This chapter will go through the NCERT Solutions for Class 7 Science Chapter 2 questions and answers. Nutrition is a necessary process for all living things, and this chapter will give you a thorough explanation of the principles you need to understand in order to completely comprehend the issue and its associated themes. We’ll start by talking about the function of nutrition in animals, and then we’ll look at the many types of nutrients that are necessary for their health and growth. We will also examine the many phases of digestion, the importance of metabolism, and how it works in animals in the CBSE Class 7 Science Chapter 2 additional questions.
In addition, we will examine the distinctions between autotrophic and heterotrophic feeding, as well as the distinctions between carnivorous and herbivorous animals. Finally, we will go through some of the topic’s additional questions and offer you extensive answers. By the conclusion of Class 7 Chapter 2 Science, you should have a much better grasp of animal nutrition and be able to answer any questions about it.
Discover Fascinating Topics of Digestion and Nutrition.
Learn intriguing things about nutrition and digestion.
Learn fascinating information about digestion and nutrition. The class 7 science chapter 2 question and answer from NCERT teaches students that an adult human has 32 teeth in total. The large intestine absorbs partially digested food as liquid, the small intestine absorbs fully digested food as solid, the tongue tastes the meal, and the liver secretes bile juice. In the mouth cavity, there are glands called salivary glands that create saliva.
A blindfolded test to identify the beverages presented in two distinct glasses teaches us that taste receptors on the tongue can help us recognise two different drinks.
We should not eat too quickly since we may have hiccups, coughing, or choking. The inner lining of the stomach secretes mucus, hydrochloric acid, and digestive fluids, according to Class 7 Chapter 2 Science. The mucus produced shields the stomach lining from the action of hydrochloric acid.
The Process Through Which Food is Absorbed During Digestion
Students also discover that the small intestine is coiled inside our bodies and is roughly 7.5 metres in length. The small intestine receives the digestive fluids from the liver and pancreas, which aids in full food digestion and absorption. Egestion is the process through which the anus removes the undigested faeces waste.
Food’s basic components are carbohydrates (glucose), fats (glycerol and fatty acids), proteins (amino acids), and vitamins (Vitamins).
Starch is broken down by salivary glands in the mouth, whereas lipids are broken down by bile secreted by the liver. Juices from the pancreas break down proteins, lipids, and carbs into simpler substances.
Here is an experiment involving boiling rice from the Class 7 cbse Science Chapter 2 Extra Questions. Boojho put boiling rice grains in test tube “A,” but Paheli placed cooked and eaten rice in test tube “B.” Subsequently, a few droplets of iodine solution were added to the tubes and they both observed a colour alteration. What colour change would they have seen?
The results of the tests were as follows: In test tube A, a dark blue colour appeared due to the presence of starch.
The colour of the iodine in test tube B will remain the same since saliva in our mouths convert starch into sugars.
The Digestive Systems of Herbivores and Carnivores are Different from One Another.
Herbivores have longer small intestines than carnivores because they must digest cellulose, which requires more time, according to NCERT Solutions for Class 7 Science Chapter 2 Question Answer. Hurriedly swallowing their meal and storing it in the rumen of their stomachs, ruminants like cows and buffaloes allow microbes to partially digest it. The animal returns the partially digested food to the buccal cavity and chews it there to finish the digestive process, a process known as rumination.
The Liver’s Role in Digesting
By generating bile, the liver plays a significant part in the digestion of lipids. It includes bile salts that break down big fat molecules into smaller droplets that can be turned into fatty acids and glycerol, as we learn in CBSE Class 7 Science Chapter 2 additional questions. Because cellulose cannot be digested by humans, cellulose-rich foods are an excellent source of roughage. The enormous surface area of the small intestine, which is generated by the finger-like projections known as villi, allows it to easily absorb digested food.
A Lesson Learnt About Hiccups
We learn that little Rishi (a sixth-grade student) was watching his favourite cartoon series on television. He began to get hiccups. His elder brother Shubham, who was sitting nearby, offered him a glass of water and advised him not to eat too quickly. Little Rishi was perplexed since he had heard that ‘hicki’ appears when someone recalls. His father explained that it was all a myth and gave him the true scientific explanation.
Hiccup is a choking sensation that causes a repetitive gulping sound. When we eat too quickly, talk too much, or laugh while eating, we get hiccups. As he inquired about the tale, little Rishi showed seriousness and inquiry.
Conclusion of Class 7 Chapter 2 Science
At Geneo the final Nutrition in Animals additional questions from CBSE Class 7 Science Chapter 2, which provide a thorough review of the many aspects of animal nutrition. It explains the digestive process, the many foods that animals eat, the need for a balanced diet, and the various nutrition delivery systems. The questions in this chapter help students examine their mastery of the subject and get a better understanding of the fundamentals of animal nutrition. This chapter is a crucial component of the science curriculum since it aids students in understanding the significance of animal nutrition.