In this article we will discuss about the regulation of PTH and calcitonin secretion. Decrease in plasma calcium level increases PTH secretion and when plasma calcium level increases, there will be increased secretion of calcitonin. (Fig. 6.52) Apart from the plasma calcium level, some of the other factors which can affect the secretion of PTH are: i. Decreased plasma magnesium [...]
In this article we will discuss about the actions of parathyroid glands. It is a hypercalcemic and hypophosphatemic agent. Hence increases the plasma calcium level and decreases plasma phosphate level. The important sites of actions of PTH are: 1. Bone 2. Kidney 3. GI tract in an indirect way. 1. PTH on Bone (Figs 6.50, 6.51 and Table 6.14): It [...]
The following points highlight the eight types of endocrine glands. The types are: 1. Pineal Gland 2. Thymus 3. Kidneys 4. Gastro-Intestinal Tract 5. Placenta 6. Heart 7. Liver 8. Skin. Type # 1. Pineal Gland: Pineal gland has a mass of 0.1—0.2 g. Origin: It develops from the ectoderm of the embryo. Location and Structure: The pineal gland is [...]