Control and Coordination
Class 10 · Science
4 ideas in Class 10 Science, explained in plain words, with games and quizzes to practise.
Neurons and Reflex Responses
Part of: Nervous control
Receptors detect changes and start nerve impulses. Signals travel through neurons and across synapses. A reflex arc links input and output pathways for a quick response, often through the spinal cord.
Why it matters. Fast protective actions can reduce injury, while understanding the pathway helps distinguish reflexes from actions chosen after thought.
Try it in two minutes
- Trace a signal from a receptor to a muscle.
- Compare a reflex arc with a decision that requires thought.
- Name the part of a neuron that receives and sends a signal.
Try at home. Draw a simple route from a fingertip receptor to a muscle and label the spinal cord.
Brain Regions and Body Protection
Part of: Nervous control
The brain coordinates information and actions. The forebrain supports thinking and sensory interpretation, the cerebellum helps balance and precision, and the medulla controls several involuntary actions.
Why it matters. Different tasks need specialised control centres, and delicate nervous tissues need physical protection.
Try it in two minutes
- Match the forebrain, cerebellum and medulla with their roles.
- Compare a voluntary movement with an involuntary action.
- Trace how the skull and backbone protect nervous tissue.
Try at home. Use a simple body outline to mark where the brain and spinal cord are protected.
Plant Responses and Growth Hormones
Part of: Chemical coordination
Plants can respond quickly by changing water levels in cells or slowly by growing more on one side than another. Hormones such as auxin, gibberellin, cytokinin and abscisic acid coordinate plant growth.
Why it matters. Plant responses help stems reach light, roots grow through soil and tendrils attach to support, even though plants have no nervous system or muscles.
Try it in two minutes
- Compare a sensitive plant leaf response with a stem bending toward light.
- Trace why one side of a stem grows longer in one-sided light.
- Match the plant hormones with growth promotion or inhibition.
Try at home. Place a seedling near a window and predict how its stem and root directions differ.
Animal Hormones and Feedback
Part of: Chemical coordination
Endocrine glands release hormones into the circulating fluid. Hormones reach target tissues and produce effects, while feedback helps adjust how much hormone is released.
Why it matters. Hormonal signals can reach many tissues and coordinate longer-lasting changes such as preparing the body for action or regulating growth and glucose.
Try it in two minutes
- Trace adrenaline from its gland to two body effects.
- Match thyroid, pituitary and pancreas hormones with their roles.
- Explain how feedback changes insulin release as glucose levels change.
Try at home. Make a cause-and-effect chain from a rise in glucose level to a change in insulin release.
What your child will practise
- Animal Hormones and Feedback: Candy Quick Fire (Quick Fire)
- Animal Hormones and Feedback: Mission Control Quest (Collect the Answer)
- Brain Regions and Body Protection: Jungle Puzzle (Clue Puzzle)
- Neurons and Reflex Responses: Lab Explorer Quest (Collect the Answer)
- Plant Responses and Growth Hormones: Ocean Quick Fire (Quick Fire)
- Quiz: Animal Hormones and Feedback (8 questions)
- Quiz: Brain Regions and Body Protection (8 questions)
- Quiz: Neurons and Reflex Responses (8 questions)
- Quiz: Plant Responses and Growth Hormones (8 questions)