(Single Best Answer) Question 31: All of the following factors normally increase the length of the ventricular cardiac muscle fibres except ?
A) Increased venous tone B) Increased total blood volume C) Increased negative intrathoracic pressure D) Lying-to-standing change in posture Answer (Select an option above to get the answer):
A) Is capable of generating impulses spontaneously B) Has rich sympathetic innervations C) Has poor cholinergic innervations D) Generates impulses at the highest rate Answer (Select an option above to get the answer):
A) Dissolved CO2 B) Carbonic Acid C) Carbamino-hemoglobin D) Bicarbonate Answer (Select an option above to get the answer):
(Single Best Answer) Question 37: A shift of posture from supine to upright posture is associated with cardiovascular adjustments. Which of the following is NOT true in this context ?
A) Rise in central venous pressure B) Rise in heart rate C) Decrease in cardiac output D) Decrease in stroke volume Answer (Select an option above to get the answer):
(Single Best Answer) Question 38: Although more than 400 blood groups have been identified, the ABO blood group system remains the most important in clinical medicine because ?
A) It was the first blood group system to be discovered B) It has four different blood groups A, B, AB, O(H) C) ABO(H) antigens are present in most body tissues and fluids D) ABO(H) antibodies are invariably present in plasma when persons RBC lacks the corresponding antigen Answer (Select an option above to get the answer):
(Single Best Answer) Question 39: A 55 year old male accident victim in casualty urgently needs blood. The blood bank is unable to determine his ABO group, as his red cell group and plasma group do not match. Emergency transfusion of patient should be with ?
A) RBC corresponding to his red cell group and colloids/crystalloid B) Whole blood group corresponding to his plasma group C) O positive RBC and colloids/crystalloid D) AB negative whole blood Answer (Select an option above to get the answer):