CBSE – 7th Standard Science

Question Bank – Chapter 2 – Nutrition in Animals


Nutrition in Animals

Q.1- Where do animals get their food?

Animals get their food from plants, either directly by eating plants or indirectly by eating animals that eat plants.

Q.2- What is digestion?

The breakdown of complex components of food into simple soluble substance is called digestion.


Q.3- What does the human digestive system consists of?

Digestive system consists of a continuous canal and associated glands.


Q.4- What are the organs involved in alimentary canal?

Alimentary canal comprises of buccal cavity, foodpipe or oesophagus, stomach, small intestine, large intestine, rectum and anus.


Q.5- What is ingestion?

The process of intake of food into the body is called ingestion.


Q.6- What is buccal cavity?

Buccal cavity contains teeth and tongue.


Q.7- What are the function of teeth?

Teeth help in cutting, tearing and grinding of food.


Q.8- What is the location and function of tongue?

Tongue is a muscular organ attached to the floor of the buccal cavity. It helps in mixing up of saliva with food and also helps in swallowing food.


Q.9- What does the saliva do?

The saliva breaks down the starch into sugars.


Q.10-What does the stomach secretes?

The inner lining of stomach secretes mucous, hydrochloric acid and digestive juices.


Q.11- What is the function of HCL acid and digestive juice?

The hcl acid kills the bacteria that enter along with the food and makes the medium in the stomach acidic and helps the digestive juices to act. The digestive juices break down the proteins into simpler substances.


Q.12- Which is the largest gland in the body?

Liver is the largest gland in the body.


Q.13- Which juice does the liver secretes?

Liver secretes the bile juice which plays an important role in the digestion of fats.


Q.14- What is absorption?

The process of passing of digested food into the blood vessels is called absorption.

Q.15- What are villi?

The inner walls of the small intestine have thousands of finger-like outgrowths. These are called villi.


Q.16- What is the function of villi?

The villi help in absorption by increasing the surface area of the digested food. The absorbed substances are transported to different organs via blood vessels.


Q.17- What is assimilation?

The absorbed food is utilized by the body for growth and formation of body parts. This is known as assimilation.


Q.18- What is the function of large intestine?

The function is to absorb water and some salts from the digested food material.


Q.19- What is egestion?

The elimination of undigested food from the alimentary canal is known as egestion.


Q.20- What are ruminants?

The grazing animals like cows, buffaloes and deer are known as ruminants.


Q.21- What is cud?

Partially digested food that is chewed again by grass eating animals is called cud.


Q.22- What do you mean by rumination?

The repetitive chewing of small amounts of food from the stomach is called rumination.


Q.23- What is amoeba? Where are they found?

Amoeba is microscopic single-celled organism.They are found in moist soil, ponds and lakes.


Q.24- How do amoeba ingests its food?

Amoeba ingests its food with the help of finger like projection called pseudopodia.


Q.25- What does pseudopodia mean?

ANS- Pseudo means false and podia means feet, therefore pseudopodia are the false feet of amoeba.