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Ncert Solutions For Class 10th Ch 6 Life Processes Science Map,Ncert Solutions Class 10th Geography Chapter 1,Fishing Tackle Shops Online Works - 2021 Feature

NCERT Solutions for class 10 science chapter 6 Life processes - LearnFatafat

Our aim is to ncert solutions for class 10th ch 6 life processes science map students learn subjects like physics, maths and science for students in schoolcollege and those preparing for eolutions exams. All right reserved. All material given in this website is a property of physicscatalyst. Life processes class 10 ncert solutions Science In this page we have Life processes 10tg 10 ncert solutions Chapter 6 Science.

Hope you like them and do not forget to likesocial share and comment at the end of the page. Practice Question Question 1 Which among the following is not a base? A For every hormone there is a gene B For production of every enzyme there is a gene C For every molecule of fat there is a gene D For every protein there is a gene View Results.

Physicscatalyst Our aim is to help students learn subjects like physics, maths and science for students ncert solutions for class 10th ch 6 life processes science map schoolcollege and those preparing for competitive exams. Legal Privacy Policy Terms of Use. Email us at [email protected]. Food is obtained directly or indirectly scirnce autotrophs.

This food is broken down with help of enzymes. Example: All green plants and Some bacteria have this type of nutrition. The respiratory pigments hemoglobin present in red blood cells takes up the oxygen from the air to lungs.

They then carry the oxygen to cells and tissues which are different in oxygen. Carbon dioxide is more soluble in water. Hence, it is mostly transported from the body tissues in the dissolved form in our blood plasma to lungs where diffuses from blood to air in the lungs and then expelled out through nostrils.

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Formation of lactic acid in muscles causes cramp. How is oxygen and carbon dioxide transported in human beings?

They carry the oxygen to tissues which are deficient in oxygen. Hence, it is mostly transported from body tissues in the dissolved form in our blood plasma to lungs where it diffuses from blood to air in the lungs and then expelled out through nostrils. How are the lungs designed in human beings to maximize the area for exchange of gases? Answer Lungs contain millions of alveoli which provide a surface for the exchange of gases.

An extensive network of blood vessels is present in the wall of the alveoli. By lifting our ribs and flatten the diaphragm, the chest cavity becomes spacious. Air is sucked into the lungs and alveoli.

The oxygen from the breath, diffuses into the blood and CO 2 from the blood brought from the body, diffuses out into the air. What are the components of the transport system in human beings? What are the functions of these components? Answer The main components of the transport system in human beings are the heart, blood, and blood vessels.

It receives deoxygenated blood from the various body parts and sends this impure blood to the lungs for oxygenation. Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds? Answer It is necessary to separate oxygenated and deoxygenated blood to maintain efficient supply of oxygen into the body.

This system is essential in animals that have high energy need. For example, animals like mammals and birds which constantly use this energy to maintain their body temperature.

What are the components of the transport system in highly organised plants? Answer In highly organised plants, there are two different types of conducting tissues - xylem and phloem.

Xylem conducts water and minerals obtained from the soil via roots to the rest of the plant. Phloem transports food materials from the leaves to different parts of the plant body. How are water and minerals transported in plants? Answer Water and minerals are transported through xylem cells from soil to the leaves. The xylem cells of roots stem and leaves are interconnected to form a conducting channel that reaches all parts of the plant.

The root cells take ions from the soil. This creates a difference between the concentration of ions of roots and soil. Therefore, there is a steady movement of water into xylem. An osmotic pressure is formed and water and minerals are transported from one cell to the other cell due to osmosis.

The continuous loss of water takes place due to transpiration. Because of transpiration, a suction pressure is created as a result of which water is forced into the xylem cells of roots. The effect of root pressure for transportation in plants is more important in night while during day time transpiration pull becomes the major driving force. How is food transported in plants? Answer Phloem transports food materials from the leaves to different parts of the plant.

