Control and Coordination Class X Revision questions

CONTROL  AND  COORDINATION

1.       Name two tissues in animals which help in control and coordination

2.       What is a receptor?

3.       Name the receptors which help to detect taste and smell.

4.       How does nerve impulse travel in our body?

5.       What is a reflex arc? Show it with the help of a diagram.

6.       What is the significance of reflexes? Give examples of reflexes.

7.       Trace the sequence of events which occur when your hand touches a hot object.

8.       Trace the sequence of events which occur when a bright light is focussed on your eyes?

9.       What is the role of brain in reflexes?

10.   What are the components of central nervous system? How does CNS communicate with other parts of the body?

11.   Which part of the brain is responsible for sensation of hunger and thirst?

12.   Draw a well labelled diagram of human brain.

13.   State the functions of various parts of brain.

14.   Differentiate between reflexes and involuntary and voluntary activities giving examples.

15.   How is nervous tissue protected?

16.   How does the nervous tissue cause action?

17.   What happens at synapse between two neurons?

18.   How do we detect the smell of an incense stick?

19.   Discuss the kind of movement shown by plants with examples.

20.   How do plant cells change shape?

21.   Explain the role of auxins in tropisms.

22.   How do auxins promote the growth of tendril around a support?

23.   Compare and contrast nervous and hormonal means of coordination.

24.   Give the functions of growth promoting hormones. Give examples

25.   Give the function of growth inhibiting hormone. Give examples.

26.   Design an experiment to demonstrate hydrotropism.

27.   State the functions of adrenaline.

28.   Why is it important to have iodised salts?

29.   What causes dwarfism?

30.   Which hormones are responsible for changes happening in your body in puberty?

31.   How does the body ensure that hormones are secreted in precise amount as deficiency as well as excess of hormones cause diseases?

32.   Which hormone regulates blood sugar levels?

33.   What do you understand by the feedback mechanism?

34.   What is the function of receptors in our body? Think of situations where receptors do not work properly. What problems are likely to arise?

35.   Which signal will get interrupted in case of spinal cord injury?

36.   What is the need for a system of control and coordination in plants?

Life processes revision sheet- 2 for class X

44.   Draw a well labelled diagram of human heart.

45.   State the function of components of blood.

46.   Why do ventricles have thicker walls?

47.   Explain significance of double circulation.

48.   Name the organism in which blood goes only once through the heart in one cycle.

49.   Name the organism which has two chambered heart.

50.   Why is it necessary to separate oxygenated and deoxygenated blood in birds and mammals?

51.   What is blood pressure?

52.   Give the value of systolic and diastolic blood pressure.

53.   Name the instrument which measures blood pressure.

54.   What is hypertension and what can be its impacts?

55.   What would happen if blood would leak from a blood vessel? Explain how is it fixed?

56.   What is tissue fluid? Give its composition. State its functions.

57.   Why do plants need a proper transportation system?

58.   Why do plants have low energy needs?

59.   Explain the transport of water in plants.

60.   State three importance of transpiration for a plant.

61.   Does root pressure play any role in transport of water in plants?

62.   Define translocation.

63.   Explain the difference between transport of water and food in plants.

64.   Define excretion.

65.   How is urine produced?

66.   Draw a well labelled diagram of human excretory system.

67.   Name the filtration units in kidneys.

68.   Name few factors which can reduce the activity of kidneys.

69.   Give the value of initial filtrate as well as final urine output per day in humans.

70.   Explain hemodialysis with the help of a diagram.

71.   What are the methods used by plants to get rid of excretory wastes.

72.   How the amount of urine is produced regulated?

73.   Explain the difference in respiration in plants and animals.

74.   What is the role of saliva in digestion of food?

75.   Compare the functioning of alveoli in lungs and nephrons in the kidneys with respect to their structure and functioning.

Revision questions for classX

LIFE PROCESSES

1.       How do we tell the difference between what is alive and what is not?

2.       Is the invisible molecular movement necessary for life?

3.       Why are molecular movements needed for life?

4.       What are life processes?

5.       Life on earth depends on ----------------------based molecules.

6.       Most chemical reactions in body are -------------------

7.       Simple diffusion is not enough for multicellular organisms.

8.       Why do we need transportation system?

9.       Give two examples of autotrophs and heterotrophs. Also bring out the differences between the two modes of nutrition.

10.   State the function of biocatalysts.

11.   Define photosynthesis and write a balanced equation for it.

12.   Name the internal energy reserve in plants and animals.

13.   Explain the events that occur during photosynthesis.

14.   How do desert plants photosynthesise?

15.   Give two examples of variegated leaves.

16.   State two functions of stomata. How is opening and closing of stomata regulated? Draw a well labelled diagram.

17.   How do plants obtain other raw materials?

18.   What are the green dots in a leaf cell

19.   Give two examples of parasites and saprophytes each.

20.   Comment: Form of nutrition differs depending on the type and availability of food material.

21.   Explain nutrition in amoeba.

22.   What is the difference in which food is obtained by amoeba and paramecium?

23.   Activity 6.3

24.   Discuss the digestion of food in mouth.

25.   Define peristalsis. Does peristalsis occur only in oesophagus?

26.   Explain digestion of food in stomach.

27.   State the function of HCl and mucus in stomach.

28.   What is acidity?

29.   Why do herbivores have longer small intestine?

30.   Small intestine is the site of complete digestion of carbohydrates, proteins and fats.

31.   What is a villus? What is its function? Or How is small intestine designed to absorb digested food?

32.   What is dental caries?

33.   Activity 6.5

34.   What are the various ways in which glucose is broken down?

35.   State the function of ATP. How much energy is released when one terminal phosphate of ATP is broken?

36.   Why do aquatic organisms have higher breathing rates?

37.   List the characteristics of respiratory surface.

38.   Why is nasal breathing better than mouth breathing?

39.   Draw the diagram of respiratory system.

40.   Explain how breathing takes place.

41.   How is oxygen and carbon dioxide transported?

42.   How are lungs designed in human beings to maximise the area for exchange of gases.

43.   State the amount of Hb in men and women