Q. No.The human heart is derived from embryonic:
1.
Ectoderm
2.
Mesoderm
3.
Endoderm
4.
All three germ layers
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| 1. | ventricular filling. |
| 2. | the atrioventricular valves to close, and then the semilunar valves to open. |
| 3. | the semilunar valves to close, and then the atrioventricular valves to open. |
| 4. | pressure to become greater in the aorta and pulmonary trunk than in the ventricles. |
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| 1. | Annelids and arthropods | 2. | Annelids and chordates |
| 3. | Chordates and arthropods | 4. | Mollusks and arthropods |
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The functions of the lymphatic system do not include:
| 1. | The removal of interstitial fluid from tissues |
| 2. | Transport of factors needed for coagulation of blood |
| 3. | transport of nutrients and hormones |
| 4. | Absorption and transport of end products of fat digestion |
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The second most common formed elements in the human blood are:
| 1. | Proteins | 2. | Water |
| 3. | RBC | 4. | Thrombocytes |
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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. | Closure of AV valves | a. | Second heart sound |
| B. | Closure of semilunar valves | b. | First heart sound |
| C. | Opening of AV valves | c. | Ventricular ejection |
| D. | Opening of semilunar valves | d. | Passive ventricular filling |
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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The nodal musculature of the heart has the capability to generate impulse:
| 1. | on stimulation by the sympathetic division of the autonomic nervous system |
| 2. | on stimulation by the parasympathetic division of the autonomic nervous system |
| 3. | on stimulation by the somatic neural division of the peripheral nervous system |
| 4. | without any external stimulus |
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Formed elements and clotting factors are removed from the blood. The remaining fluid will be called as:
| 1. | Plasma | 2. | Lymph |
| 3. | Serum | 4. | Antiserum |
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The autonomic regulation of cardiac activity is carried out by a neural center located in:
| 1. | Medulla oblongata | 2. | Hypothalamus |
| 3. | Cerebrum | 4. | Thalamus |
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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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