Body Fluids and Circulation
- Systemic heart refers to
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Higher vertebrates exhibit double circulation of blood namely systemic and pulmonary circulation. Systemic circulation involves the distribution of oxygenated blood via the aorta from the heart to all parts of the body, and the collection of deoxygenated blood from all parts of the body through the great veins into the heart. Pulmonary circulation denotes the route impure blood takes from the heart to the lungs for purification and then back to the heart, the left auricle receives oxygenated blood and passes it to the left ventricle. The left ventricle pumps the pure blood to all parts of the body through aorta. Hence these two chambers involved in systemic circulation are referred to as systemic heart.
Correct Option: C
Higher vertebrates exhibit double circulation of blood namely systemic and pulmonary circulation. Systemic circulation involves the distribution of oxygenated blood via the aorta from the heart to all parts of the body, and the collection of deoxygenated blood from all parts of the body through the great veins into the heart. Pulmonary circulation denotes the route impure blood takes from the heart to the lungs for purification and then back to the heart, the left auricle receives oxygenated blood and passes it to the left ventricle. The left ventricle pumps the pure blood to all parts of the body through aorta. Hence these two chambers involved in systemic circulation are referred to as systemic heart.
- The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of
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SA node is the natural pacemaker located in the right atrium. SA node initiates the cardiac impulse. So, artificial pacemaker will be grafted at the site of SA node.
Correct Option: C
SA node is the natural pacemaker located in the right atrium. SA node initiates the cardiac impulse. So, artificial pacemaker will be grafted at the site of SA node.
- Which of the following substances, if introduced into the blood stream, would cause coagulation of blood at the site of its introduction?
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Fibrinogen, prothrombin, thromboplastin are respectively clotting factors I, II and III.
Thromboplastin is released from injured platelets or injured tissue. This converts prothrombin into thrombin in the presence of calcium ions. The thrombin converts fibrinogen into fibrin and the latter froms the clot.Correct Option: C
Fibrinogen, prothrombin, thromboplastin are respectively clotting factors I, II and III.
Thromboplastin is released from injured platelets or injured tissue. This converts prothrombin into thrombin in the presence of calcium ions. The thrombin converts fibrinogen into fibrin and the latter froms the clot.
- Which one of the following mammalian cells is not capable of metabolising glucose to carbon-dioxide aerobically?
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Since RBCS do not have mitochondria so they can respire only anaerobically.
Correct Option: C
Since RBCS do not have mitochondria so they can respire only anaerobically.
- In humans, blood passes from the post caval to the diastolic right atrium of heart due to.
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In human, blood passes from the post caval to the diastolic right atrium of heart due to suction pull.
Correct Option: B
In human, blood passes from the post caval to the diastolic right atrium of heart due to suction pull.
