brain barrier
It is a very selective semipermeable membrane , hence allow some specific substance to pass via it . This barrier separates the extracellular fluid in the central nervous system and the circulating blood from the brain .
<u>The barrier is composed of the endothelial cells .</u>
Passive diffusion is shown in this system , and allows molecules like the water , glucose , amino acid to pass .
It regulates the chemical composition of the fluid of brain cell .
~Hello there! ^_^
Your question: Which nerve branches from the semicircular canals, and runs through the cochlea, and transmits sound and equilibrium?
Your answer: Vestibulocochlear nerve is the nerve branch that if from the semicircular canals, and run through the cochlea, and then transmits sounds and equilibrium.
Hope this helps~
The function of the respiratory system is to exchange two gases: oxygen and carbon dioxide.
Hope this helps :)
