Hormones as Regulators
The inner environment of the body is maintained by the hormones. Therefore, when secretion of the hormones are under control of the other hormones it is known as feedback control. It is of two types:
- Positive Feedback control: It is defined as a process in which end products of action cause more of action which occur in a feedback loop. Example – menstrual cycle, blood clotting.
- Negative Feedback control: This is a type of process in which the regulation of the end product reduces the stimulus. Example – blood sugar regulation, temperature regulation.
Mechanism of Hormone Action – Notes CBSE Class 11
Mechanisms of Hormone Action are seen in the protein hormones such as Insulin, Adrenaline, TSH, and so on. These protein hormones are water soluble and they cannot pass through the cell membrane as it is made up of a lipid layer therefore this is known as a fixed membrane receptor mechanism whereas steroid hormones are made up of fats and are insoluble in water. These receptors are intracellular and can float in the cytoplasm on the nuclear membrane or inside the cell and due to this they are mobile receptor mechanisms.
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