Brain & Hormones(Plant and Animal Hormones) // Biology Revision скачать в хорошем качестве

Brain & Hormones(Plant and Animal Hormones) // Biology Revision

In this lecture, we decode the "Control and Coordination" system of living organisms. We cover the intricate structure of the Human Brain and the vital role played by Hormones in both plants and animals. Using the exam-proven notes of Parmar Sir, we focus on the specific functions of brain parts (like the Hypothalamus and Cerebellum) and the hormonal triggers that regulate growth, stress, and metabolism. This is a must-watch for SSC CGL, CHSL, Railway, and State PCS aspirants. Key Topics Covered: Human Brain: Forebrain, Midbrain, and Hindbrain functions. Animal Hormones: The Endocrine system (Pituitary, Thyroid, Adrenal, etc.). Plant Hormones (Phytohormones): Auxins, Gibberellins, Cytokinins, ABA, and Ethylene. Credits: A special thanks to Parmar Sir for his brilliantly structured GS notes, which helped in simplifying these complex biological processes for this lecture. #Biology #HumanBrain #Hormones #ParmarSir #SSCGS #ScienceRevision #GeneralScience Topic Explanation & Revision Highlights 1. The Human Brain The brain is the central information processing organ of our body. Forebrain: * Cerebrum: Largest part; seat of intelligence, memory, and logic. Hypothalamus: Controls body temperature, hunger, and thirst (the "Master of Master Gland"). Midbrain: Controls visual and auditory reflexes. Hindbrain: Cerebellum: Maintains posture and body balance (affected by alcohol). Medulla Oblongata: Controls involuntary actions like heartbeat, breathing, and blood pressure. 2. Plant Hormones (Phytohormones) Plants don't have a nervous system, so they rely entirely on hormones for coordination. Auxin: Helps in cell elongation and phototropism (bending towards light). Gibberellins: Responsible for stem elongation and breaking seed dormancy. Cytokinins: Promotes cell division (found in high concentrations in fruits/seeds). Abscisic Acid (ABA): The "Stress Hormone"; inhibits growth and closes stomata. Ethylene: The only gaseous hormone; responsible for fruit ripening. 3. Animal Hormones (Endocrine System) Hormones are chemical messengers secreted directly into the blood. Pituitary Gland: Known as the "Master Gland." Thyroid Gland: Secretes Thyroxine (needs Iodine); controls metabolism. Adrenal Gland: Secretes Adrenaline (the "Fight or Flight" or 3F hormone). Pancreas: Both Exocrine and Endocrine. Secretes Insulin (lowers blood sugar) and Glucagon (raises blood sugar).