The thick muscular projections on the walls of the ventricle are called

1. Chordae tendineae

2. Columnae carneae

3. Conus arteriosus

4. Truncus arteriosus

Subtopic:  Human Heart: Gross Anatomy |
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NEET 2023 - Target Batch - Aryan Raj Singh
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When type B agglutinogen is not present on the surface of RBC of a person, his plasma would contain ____ agglutinins.

1. Anti-a                          2. Anti-b

3. Both anti-a and anti-b   4. None

Subtopic:  Blood: Blood Group (A,B,O) |
 54%
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NEET 2023 - Target Batch - Aryan Raj Singh
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Oxalates and citrates are used as anticoagulants in stored blood because they:

1. Chelate calcium ions

2. Act as competitive inhibitors of vitamin K

3. Potentiate anti-thrombin III

4. Activate heparin

Subtopic:  Blood: Blood Clotting |
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NEET 2023 - Target Batch - Aryan Raj Singh
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With respect to blood, the composition of lymph can be expressed as:

1. No RBc, No Plateletes, Less proteins, Less calcium and phosphorus, Predominant corpuscles lymphocytes.

2. No RBc, No Plateletes, Less proteins, More calcium and phosphorus, Predominant corpuscles lymphocytes.

3. No RBc, Less or no Plateletes, Less proteins, Less calcium and phosphorus, Predominant corpuscles macrophages.

4. No RBc, less Plateletes, Less proteins, Less calcium and phosphorus, Predominant corpuscles monocytes.

Subtopic:  Lymph |
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Histamine in the blood is secreted by:

1. Mast cells 2. Macrophages
3. Eosinophils 4. Basophils
Subtopic:  Blood: White Blood Cells |
 64%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

A person with AB blood group:

1. Has A and B antigens in his plasma

2. Lacks any antibodies on RBC surface

3. Can receive blood transfusion from a person of his own group.

4. Can donate blood to all other group recipients

Subtopic:  Blood: Blood Group (A,B,O) |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

The inter-atrial septum in the human heart can be best described as:

1. A thin muscular wall

2. A thick muscular wall

3. A thin fibrous tissue

4. A thick fibrous tissue

Subtopic:  Human Heart: Gross Anatomy |
 69%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

The sino-atrial node is the normal pacemaker of the human heart because:

1. It is located in the right atrium.
2. It is the only part of the conducting system that can generate impulse.
3. It can generate the maximum number of action potentials in the conducting system.
4. It produces action potentials that are more in size than the other parts of the conducting system.
Subtopic:  Human Heart: Gross Anatomy |
 70%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

What percentage of ventricular filling is achieved by atrial contraction?

1. 30

2. 50

3. 70

4. 90

Subtopic:  Human Heart: Double Circulation |
 73%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

In a surface ECG the QRS complex represents:

1. Atrial depolarization

2. Atrial repolarization

3. Ventricular depolarization

4. Ventricular repolarization

Subtopic:  ECG & Coronary Artery Disease |
 87%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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