13) 70% of the carbon dioxide in your blood is transported a) Dissolved in the p
ID: 3519201 • Letter: 1
Question
13) 70% of the carbon dioxide in your blood is transported a) Dissolved in the plasma b) Bound to globins c) Bound to heme groups d) As carbonic acid or bicarbonate in the plasma e) Bound to iron 14) Which of these does not serve a role in chemical digestion in humans? a) Oral cavity b) Stomach c) Pharynx d) Colon e) Duodenum 15) Which of these permits mastication in mammals and is not found in most other species? a) Secondary palate b) cheeks c) teeth d) tongue e) lips 16) Which of these is associated with puncturing, tearing, and ripping food in mammals? a) molars b) canines c) incisors d) premolars e) wisdom teeth 17) Salivary glands are associated with digestion of a) Nucleic acids b) lipids c) proteins d) carbohydrates e) vitamins 8) Which of these covers the glottis during swallowing? a) epiglottis b) uvula c) soft palate d) hyoid e) all of these cover the glottis during swallowingExplanation / Answer
13. Most of the carbon dioxide dissolved in blood is transported through the plasma in the form of bicarbonate ions( 70%).
Hence option (d) is correct.
14. In oral cavity and pharynx chemical digestion of food takes place with the help of saliva secreted by salivary glands which contain salivary amylase enzyme.
Stomach also plays important role in chemical digestion of food. Duodenum is a part of small intestine and the main chemical digestion takes place here.
Colon is a part of large intestine, where no digestion tajta place. Here only reabsorption of water takes place.
Hence option (d) is correct.
16. Cannines are the teeth which help in the puncturing, tearing and ripping of food and are longer in size. Premolars and molars help in chewing of food, whereas incisors help in biting of food.
Hence option (b) is correct.
17. Salivary glands are present in buccal cavity and secrete enzyme salivary amylase which helps in breakdown of large carbohydrates like starch into smaller molecules like maltose.
Hence option (d) is correct.
18. A flap like structure is present in the throat which prevents food from entering windpipe and lungs. This flap is called epiglottis.
Hence option (a) is correct.
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