The life span of the erythrocytes in humans is about

1.  120 days

2.  150 days

3.  190 days

4.  180 days

_________ is known as the graveyard of RBCs.

1.  Liver

2.  Spleen

3.  Pancreas

4.  Bone marrow 

Haemoglobin is

1. an oxygen carrier in human blood

2. a protein used as food supplement

3. an oxygen scavenger in root nodules

4. a plant protein with high lysine content

The transport of respiratory gases is taken care by which blood component?

1. RBC

2. WBC

3. Platelets

4. Fibrinogen

Oxygen carrier in human blood is 

1.  Carbonic anhydrase

2.  Haemoglobin

3.  Haemocyanin

4.  Both (1) & (3) 

The number of RBC in a healthy individual are:

1. 5 million to 5.5 million RBCs

2. 5 billion to 5.5 billion RBCs

3. 1 million to 1.5 million RBCs

4. 1 billion to 1.5 billion RBCs

Serum differs from blood in 

1. lacking globulins

2. lacking albumins

3. lacking clotting factors

4. lacking antibodies

B and T forms, responsible for the immune response are the type of:

1. Thrombocytes

2. Lymphocytes

3. Eosinophils

4. Granulocytes

Hemoglobin in healthy individual:

1.12–20 g/10 mL of blood

2. 12–14 g/100 mL of blood

3. 12–30 g/10 mL of blood

4. 12–14 g/10 mL of blood

How much percentage of water present in plasma?

1. 6-8%

2. 90-92%

3. 8-10%

4. 55%