SEBA Class 7 Science Important Chapter 10 Life Processes in Animals

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SEBA Class 7 Science Important Chapter 10 Life Processes in Animals

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Life Processes in Animals

Chapter: 10

PART – II

IMPORTANT QUESTION ANSWER

Short Type Question and Answers:

1. What are life processes? 

Ans: Life processes are basic activities performed by every living organism, such as nutrition, respiration, excretion, and reproduction, which are essential for survival.

2. Where does digestion begin in the human body? 

Ans: Digestion begins in the mouth, where food is broken down into smaller pieces through mechanical digestion and mixed with saliva.

3. What is the role of saliva in the digestion of carbohydrates? 

Ans: Saliva contains digestive juices that help in the conversion of starch into sugar, making starchy foods like rice or potato taste sweet after chewing.

4. How does the stomach protect its inner lining from the acid it secretes? 

Ans: The stomach secretes mucus, which protects the stomach wall from the hydrochloric acid used to break down proteins and kill germs.

5. What is bile, and where is it produced? 

Ans: Bile is a mild base produced by the liver; it helps neutralise stomach acid and breaks down fats into small droplets for easier digestion.

6. What are villi, and what is their function? 

Ans: Villi are thousands of finger-like projections in the inner lining of the small intestine that increase the surface area for efficient nutrient absorption into the blood.

7. What is the primary function of the large intestine? 

Ans: The large intestine is responsible for absorbing water and salts from the leftover undigested food before the waste is prepared to leave the body.

8. Define rumination. 

Ans: Rumination is the process where animals like cows and buffaloes bring back partially digested food (cud) from their stomach to their mouth to be chewed again.

9. What is the role of the diaphragm during inhalation? 

Ans: During inhalation, the diaphragm moves downward, which increases the space in the chest cavity, allowing the lungs to fill with air.

10. How do earthworms breathe? 

Ans: Earthworms take in oxygen and release carbon dioxide through their moist skin, which helps them survive in their environment.

Fill in the Blanks:

1. The food pipe that connects the mouth to the stomach is called the ____________.

Ans: Oesophagus.

2. The small intestine is nearly ___________ and is the longest part of the digestive canal.

Ans: 6 meters long.

3. ___________ is a juice secreted by the liver that helps in breaking down fats.

Ans: Bile.

4. The actual exchange of gases in the human lungs takes place in tiny sacs called_____________.

Ans: Alveoli.

5. The process of breaking down glucose to release energy is called____________.

Ans: Respiration.