The component of blood which prevents its coagulation in the blood vessels is

(1) haemoglobin

(2) plasma

(3) thrombin

(4) heparin.

Thickening of arteries due to cholesterol deposition is:

(1) atherosclerosis             

(2) rheumatic heart

(3) blood pressure               

(4) cardiac arrest

You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of these will you not use for the purpose?

(1) Test tube containing calcium bicarbonate

(2) Chilled test tube

(3) Test tube containing heparin

(4) Test tube containing sodium oxalate

What is diapedesis?

(1)  A kind of amoeboid movement.

(2)  The process of filtration of urea in kidney.

(3)  A type of locomotion found in hydra.

(4)  Migration of WBCs into the tissue spaces from blood capillaries.

Which of the following diseases is also called Christmas disease?

(1) Sickle-cell anaemia

(2) Haemoglobinuria

(3) Myocardial infarction

(4) Haemophilia-B

The opening between the right atrium and the right ventricle is guarded by the valve named

(1) bicuspid valve                   

(2) tricuspid valve

(3) mitral valve                       

(4) semilunar valve

Ventricular diastole occurs due to a/an 

(1)  Organ system

(2)  Cell organelle

(3)  Tissue

(4)  Organ

What is the oxidation state of iron in haemoglobin?

(1)  Fe^-

(2)  Fe²⁺

(3)  Fe³⁺

(4)  Fe⁴⁺

Identify the given figure and select the correct option 

(1) Neutrophil - phagocytic cell which destroy foreign organisms entering the body

(2) Eosinophil - their number increases during allergic infection

(3) Lymphocyte - small sized non-motile and non-phagocytic

(4) Monocyte - motile and phagocytic in nature

Which one of the following vitamins is anti-haemorrhagic?

(1) Vitamin B₁₂               

(2) Vitamin B₅

(3) Vitamin C                   

(4) Vitamin K