Q. No.Normal activities of the heart are regulated:
1. intrinsically
2. by adrenal medullary hormones
3. by sympathetic nervous system
4. by parasympathetic nervous system
1. intrinsically
2. by adrenal medullary hormones
3. by sympathetic nervous system
4. by parasympathetic nervous system
Exchange of nutrients and gases between the blood and the cells always occurs:
1. by active transport
2. with the help of transport carrier proteins
3. at the arterial end of the capillary network
4. through the interstitial fluid
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 |
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 |
The SA node is called as the normal pacemaker of the human heart because:
| 1. | it is the only muscle in the nodal tissue and human heart is myogenic |
| 2. | it is the remnant of the sinus venosus |
| 3. | it is located in the right atrium, and atria must contract before ventricles |
| 4. | it generates impulse at maximum rate in the nodal tissue |
The second most common formed elements in the human blood are:
| 1. | Proteins | 2. | Water |
| 3. | RBC | 4. | Thrombocytes |
The functions of spleen include all of the following except:
1. Mechanical filtration of red blood cells.
2. Production of all types of blood cells during fetal life
3. Storage of red blood cells, lymphocytes and other formed elements.
4. Suppression of cell mediated and humoral immune responses
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 |
RBCs are the most common cells in human body and have a shape of a biconcave disc that:
| 1. | decreases the distance between the cell membrane and hemoglobin molecules, facilitating oxygen uptake |
| 2. | allows the cells to hold more hemoglobin for a given volume |
| 3. | allows them to squeeze through the tight spaces in the spleen |
| 4. | keeps them from leaking out through the walls of capillaries |
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 |
© 2025 GoodEd Technologies Pvt. Ltd.