Chief cells ( stomuch) secreate pepsinogen , a inactivae enzyme. And in small intestine it converted into pepsin ,active form. Chief cell also present in parathyroid gland release pth harmone regulates level of calcium, magnesium, HPO4 ions in blood.
In the United States, afternoon is generally the time between noon and 5:00 p.m., and evening is considered anything after 5:00 p.m. There is no set allocation for afternoon and evening, however.
the exact time of evening and night. The answer to this question will vary depending on the season, as the winter months have shorter days and the summer months have longer days. Furthermore, there is no standard set of times that are universally accepted That being said, here is my classification of times: Morning is from sunrise to 11:59 AM.