The transportation of food in phloem is achieved by utilizing energy from ATP which helps in creating osmotic pressure that transport food from the area of high concentration to low concentration. Describe the structure and functioning of nephrons. Answer Nephrons are the basic filtering units of kidneys.

Each kidney possesses large number of nephrons, approximately The main components of the nephron are glomerulus, Bowman's capsule, and a long renal tubule. Collecting duct collects urine from many nephrons. From ureter, it gets transported to the urinary bladder and then into the urethra. What are the methods used by plants to get rid of excretory products? Answer Plants can get rid of excess of water by transpiration.

Waste materials may be stored in the cell vacuoles or as gum and resin, especially in old xylem. It is also stored in the leaves that later fall off.

How is the amount of urine produced regulated? Answer The amount of urine produced depends on the amount Ncert Solutions For Class 10th Science Chapter 6 Eng of excess water and dissolved wastes present in the body. Some other factors such as habitat of an organism and hormone such as Anti-diuretic hormone ADH also regulates the amount of urine produced. Page No: Excercise 1. The kidneys in human beings are a part of the system for a nutrition. The xylem in plants are responsible for a transport of water.

The autotrophic mode of nutrition requires a carbon dioxide and water. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in a cytoplasm.

How are fats digested in our bodies? Where does this process take place? Answer Fats are present in the form of large globules in the small intestine. The small intestine receives the secretions from the liver and the pancreas.

The bile salts from the liver break down the large fat globules into smaller globules so that the pancreatic enzyme lipase can easily act on them. This is referred to as emulsification of fats. This process takes place in the small intestine. What is the role of saliva in the digestion of food? What are the necessary conditions for autotrophic nutrition and what are its by-products?

Answer Autotrophic nutrition takes place through the process of photosynthesis. Carbon dioxide, water, chlorophyll pigment, and sunlight are the necessary conditions required for autotrophic nutrition.

Carbohydrates food and O 2 are the by-products of photosynthesis. What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration. Answer Aerobic respiration Anaerobic respiration It occurs in the presence of O 2. It occurs in the absence of O 2. It involves the exchange of gases between the organism and the outside environment.

Exchange of gases is absent. It occurs in cytoplasm and mitochondria. It occurs only in cytoplasm. It always releases CO 2 and H 2 O. End products vary. How are the alveoli designed to maximise the exchange of gases?

Answer Alveoli provide a surface for the exchange of gases. What would be the consequences of a deficiency of haemoglobin in our bodies? Answer Haemoglobin is the respiratory pigment that transports oxygen to the body cells for cellular respiration.

Therefore, deficiency of haemoglobin in blood can affect the oxygen supplying capacity of blood. This can lead to deficiency of oxygen in the body cells. It can also lead to a disease called anaemia. Describe double circulation in human beings.

The main components of the transport system in human beings are the heart, blood, and blood vessels. Heart pumps oxygenated blood throughout the body.

It receives deoxygenated blood from the various body parts and sends this impure blood to the lungs for oxygenation. Being a fluid connective tissue, blood helps in the transport of oxygen, nutrients, CO 2 , and nitrogenous wastes. The blood vessels arteries, veins, and capillaries carry blood either away from the heart to various organs or from various organs back to the heart.

Warm-blooded animals such as birds and mammals maintain a constant body temperature by cooling themselves when they are in a hotter environment and by warming their bodies when they are in a cooler environment. Hence, these animals require more oxygen O 2 for more cellular respiration so that they can produce more energy to maintain their body temperature.

Thus, it is necessary for them to separate oxygenated and de-oxygenated blood, so that their circulatory system is more efficient and can maintain their constant body temperature. Xylem conducts water and minerals obtained from the soil via roots to the rest of the plant. Phloem transports food materials from the leaves to different parts of the plant body.

The components of xylem tissue tracheids and vessels of roots, stems, and leaves are interconnected to form a continuous system of water-conducting channels that reaches all parts of the plant. Transpiration creates a suction pressure, as a result of which water is forced into the xylem cells of the roots.

Then there is a steady movement of water from the root xylem to all the plant parts through the interconnected water-conducting channels. The transportation of food in phloem is achieved by utilizing energy from ATP. As a result of this, the osmotic pressure in the tissue increases causing water to move into it. This pressure moves the material in the phloem to the tissues which have less pressure. This is helpful in moving materials according to the needs of the plant.

For example, the food material, such as sucrose, is transported into the phloem tissue using ATP energy. Nephrons are the basic filtering units of kidneys. Each kidney possesses large number of nephrons, approximately The blood enters the kidney through the renal artery, which branches into many capillaries associated with glomerulus.

In the proximal tubule, some substances such as amino acids, glucose, and salts are selectively reabsorbed and unwanted molecules are added in the urine. From here, the filtrate moves upwards into the distal tubule and finally to the collecting duct.

Collecting duct collects urine from many nephrons. The urine formed in each kidney enters a long tube called ureter. From ureter, it gets transported to the urinary bladder and then into the urethra.

Plants can get rid of excess of water by transpiration. Waste materials may be stored in the cell vacuoles or as gum and resin, especially in old xylem. It is also stored in the leaves that later fall off.

The amount of urine produced depends on the amount of excess water and dissolved wastes present in the body. Some other factors such as habitat of an organism and hormone such as Anti-diuretic hormone ADH also regulates the amount of urine produced. Fats are present in the form of large globules in the small intestine.

The small intestine gets the secretions in the form of bile juice and pancreatic juice respectively from the liver and the pancreas. The bile salts from the liver break down the large fat globules into smaller globules so that the pancreatic enzymes can easily act on them.

This is referred to as emulsification of fats. It takes place in the small intestine. Saliva is secreted by the salivary glands, located under the tongue. It moistens the food for easy swallowing. It contains a digestive enzyme called salivary amylase, which breaks down starch into sugar. Autotrophic nutrition takes place through the process of photosynthesis.

Carbon dioxide, water, chlorophyll pigment, and sunlight are the necessary conditions required for autotrophic nutrition. Carbohydrates food and O 2 are the by-products of photosynthesis. What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration. Aerobic respiration. It always releases CO 2 and H 2 O.

Anaerobic respiration occurs in the roots of some waterlogged plants, some parasitic worms, animal muscles, and some micro-organisms such as yeasts. The alveoli are the small balloon-like structures present in the lungs. The walls of the alveoli consist of extensive network of blood vessels.

The alveolar surface when spread out covers about 80 m 2 area. This large surface area makes the gaseous exchange more efficient. Haemoglobin is the respiratory pigment that transports oxygen to the body cells for cellular respiration.

Therefore, deficiency of haemoglobin in blood can affect the oxygen supplying capacity of blood. This can lead to deficiency of oxygen in the body cells.

It can also lead to a disease called anaemia. The heart has superior and inferior vena cava, which carries de-oxygenated blood from the upper and lower regions of the body respectively and supplies this de-oxygenated blood to the right atrium of the heart. The right atrium then contracts and passes the de-oxygenated blood to the right ventricle, through an auriculo-ventricular aperture. Then the right ventricle contracts and passes the de-oxygenated blood into the two pulmonary arteries, which pumps it to the lungs where the blood becomes oxygenated.

From the lungs, the pulmonary veins transport the oxygenated blood to the left atrium of the heart. Then the left atrium contracts and through the auriculo-ventricular aperture, the oxygenated blood enters the left ventricle. The blood passes to aorta from the left ventricle.

The aorta gives rise to many arteries that distribute the oxygenated blood to all the regions of the body. The separation of oxygenated and de-oxygenated blood allows a more efficient supply of oxygen to the body cells. This efficient system of oxygen supply is very useful in warm-blooded animals such as human beings. As we know, warm-blooded animals have to maintain a constant body temperature by cooling themselves when they are in a hotter environment and by warming their bodies when they are in a cooler environment.

