| 1. | Oxygenated blood returns from lungs to the heart through ? | |
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Pulmonary artery
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Coronary artery
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Pulmonary vein
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Coronary vein
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Report Question| 2. | Mammals are said to have double circulation. It means ? | |
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There are two systems, one from the heart to the lungs and back to hte rest of the body
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Blood vessels are paired
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The blood circulates twice through the heart
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There are two types of blood vessels attached to every organ
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| 3. | The smallest blood vessel in the body is ? | |
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Vena cava
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Capillary
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Vein
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Artery
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| 4. | The enzyme Pepsin is inactive in stomach without the presence of ? | |
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Butyric acid
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Acetic acid
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Hydrochloric acid
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Nitric Acid
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| 5. | Which is the correct sequence of body parts in the human alimentary canal ? | |
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Mouth -> oesophagus -> stomach -> large intestine -> small intestine
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Mouth -> stomach -> oesophagus -> smallintestine -> large intestine
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Mouth -> stomach -> small intestine -> large intestine -> oesophagus
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Mouth -> oesophagus -> stomach -> small intestine -> large intestine
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| 6. | Roots of the plants absorb water from the soil through the process of ? | |
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transpiration
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osmosis
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diffusion
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None of these
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| 7. | In human each kidney has large numbers of filtration units called ___ ? | |
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Neptune
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Neurons
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Nephrons
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Neutrons
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| 8. | Villi present on the inner lining of the intestinal wall ? | |
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Decreases the surface area for absorption
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Secretes hormones
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Increases the surface area for absorption
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Secretes enzymes for digestion
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| 9. | In a closed circulatory system, blood is completely enclosed within ? | |
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sinuses
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skeleton
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heart
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vessels
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| 10. | Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva ? | |
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Fats breaking down into fatty acids and glycerol.
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Starch breaking down into sugars.
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Absorption of vitamins.
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Proteins breaking down into amino acids.
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