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Q. No.Read the given statements and select the correct option.
Statement-A : Though the human heart is autoexcitable, its functions can be moderated by both neural and hormonal mechanisms.
Statement-B : Lymph is almost similar to blood except for the protein content and the formed elements.
1. Both statements A and B are correct
2. Both statements A and B are incorrect
3. Only statement A is incorrect
4. Only statement B is incorrect
Statement-A : Though the human heart is autoexcitable, its functions can be moderated by both neural and hormonal mechanisms.
Statement-B : Lymph is almost similar to blood except for the protein content and the formed elements.
1. Both statements A and B are correct
2. Both statements A and B are incorrect
3. Only statement A is incorrect
4. Only statement B is incorrect
Subtopic: Â Lymph |Â Regulation of Cardiac Activity |
 78%
From NCERT
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Blood pressure in the pulmonary artery is
a. More than that in the vena cava
b. Same as that in the aorta
c. More than that in the pulmonary vein
Select the option with correct statements(s)
1. a and b
2. b and c
3. Only c
4. a and c
a. More than that in the vena cava
b. Same as that in the aorta
c. More than that in the pulmonary vein
Select the option with correct statements(s)
1. a and b
2. b and c
3. Only c
4. a and c
Subtopic: Â Blood: General Description & RBC: Part 1 |Â Regulation of Cardiac Activity |
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Assertion (A): Human heart is myogenic.
Reason (R): Normal activities of the heart are regulated by the human brain.
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. (A) is false, but (R) is true.
Reason (R): Normal activities of the heart are regulated by the human brain.
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. (A) is false, but (R) is true.
Subtopic: Â Regulation of Cardiac Activity |
 70%
From NCERT
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Assertion (A): The neural signals through the sympathetic nerves increase the heart-beat, thereby decreasing the cardiac output.
Reason (R): Adrenalin secretion drastically decrease cardiac output.
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.
Reason (R): Adrenalin secretion drastically decrease cardiac output.
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.
Subtopic: Â Regulation of Cardiac Activity |
 84%
From NCERT
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The mammalian heart beat:
1. Stops when the nerve supply to the heart is cut
2. Originates at AV-node
3. Decreases when stretch receptors in the vena cava are stimulated
4. Slows down when the activity in the vagus nerve increases
1. Stops when the nerve supply to the heart is cut
2. Originates at AV-node
3. Decreases when stretch receptors in the vena cava are stimulated
4. Slows down when the activity in the vagus nerve increases
Subtopic: Â Regulation of Cardiac Activity |
 53%
From NCERT
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If it was possible to genetically engineer humans to be able to run long distances faster at high altitudes, which of the following would not help?
1. Increasing the thickness of cellular lining of the alveoli
2. Decreasing the average size of the alveoli
3. Increasing the amount of Hb in each RBC
4. More than one options as mentioned above
1. Increasing the thickness of cellular lining of the alveoli
2. Decreasing the average size of the alveoli
3. Increasing the amount of Hb in each RBC
4. More than one options as mentioned above
Subtopic: Â Regulation of Cardiac Activity |
 59%
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