Question 1
At rest, a nerve cell has a high concentration of ____ inside and a high concentration of ____ outside.
◦ acetylcholine; chlorine
◦ sodium; potassium
◦ potassium; sodium
◦ calcium; phosphorus
◦ phosphorus; calcium
Question 2
Cerebrospinal fluid is secreted from
◦ capillaries inside ventricles in the brain.
◦ the spinal cord.
◦ the cerebellum.
◦ the medulla oblongata.
◦ the pons.