Q U E S T I O N S
What are the differences between autotrophic nutrition and heterotrophie
nutrition?
Where do plants get each of the raw materials required for photosynthesis?
What is the role of the acid in our stomach?
What is the function of digestive enzymes?
How is the small intestine designed to absorb digested food?
Answers
Answer:
Autotrophic nutrition
Heterotrophic nutrition
(i). Food is prepared from CO2, water and sunlight
(i). Food is obtained from other organisms.
(ii). Chlorophyll is required.
(ii). Chlorophyll is not required.
(iii). All green plants and some bacteria have this type of nutrition.
(iii). All animals and fungi have this type of nutrition.
(iv). Food is generally in day time.
(iv). Food can be obtained at all time.
Question 2. Where do plants get each of the raw materials required for photosynthesis?
Ans. Light energy from sun, carbon dioxide from air and water from soil.
Question 3. What is the role of the acid in our stomach?
Ans. HCl creates the acidic medium which facilitates the action of enzyme pepsin
Question 4. What is the function of digestive enzymes?
Ans. Digestive enzymes such as amylase, lipase, pepsin, trypsin, etc. help in the breaking down of complex food particles into simple ones. These simple particles can be easily absorbed by the blood and thus transported to all the cells of the body
Question 5. How is the small intestine designed to absorb digested food?
Ans. To digest the carbohydrates, fats and proteins, the small intestine receives the secretions of the liver and pancrease. The acidic food coming from the stomach is made alkaline for the action of pancreatic enzymes. The liver secretions have bile juice. The bile salts break the larger fat globules into the smaller one for the effective action of enzymes (emulsification of fats). The walls of small intestine contain glands which secrete intestinal juice. This contains enzymes to convert: Proteins àamino acids Complex Carbohydrates àglucose Fats àfatly acids & glycerol The digested food components are absorbed into the walls of the intestine.
Explanation:
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Answer:
The diagrammatic representation of the cross-section of the leaf and the open and closed stomatal pore is included under the autotrophic mode of nutrition. It also talks about the important factors essential to bring about the process of photosynthesis. The process of nutrition in amoeba and human beings is described along with their schematic view. Additional information on dental caries is also provided in the chapter. The process of respiration is also explained in detail in the chapter, Life Processes. The breakdown of glucose by various pathways in the human body is discussed. A schematic view of the human respiratory system is covered in the chapter. Subsequently, the process of transpiration is dealt with in detail. A schematic sectional view of the human heart along with the transportation and exchange of oxygen and carbon dioxide in the human body is presented in the chapter. Similarly, the process of transportation of water, food and other substances in plants is also explained. The entire mechanism of excretion in humans is discussed with the help of a suitable diagram. Additional information on artificial kidney and organ donation is also provided in the chapter, Life Processes.