chapter 6 case study nutrition

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Case Study Questions Class 10 Science Life Processes

Case study questions class 10 science chapter 6 life processes.

At Case Study Questions there will given a Paragraph. In where some Important Questions will made on that respective Case Based Study. There will various types of marks will given 1 marks, 2 marks, 3 marks, 4 marks.

CBSE Case Based Questions Class 10 Science Chemistry Chapter 6

CASE STUDY : 1

Carbon and energy requirements of the autotrophic organism are fulfilled by photosynthesis. It is the process by which autotrophs take in substances from the outside and convert them into stored forms of energy. This material is taken in the form of carbon dioxide and water which is converted into carbohydrates in the presence of sunlight and chlorophyll. Carbohydrates are utilised for providing energy to the plant.

i) Write a chemical reaction which occur during photosynthesis?

Ans: 6CO2 +12H2O + Chlorophyll & sunlight👉 C6H12O6 + 6O2 + 6H2O

ii) In which form of carbohydrates does the plant stored in them?

Ans: The carbohydrates are stored in the form of starch as the internal energy.

iii) What is stomata?

Ans: The process present in the surface of a leaf or the stem of a plant to allow the exchange of gases.

iv) What are the functions of stomata?

Ans: i) Exchange of gases i.e oxygen and CO2

ii) Transpiration

v) What is Chloroplast?

Ans: Chloroplast is a cell organelles which contains photosynthetic pigment called as chlorophyll which help in the absorption of sunlight.

CASE STUDY : 2

The alimentary canal is basically a long tube extending from the mouth to the anus. In Fig. 6.6, we can see that the tube has different parts. Various regions are specialised to perform different functions.

We eat various types of food which has to pass through the same digestive tract. Naturally the food has to be processed to generate particles which are small and of the same texture. This is achieved by crushing the food with our teeth

i) Which enzyme is present in our mouth to digest starch?

Ans: Salivary amylase from salivary glands.

ii) What are the types of enzymes released by our stomach?

Ans: Hydrochloric acid, pepsin and a mucus.

iii) Which is the longest part of our alimentary canal in our body?

Ans: Small intestine

iv) What are villi?

Ans: Villi are finger like projection present inside the inner lining of the small intestine which increases the surface area for absorption.

v) What are the enzymes that are released by pancreas?

Ans: Enzyme released by pancreas – • trypsin- Digestion of protein

lipase – breakdown of emulsified fats

CASE STUDY : 3

The food material taken in during the process of nutrition is used in cells to provide energy for various life processes. Diverse organisms do this in different ways – some use oxygen to break-down glucose completely into carbon dioxide and water, some use other pathways that do not involve oxygen (Fig. 6.8). In all cases, the first step is the break-down of glucose, a six-carbon molecule, into a three-carbon molecule called pyruvate. This process takes place in the cytoplasm.

i) What is anaerobic respiration?

Ans: The conversion of pyruvate into ethanol, CO2 & energy take place in the absence of air(oxygen), it is called anaerobic respiration.

ii) Explain the process which happen in our muscle cells?

Ans- The conversion of pyruvate to lactic acid( 3 carbon molecule) and energy due to the lack of oxygen.

iii) In which form our body used the energy?

Ans: It is in the form of ATP molecule i.e Adenosine Triphosphate.

iv) Why there is a faster breathing rate of aquatic animals then the terrestrial animals?

Ans- The amount of O2 dissolved in water is low as compared to amount of O2 present in air. Therefore, aquatic animals have faster breathing rate.

v) Write the name of organ used for respiration by different organism- fish, frog?

Ans- i) fish- gills

ii) frog- skin, lungs

CASE STUDY : 4

The excretory system of human beings includes a pair of kidneys, a pair of ureters, a urinary bladder and a urethra. Kidneys are located in the abdomen, one on either side of the backbone. Urine produced in the kidneys passes through the ureters into the urinary bladder where it is stored until it is released through the urethra.

i) What is the purpose of making urine?

Ans: Urine is to filter out the blood i e to remove waste product from the blood such as urea.

ii) What is Bowman’s capsule?

Ans: A cup shaped end of a coiled tube which is associated with capillaries to collect filterate.

iii) What is dialysis?

Ans: To remove nitrogenous waste from your blood by using machine when kidney does not its function i.e in case of kidney failure.

iv) What is the function of urinary bladder?

Ans: It is used to stored urine until the pressure comes from the brain to pass it out.

v) What are the different parts of nephrons?

Ans: Renal artery, Bowman’s capsule, glomerulus, tubular part of nephron and a collecting duct.

CASE STUDY : 5

The heart is a muscular organ which is as big as our fist. Because both oxygen and carbon dioxide have to be transported by the blood, the heart has different chambers to prevent the oxygen-rich blood from mixing with the blood containing carbon dioxide. The carbon dioxide-rich blood has to reach the lungs for the carbon dioxide to be removed, and the oxygenated blood from the lungs has to be brought back to the heart. This oxygen-rich blood is then pumped to the rest of the body.

i) How many chambers are present in the heart of mammals and reptiles?

Ans: Mammals- 4 chamber heart and reptiles- 3 chambered heart

ii) Who carry deoxygenated blood from body to heart?

Ans: Vena cava carries deoxygenated blood from body to heart.

iii) What do you meant by the term double circulation?

Ans: The blood goes through the heart twice during each cycle known as double circulation.

iv) What is hypertension?

Ans: The force that blood experts against the wall of a vessels is called hypertension or high blood pressure.

V) Which device measured blood pressure?

Ans: Sphygmomanometer

CASE STUDY : 6

Plant transport systems will move energy stores from leaves and raw materials from roots. These two pathways are constructed as independently organised conducting tubes. One, the xylem moves water and minerals obtained from the soil. The other, phloem transports products of photosynthesis from the leaves where they are synthesised to other parts of the plant

i) What are the different parts of xylem?

Ans: vessels, tracheids, xylem parenchyma and fibres.

ii) What do you meant by the term transpiration?

Ans: The loss of water in the form of vapour from the aerial parts of the plant.

iii) What are the advantages of transpiration?

Ans: i) help in the absorption and the upward movement of water

ii) temperature regulation

iv) What is translocation?

Ans: The transport of soluble products of photosynthesis is called translocation.

v) How does plant remove their waste product?

Ans: They remove their waste product in the form of fallen leaves, resins and gums.

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Case Studies

Case studies #1.