Arrange the following events in a proper sequence.

(i) Increased ventricular pressure

(ii) Attempted backflow of blood into the atria

(iii) Ventricular systole

(iv) Closure of AV valves

(1) (i) – (ii) – (iii) – (iv)

(2) (ii) – (i) – (iii) – (iv)

(3) (iii) – (i) – (ii) – (iv)

(4) (i) – (iii) – (ii) – (iv)

Imagine, if the semilunar valves do not work, which of the following event won’t happen surely?

(1) Atrial Contraction

(2) Ventricular Contraction

(3) flow of blood

(4) Heart sound production

SAN is responsible for

(1) initiating and maintaining a random contractile ability of heart

(2) initiating and maintaining a rhythmic contractile ability of heart

(3) maintaining a random contractile ability of heart

(4) Initiating a rhythmic contractile ability of heart

Semilunar valves are found between

1. left ventricle and aorta

2. right ventricle and pulmonary artery

3. left ventricle and pulmonary vein

4. both (1) and (2)

Bicuspid valves are present between

(1) left atria and aorta

(2) right atria and pulmonary artery

(3) left atria and left ventricle

(4) right atria and right ventricle

Match the following:

1. p–g; q–h; r–e; s–f

2. p–f; q–e; r–h; s–g

3. p–e; q–h; r–f; s–g

4. p–f; q–g; r–h; s–e

Platelets are formed from–

(1) Megakaryoblast

(2) Megakaryocyte

(3) Macrokaryoblast

(4) Macrophages

______ population has Rh ______ on the surface of ______ present in their ______.

(1) 20%, antigen, platelets, plasma

(2) 80%, antigen, RBC, blood

(3) 80%, antibody, platelet, plasma

(4) 20%, antibody, RBC, blood

ABO blood grouping is based on

(1) presence of two soluble antibodies

(2) absence of two surface antigens

(3) presence of two surface antigens

(4) both (2) and (3)

If a person gets his blood count done from a lab and finds his platelets to be 20000 and then meets an accident on that day. Which of the following is correct?

(1) as the platelet count is normal, there will be no harm to him because of platelets.

(2) Clotting disorders

(3) Severe Blood loss from body

(4) both (2) and (3)