AimMent

For Class 8, 9 & 10

Foundation - a strong base in Physics, Chemistry, Maths & Biology

Concept-first questions with clear model answers across all four subjects, aligned to NCERT. Start early, build the habit, and walk into your board exams, NEET and JEE already ahead.

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SubjectAllPhysics 19Chemistry 19Biology 19Mathematics 27
ChapterAllAcids, Bases and SaltsArithmetic ProgressionsCarbon and its CompoundsChemical Reactions and EquationsCirclesControl and CoordinationCoordinate GeometryElectricityHeredity and EvolutionHow do Organisms ReproduceIntroduction to TrigonometryLife ProcessesLight - Reflection and RefractionMagnetic Effects of Electric CurrentMetals and Non-metalsOur EnvironmentPair of Linear Equations in Two VariablesPolynomialsProbabilityQuadratic EquationsReal NumbersSome Applications of TrigonometryStatisticsSurface Areas and VolumesThe Human Eye and the Colourful WorldTriangles

Showing 1 question for Class 10. Tap a card to reveal the answer.

BiologyControl and Coordinationmedium

What is a reflex arc? Trace the path of a reflex action when you touch a hot object.

Reveal answer ↓

What it is

A reflex arc gives an instant, automatic response through the spinal cord - no thinking needed.

Answer

A reflex arc is the pathway followed by a nerve impulse during a reflex action, allowing a quick automatic response without conscious thought. When you touch a hot object, receptors in the skin send an impulse along a sensory neuron to the spinal cord; there a relay neuron passes it to a motor neuron, which carries the impulse to the muscles of the hand, causing you to pull your hand away instantly.

Receptor -> Sensory -> Spinal cord -> Motor -> Effector

  • •Receptor -> sensory neuron -> spinal cord
  • •Relay neuron -> motor neuron -> effector (muscle)
  • •Fast, automatic, protects the body
  • •Processed by spinal cord, not brain

Why learn this

It protects you in a split second (a hot pan, a sharp pin) before the brain even reacts.

💡 Memory trick

Receptor -> Sensory -> Spinal cord -> Motor -> Effector. The spinal cord shortcuts the brain.