Gabriel is in his Human Development class and is surprised to learn that he produces sperm cells and that an average of sperm are released during a single ejaculation.

Acell in the human nervous system whose primary function is to form myelin and the blood-brain barrier, respond to injury, remove debris, and enhance learning and memory is called a(n) cell.

Select the correct answer from each drop-down menu proteins are

Creating new things to solve problems and improve life depends on the close interaction of which two fields?