Q. No.Inter-atrial septum in the human heart is:
| 1. a thin muscular wall | 2. a thick muscular wall |
| 3. a thin membranous wall | 4. a thick membranous wall |
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All vertebrates posses a:
| 1. muscular chambered heart | 2. renal portal system |
| 3. nucleated RBC | 4. double circulation |
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Match each item in Column I with one in Column II and select the correct answer from the codes given:
| COLUMN I | COLUMN II | ||
| A. | Mitral valve | a. | Allows blood flow from left atrium to left ventricle |
| B. | Papillary muscles | b. | Does not allow back opening of AV valves during ventricular systole |
| C. | AV node | c. | Ensure all chambers do not contract simultaneously |
| D. | Fibrous band between atrial and ventricular muscle mass | d. | Ensures atria contract before ventricles |
Codes
| A | B | C | D | |
| 1. | a | b | c | d |
| 2. | b | a | c | d |
| 3. | b | a | d | c |
| 4. | a | b | d | c |
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What separates the atria from the ventricles so that the atrial impulse does not spill onto the ventricles?
| 1. fibrous skeleton | 2. AV bundle |
| 3. visceral pericardium | 4. Purkinje fibers |
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Purkinje fibers are:
1. Intrinsic neural fibers in the ventricles
2. Muscle fibers that interconnect SA node and AV node
3. Muscle fibers that are distributed in the ventricular musculature
4. Neural fibers that spread the impulse throughout the ventricular muscle mass
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Statement I: A carries oxygenated blood and B carries deoxygenated blood.
Statement II: D and C close simultaneously during the beginning of ventricular diastole.
Statement III: E and F close simultaneously during the beginning of ventricular systole.
1. Only Statement I
2. Only Statement II and Statement III
3. None of the three statements is true
4. Statement I, Statement II and Statement III
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I: A is the normal pacemaker of the human heart and B is the pace-setter of the human heart.
II: While A is made up of muscle tissue, B is made up of neural tissue.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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The chamber with the thickest musculature in the human heart would be:
| 1. the right atrium | 2. the left atrium |
| 3. the left ventricle | 4. the right ventricle |
The location of the human heart is most accurately described as:
1. mediastinum of the lungs.
2. mediastinum of the pericardium.
3. mediastinum, which is located in the thoracic cavity.
4. thoracic cavity, which is located in the mediastinum.
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