Hormones Beyond Endocrine Glands
❤️ Heart Hormone
- Atrial Natriuretic Factor (ANF): Made by the heart’s upper chambers (atria)
- Job: Lowers high blood pressure by relaxing blood vessels
- ✨ Cool fact: Your heart acts like a pressure sensor and hormone factory!
🫘 Kidney Hormone
- Erythropoietin: Made by special kidney cells (juxtaglomerular cells)
- Job: Tells your body to make more red blood cells
- 💡 Remember: More red blood cells = better oxygen delivery!
🍽️ Gut Hormones (GI Tract)
Your digestive system makes four key hormones:
- Gastrin → Tells stomach to release acid and digestive juices
- Secretin → Tells pancreas to release watery fluid with bicarbonate (neutralizes acid)
- CCK (Cholecystokinin) → Tells pancreas to release enzymes AND tells gallbladder to squeeze out bile
- GIP (Gastric Inhibitory Peptide) → Slows down stomach activity and acid release
🚀 Teamwork alert: These hormones work together like a food-processing assembly line!
⚡ How Hormones Work
- Hormones fit into special “locks” (receptors) on target cells
- Two receptor locations:
- On cell surfaces (membrane-bound receptors)
- Inside cells (intracellular receptors, often in the nucleus)
- When hormone + receptor connect → They form a hormone-receptor complex
- This complex triggers changes in the cell’s activities
🔑 Key point: Each hormone only fits its specific receptor – like a key in a lock!
🌟 Top 5 NEET Must-Knows
- ANF = ❤️ hormone → Lowers blood pressure
- Erythropoietin = 🫘 hormone → Makes red blood cells
- Gastrin → Stomach acid booster
- CCK → Pancreas & gallbladder activator
- Hormones work via specific receptors → Form hormone-receptor complexes
💪 You’ve got this! Remember how each hormone is like a specialized messenger with its own mission!
