Control and Coordination Mind Map
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Visual Mind Map & Concept Tree (English)
Structured concept hierarchy, subtopic relationships, and exam revision tree.
Chapter: Control and Coordination
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Introduction
- Need for Control and Coordination
- Multicellular Organisms requirement
- Maintenance of Homeostasis
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Control and Coordination in Animals
- Nervous System
- Neurons (Structural & functional unit)
- Structure: Dendrites, Cell Body, Axon, Synapse
- Reflex Action
- Pathway: Reflex Arc
- Receptor $\rightarrow$ Sensory Neuron $\rightarrow$ Spinal Cord $\rightarrow$ Motor Neuron $\rightarrow$ Effector
- Human Nervous System
- Central Nervous System (CNS)
- Brain
- Forebrain (Thinking, voluntary actions, sensory processing)
- Midbrain (Involuntary reflexes)
- Hindbrain (Cerebellum, Pons, Medulla Oblongata)
- Spinal Cord
- Brain
- Peripheral Nervous System (PNS)
- Cranial Nerves (from brain)
- Spinal Nerves (from spinal cord)
- Autonomic Nervous System (ANS) (Involuntary organ control)
- Central Nervous System (CNS)
- Neurons (Structural & functional unit)
- Chemical Coordination (Endocrine System)
- Hormones (Chemical messengers)
- Major Endocrine Glands & Functions:
- Hypothalamus (Releasing hormones)
- Pituitary Gland (Master gland, Growth hormone)
- Thyroid Gland (Thyroxine - metabolism)
- Adrenal Gland (Adrenaline - fight or flight)
- Pancreas (Insulin & Glucagon - blood sugar)
- Testes (Testosterone - male sex hormone)
- Ovaries (Estrogen & Progesterone - female sex hormones)
- Feedback Mechanism (Regulation of hormone timing and amount)
- Nervous System
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Coordination in Plants
- Independent of muscles and nerves
- Nastic Movements
- Non-directional movements
- Example: Thigmonasty in Mimosa pudica (touch-me-not plant)
- Tropic Movements
- Directional growth movements
- Phototropism (Response to light)
- Geotropism (Response to gravity)
- Hydrotropism (Response to water)
- Chemotropism (Response to chemicals, e.g., pollen tube growth)
- Plant Hormones (Phytohormones)
- Auxin (Cell elongation, phototropism)
- Gibberellins (Stem elongation, seed germination)
- Cytokinins (Cell division)
- Abscisic Acid (Inhibits growth, wilting of leaves/stress hormone)