1) The inner lining of stomach is protected by one of the following from hydrochloric acid. a) Pepsin b) (b) Mucus c) (c) Salivary amylase d) (d) Bile 2) Which part of alimentary canal receives bile from the liver? a) Stomach b) Small intestine c) Large intestine d) Oesophagus 3) A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains a) (a) Complex proteins b) (b) Simple proteins c) (c) Fats d) (d) Starch 4) In which part of the alimentary canal food is finally digested? a) (a) Stomach b) (b) Mouth cavity c) (c) Large intestine d) (d) Small intestine 5) When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of a) (a) Oxygen b) (b) Carbon dioxide c) (c) Nitrogen d) (d) Water vapour 6) During respiration exchange of gases take place in a) (a) Trachea and larynx b) (b) Alveoli of lungs c) (c) Alveoli and throat d) (d) Throat and larynx 7) What prevents backflow of blood inside the heart during contraction? a) (a) Valves in heart b) (b) Thick muscular walls of ventricles c) (c) Thin walls of atria d) (d) All of these

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