Assertion (A): The sight, smell, and /or the presence of food in the oral cavity can stimulate saliva secretion.
Reason (R): Gastric and intestinal secretions are stimulated by neural signals.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
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Subtopic: Digestive Secretions: Saliva |
57%
From NCERT
Other Reason
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Assertion (A): Majority of the mammals possess diphyodont teeth.
Reason (R): Humans have heterodont dentition.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
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Subtopic: Alimentary Canal: Oral Cavity & Teeth |
84%
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Assertion (A): Enamel is the hardest substance of the human body.
Reason (R): Enamel is mainly formed of calcium carbonate.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
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Subtopic: Introduction to Digestive System | Alimentary Canal: Oral Cavity & Teeth |
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1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
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Subtopic: Movement of Food in Gut |
69%
From NCERT
Other Reason
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Assertion (A): Substances like fructose and some amino acids are absorbed with the help of carrier ions like Na+.
Reason (R): This mechanism is called facilitated transport.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
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Subtopic: Absorption: Part 1 | Absorption: Part 2 |
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Assertion (A): The oxyntic cells secrete intrinsic factor.
Reason (R): Intrinsic factor is essential for vitamin B12 absorption.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
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Subtopic: Gastric Secretions |
50%
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Assertion (A): About 30% of the starch is hydrolyzed by ptyalin at a pH of 7.5.
Reason (R): The stomach stores food for 10-12 hours.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Assertion (A): Various types of movements are generated by the muscularis layer of the small intestine.
Reason (R): These movements help in through mixing up of the food with various secretions to facilitate digestion.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
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Subtopic: Peristalsis: Gland in Alimentary Canal | Intestinal Secretions |
77%
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Find out the correct statement:
1. An adult human liver weighs 1.2 - 1.5 kg
2. Hepatic lobules are the structural and functional units of liver containing hepatic cells arranged in the form of cords
3. Each hepatic lobule is covered by a thin connective tissue called Glisson's capsule
4. More than one option is correct
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Subtopic: Peristalsis: Gland in Alimentary Canal |
82%
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Read the following statements:
i. The muscular activities of different parts of the alimentary can be moderated by neural mechanisms, both local and through CNS
ii. Hormonal control of the secretion of digestive juices is carried out by the local hormones produced by the gastric and intestinal mucosa
iii. Large intestine secretes mucus that helps in adhering the undigested particles and lubricating it for easy passage
iv. Backflow of faeces into small intestine is prevented by ileo-caecal value
v. Succus entericus lack nucleosidase
How many of the above statements are correct?
1. Four
2. Two
3. Three
4. One