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Which of the following statements (s) regarding the cardiac system is/are correct ?
(i) Human heart is an ectodermal derivative
(ii) Mitral valve guards the opening between the right atrium and left ventricle
(iii) SAN is located on the left upper corner of the right atrium
(iv) Stroke volume Heart rate = Cardiac output.
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Answer: DSolution: During a cardiac cycle, each ventricle pumps out approximately 70 mL of blood which is called stroke volume. The stroke volume multiplied by the number of heart beats per minute (heart rate) gives the cardiac output. Therefore, Cardiac output = Stroke heart rate mL per minute i.e., 5 litres per minute.
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Question 1
In a cardiac output of 5250 mL per minute, with 75 heartbeats per minute, the stroke volume isQuestion 3
Read the following statements carefully (i) In fishes, the heart pumps out deoxygenated blood which is oxygenated by the gills and supplied to the body part from where deoxygenated blood is returned to the heart
(ii) The openings of the right and the left ventricles into pulmonary artery and aorta respectively are provided with the mitral valves
(iii) The nodal musculature has the ability to generate action potential without any external stimuli, i,e., it is autoexcitable
(iv) The T-wave of ECG represent depolarisation of the ventricles.
Which of the above two statements are incorrect ?
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| Question Text | Which of the following statements (s) regarding the cardiac system is/are correct ? (i) Human heart is an ectodermal derivative (ii) Mitral valve guards the opening between the right atrium and left ventricle (iii) SAN is located on the left upper corner of the right atrium (iv) Stroke volume Heart rate = Cardiac output. |
| Answer Type | Text solution:1 |
| Upvotes | 150 |
