48. In human endocrine systems, which one is NOT correct description? (A) Metamorphosis in flatfishes and in amphibians is controlled by growth hormone. (B) Vitamin D is a hormone produced in part by exposure to sunlight. (C) If blood sodium levels rise sharply above normal limits the heart will release more atrial natriuretic peptide. (D) Insulin's effects on reducing blood glucose levels are counteracted by glucagon's actions, which increase blood glucose. (E) It would be reasonable to assume that environmental cues such as photoperiod and temperature might regulate animal reproduction.