Final answer:
The pituitary gland secretes luteinizing hormone (LH), which promotes ovulation and corpus luteum development, critical for the reproductive cycle and pregnancy. The pancreas contains beta and PP cells in its islets of Langerhans, producing insulin and pancreatic polypeptide, respectively, which are important for glucose metabolism.
Step-by-step explanation:
The Role of Hormones in the Human Body
The pituitary gland is a bean-sized organ that produces, stores, and secretes hormones in response to stimulation from the hypothalamus. One such hormone is luteinizing hormone (LH), an anterior pituitary hormone that stimulates ovulation and the development of the corpus luteum, which in turn secretes progesterone. This hormone is pivotal in the female reproductive cycle and maintenance of pregnancy. The pancreas, which has both exocrine and endocrine functions, contains a cluster of endocrine cells known as the islets of Langerhans. These clusters include PP cells that secrete pancreatic polypeptide and beta cells that produce insulin, a hormone essential for glucose metabolism. Insulin facilitates the uptake and utilization of glucose by target cells, as well as its storage.