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Which one of the following animals has two separate circulatory pathways?

(A)

Shark

(B)

Frog 

(C)

Lizard

(D)

Whale

NEET - Medical UG-2015 Hard

Answer & Solution:

The correct answer is (d) whale.

Whale is a mammal. Mammals show a type of circulation known as 'Double circulation'. Two separate circulatory pathways are found — systemic circulation (blood passes through the body) and pulmonary circulation(blood passes through lungs). This is possible by the presence of a complete 4 chambered heart with separate left and right side compartments. Oxygenated and deoxygenated bloods received by the left and right atria respectively pass on to the left and right ventricles. Thus, there is no mixing of oxygenated and deoxygenated bloods.

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Other Questions of the same topic

Q1:

Which one of the following is correct?

(A)

Blood = Plasma + RBC + WBC + Platelets

(B)

Plasma = Blood  Lymphocytes

(C)

Serum = Blood + Fibrinogen

(D)

Lymph = Plasma + RBC + WBC

NEET - Medical UG-2015 Hard

Q2:

Figure shows schematic plant of blood circulation in humans with labels A to D. Identify the label and give  its function/s.

(A)

 A-Pulmonary vein-takes impure blood from body parts, \(PO_2\) = 60 mm Hg

(B)

 B-Pulmonary artery – takes blood from heart to lungs, \(PO_2\) = 90 mm Hg

(C)

C-Vena Cava-takes blood from body parts to right auricle, \(PCO_2\)= 45 mm Hg

(D)

 D-Dorsal aorta – takes blood from heart to body parts, \(PO_2\) = 95 mm Hg

NEET - Medical UG-2013 Medium

Q3:

The diagram given here is the standard ECG of a normal person. The P-wave represents the :

(A)

Contraction of both the atria

(B)

Initiation of the ventricular contraction

(C)

Beginning of the systole

(D)

End of systole

NEET - Medical UG-2013 Medium

Chemistry Physics

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