Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature?

(I)    They do not need to reproduce.

(II)   They are somatic cells.

(III)  They do not metabolise.

(IV)   Their internal space is available for oxygen transport.

 

CODES

(1)  Only (IV)

(2)  Only (I)

(3)  (I), (III) and (IV)

(4)  (II) and (III)

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

(1) Erythrocytes                       

(2) Leucocytes

(3) Neutrophils                         

(4) Thrombocytes

Serum differs from blood in 

(1) lacking globulins

(2) lacking albumins

(3) lacking clotting factors

(4) lacking antibodies

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

(1) Dorsal Aorta             

(2) Hepatic Vein

(3) Hepatic Portal vein     

(4) Renal vein

Blood pressure in the pulmonary artery is

(1) more than that in the carotid

(2) more than that in the pulmonary vein

(3) less than that in the venae cavae

(4) same as that in the aorta

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

1. Frog

2. Lizard

3. Whale

4. Shark

Doctors use a stethoscope to hear the sounds produced during each cardiac cycle. The

second sound is heard when

1. AV valves open up

2. Ventricular walls vibrate due to gushing in of blood from atria

3. Semilunar valves close down after the blood flows into vessels from ventricles

4. AV node receives the signal from SA node

Erythropoiesis starts in:-

1. kidney

2. liver

3. spleen

4. red bone marrow

Blood pressure in the mammalian aorta is maximum during

1. systole of the left atrium

2. diastole of the right ventricle

3. systole ot the left ventricle

4. diastole of the right atrium

Which one of the following is correct?

1. Plasma = Blood - Lymphocytes

2. Serum = Blood + Fibrinogen

3. Lymph = Plasma + RBC + WBC

4. Blood = Plasma + RBC + WBC + Platelets