Three constitutional limitations to the right to freedom of expression?​

(1)limitation must be within the constitutional power of government; (2) the limitation must further an important or substantial governmental interest; (3) the governmental interest must be unrelated to the suppression of the freedom of expression; and

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek