SUMMATIVE ASSIGNMENT For Practice A. Very Short Answer Type Questions (1 mark each) 1. Define nutrition. 2. Name the raw materials required for photosynthesis. 3. What do you mean by nutrients? 4. What type of nutrition is exhibited by Amoeba, Ascaris and Tapeworm. 5. Which muscles help in breathing movements in man. 6. Name the carrier that carries oxygen in the blood of human beings. 7. Name the respiratory organs of fish, prawn and cockroach. 8. How are grana and thylakoid inter-related? 9. How many lobes are present the left human lung? 10. What is the function of epiglottis?. 11. How is food ingested in Amoeba? 12. Define photosynthesis. 13. Which food constituent is digested in the mouth cavity of man? 14. In which organ of the body are the loops of Henle found? 15. Which organ secretes a hormone when the blood sugar rises. Name a digestive enzyme relased by this organ. 16. Write one feature which is common to each of the following pairs of terms/organs: (a) Glycogen and starch (b) Chlorophyll and haemoglobin 17. Where is blood oxygenated in fishes? 18. How Amoeba and other unicellular animals get rid of their nitrogenous wastes? 19. Mention the function of urinary bladder. 20. Name the valve present between right auricle and right ventricle. 21. What should be the ideal blood pressure for a normal adult man? 22. Which plant structures are associated with transpiration? 23. Name the four chambers of the human heart. 24. What is the function of haemoglobin? 25. Name two structures in plants where waste products get accumulated. 26. Write one feature which is common to each of the following pairs of terms/organs: (a) Gills and lungs (b) Arteries and veins B. Short Answer Type Questions (2 marks each) 1. What is fermentation? Give one example where fermentation occurs. 2. How does a saprophyte obtain its food? 3. What is the role of pepsin in the digestive process? At what pH does it work? 4. Differentiate between breathing and respiration. 5. Name the steps involved in various phases of photosynthesis.
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Define nutrition: **Nutrition** is the process by which organisms obtain and utilize the necessary nutrients for growth, maintenance, and reproduction. Show moreā¦
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QUESTION 21 Which of the following nutrients does NOT begin undergoing digestion until it reaches the small intestine? a. fat b. protein c. starch d. carbohydrates e. polypeptides QUESTION 22 The gas exchange that occurs in the alveoli requires a surface that is ___________. a. Ciliated b. Thin c. made of muscle tissue d. made of nervous tissue QUESTION 23 Why do humans need O2? a. O2 plays a role in obtaining energy from food b. O2 helps us synthesize proteins c. It is necessary to make CO2 d. It is necessary to deliver hemoglobin to the cells of the body QUESTION 24 Oxygen is mostly transported through the body _______. a. Dissolved in the blood b. Dissolved in the red blood cells c. Bound to hemoglobin d. Bound to carbon QUESTION 25 In the lungs, oxygen moves from the air to the blood by a. Diffusion b. Osmosis c. Facilitated diffusion d. Active transport e. Vesicular transport QUESTION 26 Over time the tar in cigarette smoke builds up in the smoker's lungs and is deposited on the walls of the alveoli. What effect will this have on the exchange of gases in the lungs? a. It will not have an effect because there is still a concentration gradient present between the lungs and blood. b. It will decrease the rate of diffusion because the respiratory surface is thicker than it normally is. c. It will inhibit the pressure changes required for air to flow into the lungs d. It will prevent the binding of oxygen to hemoglobin QUESTION 27 Match each organ of the digestive system to its function. secretes bicarbonate and digestive enzymes into the small intestine produces bile transports food from the pharynx to the stomach starch digestion begins here bile is stored here A. gallbladder B. pancreas C. esophagus D. mouth E. liver F. stomach QUESTION 28 The function of the sphincter at the downstream end of the stomach is to ______. a. release bile and pancreatic secretions into the duodenum when chyme is present b. release pancreatic secretions into the duodenum when chyme is present c. release bile into the duodenum when chyme is present d. retain acid chyme in the stomach until pepsin digestion is complete e. release acid chyme into the duodenum in periodic squirts QUESTION 29 Which of these play(s) a role in the digestion of lipids? a. nucleases b. pepsin c. amylase d. bile e. trypsin QUESTION 30 The main function of salivary amylase is to ______. a. absorb nutrients b. store food c. catalyze the formation of vitamins d. digest food e. moisten food
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What part of the nephron is at the arrow? Bowman's capsule proximal convoluted tubule collecting tubule loop of Henle distal convoluted tubule
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