Hence, they require more O 2 for more respiration so that they can produce more energy to maintain their body temperature. Thus, the circulatory system of humans is more efficient because of the double circulatory heart. Transport of materials in xylem. Compare the functioning of alveoli in the lungs and nephrons in the kidneys with respect to their structure and functioning.

It also contains a cluster of thin-walled capillaries. Then the filtrate moves through the proximal tubule and then down into the loop of henle. The collecting duct collects the urine from many nephrons and passes it to the ureter. During the flow of filtrate, some substances such as glucose, amino acids, and water are selectively re-absorbed.

The following two modes of nutrition in living organisms are discussed: Autotrophic nutrition Heterotrophic nutrition 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.

Page No Question 1: Why is diffusion insufficient to meet the oxygen requirementsof multi-cellular organisms like humans? Answer: Multicellular organisms such as humans possess complex body designs.

Video Solution for life processes Page: 95 , Q. Question 2: What criteria do we use to decide whether something is alive? Answer: Any visible movement such as walking, breathing, or growing is generally used to decide whether something is alive or not.

Question 3: What are outside raw materials used for by an organism? Answer: An organism uses outside raw materials mostly in the form of food and oxygen. Question 4: What processes would you consider essential for maintaining life? Answer: Life processes such as nutrition, respiration, transportation, excretion, etc. Question 1: What are the differences between autotrophic nutrition and heterotrophic nutrition?

Answer: Autotrophic nutrition Heterotrophic nutrition i Food is synthesised from simple inorganic raw materials such as CO 2 and water. Video Solution for life processes Page: , Q. Question 2: Where do plants get each of the raw materials required for photosynthesis? Question 3: What is the role of the acid in our stomach?

Answer: Following are the roles of acid in our stomach: 1. Question 4: What is the function of digestive enzymes? Answer: Digestive enzymes such as amylase, lipase, pepsin, trypsin, etc.

Question 5: How is the small intestine designed to absorb digested food? Answer: The small intestine has millions of tiny finger-like projections called villi. Question 1: What advantage over an aquatic organism does a terrestrial organism have with regard to obtaining oxygen for respiration? Answer: Terrestrial organisms take up oxygen from the atmosphere whereas aquatic animals need to utilize oxygen present in the water.

Question 2: What are the different ways in which glucose is oxidized to provide energy in various organisms? Answer: Glucose is first broken down in the cell cytoplasm into a three carbon molecule called pyruvate. The breakdown of glucose by different pathways can be illustrated as follows. Question 3: How is oxygen and carbon dioxide transported in human beings? Question 4: How are the lungs designed in human beings to maximize the area for exchange of gases?

Answer: The exchange of gases takes place between the blood of the capillaries that surround the alveoli and the gases present in the alveoli. Question 1: What are the components of the transport system in human beings? Answer: The main components of the transport system in human beings are the heart, blood, and blood vessels.

Question 2: Why is it necessary to separate oxygenated and deoxygenated blood in mammals and birds? Answer: Warm-blooded animals such as birds and mammals maintain a constant body temperature by cooling themselves when they are in a hotter environment and by warming their bodies when they are in a cooler environment. Question 3: What are the components of the transport system in highly organised plants?

Question 4: How are water and minerals transported in plants? Answer: The components of xylem tissue tracheids and vessels of roots, stems, and leaves are interconnected to form a continuous system of water-conducting channels that reaches all parts of the plant. Components of xylem tissue Video Solution for life processes Page: , Q.

Question 5: How is food transported in plants? Answer: Phloem transports food materials from the leaves to different parts of the plant body. Components of phloem tissue Video Solution for life processes Page: , Q. Question 1: Describe the structure and functioning of nephrons.





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