Lecture 1 hormones basics
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This document discusses hormones and their functions. It defines hormones as chemical messengers that travel through blood to target cells. It classifies hormones based on their structure, solubility, and distribution. It describes how hormones are secreted, synthesized, and transported. Hormones are secreted via neural, endocrinological or environmental pathways. They are synthesized from amino acids, cholesterol, or fatty acids. Hormones travel through blood and can be bound to proteins for transport. They act by binding to receptors located on cell membranes, in the cytoplasm, or cell nucleus.
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Lecture 1 hormones basics
- 1. DEPARTMRNT OF VETERINARY GYNECOLOGY AND OBSTETRICS COLLEGE OF VETERINARY AND ANIMAL SCIENCES RAJASTHAN UNIVERSITY OF VETERINARY AND ANIMAL SCIENCES BIKANER RAJASTHAN INDIA Hormones Basics
- 2. Hormones are chemical messengers that travel through blood to reach and affect target cells.
- 3. Classification of hormones Based on Structure Based on Solubility Based on distribution to sites of action
- 4. HORMONE SECRETION Neural Endocrinological Biological Environment and Photoperiod PULSATILE AND SURGE LIKE RELEASE Rate of production Positive and Negative Feedback
- 5. HORMONE SYNTHESIS Proteins and peptides from amino acids according to mRNA transcripts Steroids from cholesterol Prostaglandins from arachidonic acid (Fatty acids)
- 8. Hormone transport Endocrine hormones →Blood →Cell Steroids, thyroid hormones, androgens and estrogens →Bound to SHGB Progesterone, cortisol and Corticosteroids → Bound to transcortin Corticoids → Bound to CBG
- 9. Mechanism of action of hormones The hormones bind to their receptors on or within the cell. Hormone receptors might be located: 1. In or on the surface of cell membrane, e.g. protein or peptide hormones and catecholamines. 2. In the cytoplasm, e.g. steroid hormones. 3. In the cell nucleus, e.g. thyroxine.
- 12. • The above lectures are also explained in video lectures at my YouTube Channel Govind Narayan Purohit • Kindly share the videos and subscribe to my channel if you like them • THANKS