Question

In humans, blood passes from the post caval to the diastolic right atrium of heart due to.

A. pushing open of the venous valves
B. suction pull  
C. stimulation of the sino auricular node
D. pressure difference between the post caval and atrium
Answer :   suction pull

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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