Archive | Hormones

Let us make an in-depth study of the mechanism of hormone action with feedback regulation of hormone production. Mechanism of Hormone Action: 1. Enhancement of enzyme synthesis: The steroid hormones and the thyroid hormones enter the cell and combine with the specific receptor protein to form 'receptor protein-hormone complex'. This complex will then bind to a specific site on DNA [...]

Living organisms control and coordinate their activities through complex chemical signals. In multicellular organisms adjacent cells communicate through plasmodesmata (in plants) and gap junctions (in animals). But, a cell can communicate distant cells by releasing variety of signal molecules such as paracrine signals (neurohormones), endocrine signals (hormones), synaptic signals (neurotransmitters) and gaseous signals (e.g. NO, Nitric Oxide). Many organisms release [...]