Selina Solutions Class 8 Biology Solutions for Exercise Long Answer Questions (LA) in Chapter 7 - Nervous System

Question 6 Long Answer Questions (LA)

Q6) Differentiate between natural reflex and conditioned reflex. Give examples to illustrate your answer.


Solution :

Reflexes are of two types:-

(1) Natural (inborn) reflex:-Is one in which no previous experience or learning is required.These reflexes are inborn ,i.e.inherited from the parents.Example

  • Blinking and watering of eyes coughing,sneezing,vomiting: these are protective reflexes.
  • Salviation (when hungry),swallowing,peristalsis:provide functional efficiency.

(2) Conditioned (or acquired) reflex : Is one which develops during the lifetime due to experience or learning.Some examples of conditioned reflexes are :

  • Watering of mouth (salivation) at the sight of a favourite or tasty food.Here,as an acquired reflex,salivation occurs because our brain remembers the taste of the food due to a previous experience
  • Typing on the keyboard of a computer
  • Playing a musical instrument.
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