D.A.V. Public School Ballabhgarh Revision Assignment (Unit –test-1) Subject-Biology, Class-XI

Unit Covered- 5 ( Chapters:-1 Digestion & Absorption .2 Breathing and Exchange of Gases & Body fluids & circulation)

Q1. How is the intestinal mucosa protected from the acidic food entering from stomach? Q2. Differentiate between micelles and chylomicrons ? Q3. What’s sphincter of oddi ? Write its function. Q4. What’s peristalsis? Write its significance. Q5. Where are crypts of leiberkuhan located ?What role do they play? Q6. Why are human teeth referred as heterodonts & diphyodont ? Q7. Where’s carbonic anhydrase found in human body give its function. Q8. What is the difference between asthma and emphysema? Q9. Name the factors that affect the binding of oxygen to haemoglobin to form oxyhaemoglobin. Q10. How is the nucleic acid fraction of our food digested? Q11. How would it effect the digestion of protein if their a blockage in pancreatic duct ? Q12. Trypsin act at an alkaline PH. what provides this alkalinity ? Give two Functions of trypsin ? Q13. How does HCl in human stomach initiate protein digestion ? Q14. You had eaten boiled Rice at lunch time. Make a list of enzyme it will be acted upon & changes it undergoes before being absorbed in small intestine. Q15. Draw a labeled diagram of T .S. of human gut. Q16. Where’s pneumotaxic centre located ? What’s significance. in breathing ? Q17. Name the factors on which the dissociation of oxyhaemoglobin takes place in tissue? Q18. What’s emphysema ? What’s its major cause ? Q19. How’re respiratory gases transported in human blood ? Q20. Draw a labeled diagram of an alveolus with a pulmonary capillary. Q21. How does exchange of respiratory gorses takes place in alveoli of lung ? Q22. How carbondioxide is brought to lungs releases into alveoli. Q23. Name one enzyme of gastric juice one enzyme of pancreatic juice that released as pro enzyme in human alimentary canal, give the substrate and the end product of each? Q24. Draw a labeled diagram of the human duodenum and the duct system of the associated digestive glands pouring their secretion into it ? Q25. How does intestinal juice contribute to the digestion of protein in the small intestine ? Q26. How does the major nutrients in chapati eaten by you get digested and finally absorbed in alimentary canal ? Q27. Trace the main steps in the digestion of proteins through the alimentary canal in human beings ?

Q28. Describes the major disorders of human digestive system?

Q29. (1) What’s residual volume ? How much is it in a normal human adult ? (ii)Explain the role of diaphragm & rib case in inspiration & expiration.

Q29. Explain how the respiratory gasses transported in human body.

Q30. How is respiration regulated in human beings? Q31. What is the importance of plasma proteins? Q32. Explain the chemical events that takes place to form clot toseal the wound. Q33. Draw a labeled diagram to show the impulse conducting tissue system in human heart. Q34. Why is it necessary to check the Rh- factor of the blood of a pregnant woman? D.A.V. Public School Ballabhgarh Assignment (unit -5)

Chapters:- 1. Excretory product & their elimination. 2. Locomotion and Movement 3. Control and Coordination. (Nervous & Endocrine system )

( One Marks questions

Q1. What is vertebral formula of man Q2. Name the chemical causes fatigue in muscles. Q3. What lubricates the freely movable joint at shoulder ? Q4. Which chemical causes depolaristaion of sarcolemma at neuromuscular junction ? Q5. What is rheumatoid arthritis ? Q6. Name the cavity in the girdle into which the head of femur fits ? Q7. What is the composition of grey matter and white matter ? Q8. Which Nervous band connects the two cerebral hemispheres ? Q9. If neural connection of heart is severed then the mammalian heart will continue beating or not ? Q10. Why is blind spot devoid of ability of vision? Q11. Write the function of tictoral membrane and its location?

[2 Marks questions]

Q12. Why a red muscle fiber can work for a prolonged period while a white muscle fiber suffers a fatigue after a short period ? Q13. What is arthritis ? How it is caused ? Q14. What is synovial joint ? with the help of one example for each, point out the difference between a ball and socket joint and a pivot joint? Q15. Differential between polarized membrane and depolarized membrane. Q16. Name the three ear ossicles in the order of arrangement in human ear? What role do they play in hearing? Q17. What happen to the wall of DCT of nephron, When vasopressin is released by pituitary into blood stream ? Q18. Write any two types of endocrine cells which form the Islets of Langerhans? Name the hormone secreted by them also? Q19. In which human organ are the Leydig cells located ? What is the function of the secretion of these cell in the human body? 3 Marks questions

Q20. Why is adrenal gland called “Gland of Emergency”? Q21. How exocrine and endocrine gland differ ? What are heterocrine gland ? Q22. Write the names and functions of hormones produced by kidney, liver and testis ? Q23. Explain diagrammatically structure of cochlea of internal ear of man? Q24. Draw a diagram of V.S. of human eye and label any six parts ? Q25. What is the role of calcium ions, troponin and F-Action during contraction of striated muscles of humans ? Q26. How does muscle shorten during its contraction and lengthen during its relaxation ? Q27. Draw a schematic diagram to show reflex arc. Label the component of pathway

5 Marks questions

Q28. a) What is synapse ? How nerve impulse cross synopses b) Differentiate between afferent and efferent neuron. Q29. (1) Draw a section of the microscopic structure of human eye and label six parts of it. (2) Name the structure that determines the eye colour in humans. What is the normal function of this structure? (3) Name the point of sharpest vision and point of no vision in the eye. Q30. Name the hormone that regulates each of the following function. Also mention the source of it (1) Urinary elimination of water (2)Storage of glucose as glycogen (3) Sodium and potassium ion metabolism (4) Basal metabolic rate (5) Descent of testes in scortum. Q31. What are the seven principal hormones produced by the anterior pituitary? What function does each surve ? Q32. Explain the role of the following hormones with reference to hormonal control of human male reproductive system (1) GnRH (2) LH (3) Testo sterone (4) FSH. Q33. Terrestrial Animals are generally either ureotelic or uricotellic, not ammonotelic. Why? Q34. Explain the mechanism of urine formation in a human being. Q35. (a)Give a brief account of counter current mechanism (b)Explain the autoregulatory mechanism of GFR.