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Q. No.One of the main advantages of a closed over an open circulatory system is:
1.
The use of a heart to create pressure gradients necessary for blood flow
2.
The ability to direct the flow of blood to certain tissues
3.
The ability of respiratory pigment to transport O2
4.
The ability to return blood to the heart
Subtopic: Human Heart: Double Circulation |
Level 3: 35%-60%
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If there is a blockage between the AV node and AV bundle, how will this affect the appearance of the ECG?
1. PR interval would be smaller
2. QRS interval would be longer
3. There would be more P-waves than QRS complexes
4. There would be more QRS complexes than P-waves
1. PR interval would be smaller
2. QRS interval would be longer
3. There would be more P-waves than QRS complexes
4. There would be more QRS complexes than P-waves
Subtopic: ECG & Coronary Artery Disease |
61%
Level 2: 60%+
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Characteristics features of different blood vessels in the body are shown. A, B and C represent:
| 1. | A = Total area, B = Velocity, C = Blood pressure |
| 2. | A = Blood pressure, B = Velocity, C = Total area |
| 3. | A = Velocity, B = Total area, C = Blood pressure |
| 4. | A = Total area, B = Blood pressure, C = Velocity |
Subtopic: Blood: General Description & RBC: Part 1 | Blood: General Description & RBC: Part 2 | Blood: General Description & RBC |
61%
Level 2: 60%+
Hints
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 |
Subtopic: Regulation of Cardiac Activity |
52%
Level 3: 35%-60%
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If a molecule of CO2 released into the blood of a human foetus is exhaled through the mouth of the mother, it will not travel through the:
| 1. | Right atrium of mother |
| 2. | Right atrium of foetus |
| 3. | Left ventricle of mother |
| 4. | Left ventricle of foetus |
Subtopic: Human Heart: Double Circulation |
55%
Level 3: 35%-60%
Hints
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 |
Subtopic: Regulation of Cardiac Activity |
60%
Level 2: 60%+
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| Assertion (A): | RBCs contain a red-colored complex protein called hemoglobin. |
| Reason (R): | RBCs are devoid of nucleus in most of the mammals and are biconcave in shape. |
| 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: Blood: General Description & RBC |
79%
Level 2: 60%+
Hints
| Assertion (A): | 'O' group individuals are called universal donors. |
| Reason (R): | Group 'O' blood can be donated to persons with any other blood group. |
| 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: Blood: Blood Group (A,B,O) |
88%
Level 1: 80%+
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| Assertion (A): | Nearly 20% of humans have Rh antigens. |
| Reason (R): | Rh antigen is named after Rhesus monkeys. |
| 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: Blood: Blood Group |
78%
Level 2: 60%+
Hints
| Assertion(A): | Birds and Mammals have double circulation. |
| Reason (R): | Two separate circulatory pathways are present in birds and mammals where the mixing of oxygenated and deoxygenated blood occurs. |
| 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: Human Heart: Double Circulation |
83%
Level 1: 80%+
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