Hypothalamus produces certain neurosecretory hormones which influence the production of various stimulating hormones secreted by the pituitary gland. These hormones, in turn, stimulate the production of hormones of certain other important endocrine glands. Pituitary glands stimulate the glands to produce the hormones only according to the need of the body.
So hypothalamus indirectly helps in maintaining homeostasis. For example, during summer when water has to be retained in the body vasopressin is produced which will enhance the reabsorption of water from urine and they maintain the water level in the body. Calcium level is also maintained by the decrease and increase production of calcitonin and parathormone. In short
- Changes in the internal environment affects the rhythm of life activities.
- Secretion of hormones is increased or decreased according to the changes.
- Life activities are regularised this way.
- Thus hypothalamus prepares the body to overcome different situations and maintain a normal balance.
