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 metabolise

4) All their internal space is available for oxygen transport.

• Only 1

• 1, 3 & 4

• 2 & 3

• only 4

The hepatic portal vein drains blood to liver from?

• Stomach

• kidneys

• Brain

• Heart

Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body.

• Erythrocyte

• Leucocyte

• Neutrophils

• Thrombocytes

Serum differs from blood in

• Lacking globulins

• Lacking albumins

• Lacking clotting factors

• Lacking antibodies

In mammals, which blood vessel would normally carry the largest amount of urea?

• Hepatic vein

• Hepatic portal vein

• Renal vein

• Dorsal aorta

Which one of the following animals has two seperate circulatory pathways

• Whale

• Shark

• Frog

• Lizard

Doctors use stethoscopes to hear the sound produced during each cardiac cycle. The second sound is heard when

• AV nodes receives signal from SA node

• All valves open up

• Ventricular walls vibrate due to gushing in of blood from atria

• Semilunar valves close down after blood flows into vessels from ventricles

Erythropoiesis starts in

• Spleen

• Red bone marrow

• Kidney

• Liver

Which one of the following is correct?

• Lymph = Plasma + RBC + WBC

• Blood = Plasma + RBC + WBC + Platelets

• Plasma = Blood - Lymphocytes

• Serum = Blood + Fibrinogen

Blood pressure in mammalian Aorta is maximum during.

• Systole of the left ventricle

• Diastole of the right atrium

• Systole of the left atrium

• Diastole of the right ventricle