Multiple Choice QuestionsWhich of the following gastric secretions is correctly matched with its source?
Pepsin - Chief cells
Chymotrypsin - Parietal cells
HCl - Goblet cells
Mucus - Oxyntic cells
Assertion: HCl converts pepsinogen into active enzyme pepsin.
Reason: Pepsin converts protein into proteoses and peptones.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: Emulsification is necessary for the digestion of fats.
Reason: After fats are emulsified, the action of enzyme amylase gets significantly increased.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
A.
If both assertion and reason are true and reason is the correct explanation of assertion.
Being insoluble in water, fats and oils form large immiscible droplets in aqueous media but the enzymes which hydrolyse fats and oils (called lipases) are insoluble in fats and soluble in water. Therefore, lipases can act only on the water adjoining surfaces of fat droplets. Evidently, the larger the surface area of fat droplets, the greater is the action of the lipase on them. We know that the smaller the size of a droplet, the larger is its surface area relative to its mass. Thus lipases can digest fat in significant amounts only when large fat droplets are broken into tiny droplets to form a fine emulsion. This is the reason why emulsification is so necessary for the digestion of fats. Enzyme amylase, on the other hand, is a starch - hydrolysing enzyme which has no role in fat digestion.
Assertion: In jaundice, the skin and mucous membranes assume a yellowish hue
Reason: Yellow pigment bilirubin imparts pale yellow colour to blood plasma
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: No taste sensation is evoked when drop of distilled water is put on human tongue.
Reason: Man does not possess taste buds for tasting water.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion: Oxytocin is also known as Antidiuretic hormone (ADH).
Reason: Oxytocin can cause an increase in the renal reabsorption of water.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false
Assertion : Small intestine is the principal organ for absorption of nutrients.
Reason : Absorption of water, simple sugars and alcohol etc. takes place in small intestine.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are hue but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Duodenum is the main organ of small intestine.
Reason : In duodenum, digestion and absorption mainly occurs.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are hue but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Bile is essential for the digestion of lipids.
Reason : Bile juice contains enzymes bilirubin and biliverdin.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of the assertion
If assertion is true but reason is false
If both assertion and reason are false.
Duodenum has characteristic Brunner's gland which secretes two hormones called
prolactin, parathormone
secretin, cholecystokinin
enterocrinin, duocrinin
gastrin, enterogastrone
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