Question

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

A. Atrioventricular bundle
B. Purkinje system
C. Sinuatrial node  
D. Atrioventricular node
Answer :   Sinuatrial node

Releted MCQ Question on
Zoology >> Body Fluids and Circulation

Releted Question 1

Adult human RBCs are enucleated. Which of the following statement(s) is/are most appropriate explanation for this feature?
(1) They do not need to reproduce
(2) They are somatic cells
(3) They do not metabolize
(4) All their internal space is available for oxygen transport

A. only (1)
B. (1), (3) and (4)
C. (2) and (3)
D. only (4)
Releted Question 2

Reduction in pH of blood will

A. reduce the rate of heart beat
B. reduce the blood supply to the brain
C. decrease the affinity of haemoglobin with oxygen
D. release bicarbonate ions by the liver
Releted Question 3

Which one of the following is correct ?

A. Serum = Blood + Fibrinogen
B. Lymph = Plasma + RBC + WBC
C. Blood = Plasma + RBC + WBC
D. Plasma = Blood - Lymphocytes
Releted Question 4

Erythropoiesis starts in :

A. Liver
B. Spleen
C. Red bone marrow
D. Kidney

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Body Fluids and Circulation


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