Q. No.Human Heart has SA node which makes it–
(1) myogenic heart
(2) neurogenic heart
(3) Digenic Heart
(4) Rhinogenic Heart
Bicuspid valves are present between
(1) left atria and aorta
(2) right atria and pulmonary artery
(3) left atria and left ventricle
(4) right atria and right ventricle
A patch of nodal tissue responsible for initiating the rhythmic contractile activity of the heart is present in:
1. Lower left corner of the left ventricle
2. Upper right corner of the right atrium
3. Lower left corner of the right ventricle
4. Upper left corner of the left atrium
The opening between the right atrium and the right ventricle is guarded by the valve named
(1) bicuspid valve
(2) tricuspid valve
(3) mitral valve
(4) semilunar valve
Match the following nodal tissues of heart with their correct location
| Column I | Column II | ||
| (a) | AV node | (i) | Right upper corner of the right atrium |
| (b) | SA node | (ii) | Left upper corner of the right atrium |
| (c) | Bundle branch | (iii) | Base of inter atrial septum tilled towards right |
| (d) | Purkinje fibres | (iv) | Lower right corner of the right atrium |
| (v) | Interventrivular septum | ||
| (vi) | Musculature of ventricles | ||
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (ii) | (vi) | (v) |
| 2. | (iii) | (i) | (v) | (vi) |
| 3. | (i) | (iii) | (v) | (vi) |
| 4. | (v) | (iv) | (vi) | (iii) |
SAN is present in __________ while AVN is present in __________.
(1) Right upper corner and left lower corner of both the atria.
(2) Right upper corner and left lower corner of right atrium.
(3) Right upper corner and left lower corner of left atrium.
(4) Right upper corner and left median corner of left atrium
Semilunar valves are found between
1. left ventricle and aorta
2. right ventricle and pulmonary artery
3. left ventricle and pulmonary vein
4. both (1) and (2)
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
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. |
Which of the following statements is not true for the human heart?
1. Adrenal medullary hormones can increase the cardiac output
2. Neural signal through the sympathetic nerves can initiate the heart beat
3. Increase in BMR due to thyroxine can indirectly increase heart rate
4. Strength of ventricular contraction and cardiac output is increased by catecholamines
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