Physics X - Chapter 07 - Control and Coordination
Chapter-wise Multiple Choice Questions with Instant Feedback
Quick Revision : Control and Coordination
- Neuron Structure: Dendrite (receives), Cell body, Axon (transmits), Synapse (junction).
- Reflex Action: Rapid, automatic response via spinal cord (e.g., knee jerk).
- Brain Parts: Cerebrum (thinking), Cerebellum (balance), Medulla (involuntary actions).
- Plant Hormones: Auxin (growth), Gibberellin (stem elongation), Cytokinin (cell division), Abscisic acid (stress), Ethylene (ripening).
- Plant Movements: Tropism (directional) – Phototropism (light), Geotropism (gravity), Hydrotropism (water), Chemotropism (chemicals).
- Nastic Movements: Non-directional, e.g., Mimosa leaf closure (thigmonasty).
- Endocrine Glands: Pituitary (master gland), Thyroid (metabolism), Adrenal (adrenaline), Pancreas (insulin).
- Key Hormones: Insulin (lowers blood sugar), Adrenaline (fight/flight), Thyroxine (metabolism), Growth hormone (height).
- Feedback Mechanism: Hormone regulation e.g., High thyroxine inhibits TSH secretion.
- Nervous vs Endocrine: Nervous – fast, electrical; Endocrine – slow, chemical.
- Iodine & Goitre: Iodine deficiency → low thyroxine → thyroid enlargement (goitre).
- Spinal Cord: Protected by vertebral column; center for reflex arcs.
- Hypothalamus: Links nervous & endocrine systems; controls pituitary.
- Receptors: Gustatory (taste), Olfactory (smell), Photoreceptors (light).
- Autonomic Nervous System: Controls involuntary functions; sympathetic (action), parasympathetic (rest).
Basic Level Questions
Chapter Summary: Control and Coordination
This chapter unlocks how living organisms detect changes and respond effectively. You'll explore the human nervous system—from neurons and reflex arcs to brain regions and their functions. You'll also dive into plant movements and hormones, understanding how they grow toward light or away from gravity. Additionally, you'll learn about the endocrine system—the chemical messengers like insulin and adrenaline that regulate everything from blood sugar to stress responses.
"Control and Coordination" is a high-scoring, diagram-rich chapter in CBSE Board Exams and competitive tests like NTSE and Olympiads. Expect questions on reflex arcs, brain parts, plant tropisms, hormone functions, and clinical disorders (e.g., diabetes, goitre). Diagrams of neurons, reflex pathways, and endocrine glands are frequently asked. Mastering this chapter ensures you can tackle both theory and application-based questions confidently.
Our platform transforms "Control and Coordination" into an interactive learning experience. With graded MCQs—from basic neuron structure to complex hormone interactions—you can systematically test your knowledge. Whether it's identifying brain functions, predicting plant growth responses, or analyzing endocrine disorders, our targeted practice sharpens recall, application skills, and exam speed. This focused preparation builds confidence and turns intricate biological systems into scoring opportunities.