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.
The dictionary definition of afternoon is simply the hours between noon and evening. In the United States, the typical workday ends at 5:00 p.m.
For some, evening begins just before the sun begins to set, which is between 6:00 p.m. and 7:00 p.m. Still, for others, evening does not officially begin until sunset. In such places, 5:00 p.m. is still considered late afternoon.