Behind the first whisker in boys and the widening of hips in girls is a flood of _____,powerful chemical substances secreted by the endocrine glands and carried through the body by the bloodstream.
A)amino acids
B)phospholipids
C)enzymes
D)hormones

Question

Quizplus · Accepted Answer

The sentence explicitly states that the flood of substances is "secreted by the endocrine glands," which are responsible for producing and releasing hormones. Therefore, the best choice is hormones (option D). Amino acids (option A) and phospholipids (option B) are not typically classified as hormones, although they may play other important physiological roles. Enzymes (option C) are also not correct as they are not secreted by endocrine glands and do not regulate growth and development.

Behind the First Whisker in Boys and the Widening of Hips