LAKHMIR SINGH & MANJIT KAUR|Exercise COMMUNICATION SKILL -BASED QUESTIONS|1 Videos
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LAKHMIR SINGH & MANJIT KAUR|Exercise Long Answer Questions (Carrying 5 marks each)|1 Videos
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What substance is mixed with food in the mouth during chewing by the teeth ?
When a person puts food in his mouth, then teeth cut it into small pieces, shew and grind it. The glands A in the mouth secrete a substance B which is mixed with the food by tongue. The substance B contains an enzyme C which starts the digestion of food in the mouth. The slightly digested food from the mouth goes down a tube D. The special type of movements E in the walls of tube D push the food into stomach for further digestion. The stomach wall secretes gastric juice containing three substance F, G and H. One of the functions of F is to kill bacteria which may enters the stomach with food. The substance G protects the inside layer fo stomach from the damaging effect of substance F whereas substance H is an enzyme for digestion. The partially digested food then enters into small intestine for further digestion. (a) What is (i) gland A (ii) substance B, and (iii) enzyme C ? (b) Name the tube D. (c) What is the movement E known as ? (d) What are (i) F (ii) G, and (iii) D ?
What is the pH of our stomach ?
Lysozyme kills bacteria by destroying their:
LAKHMIR SINGH & MANJIT KAUR-WHY DO WE FALL ILL?-LONG ANSWER QUESTION
