Answer:
I think it goona be A am I right or wrong
<span>The answer is a certain required chemicals must be actively
transported. Blood brain barrier is a
selective membrane that separates blood circulating from the brain and the
fluid of extracellular in the central nervous system. This is also called a
filtering mechanism, the capillaries that carry blood to the brain and spinal
cord tissue blocking the path way of the certain substance.</span>
Answer:
usually a scale used for grams
Explanation:
Answer:Hello My name is Marissa and im here to help!
Preservatives are natural or man-made chemicals that are added to foods to stop them from spoiling.
Explanation:hope this helps! brainliesst?
