Platelets

Q.

Given below is a diagram of a smear of human blood. Study the same and answer the question that follows:

(a) Name the parts 1, 2, 3 and 4 indicated by guidelines.
(b) Mention two structural differences between the parts labelled '1' and 2
(c) What is the main function of the parts labelled 1. 2 and 3 respectively?
(d) What is the lifespan of the part labelled '1'?
(e) Name a soluble protein found in 4 which helps in the clotting of blood.

Q.

What are the different blood cells? Write the functions of each. [5 MARKS]

Q.

Pro-thrombin is converted into thrombin by___.

Q. Which of the following is not a component of blood?

1. RBCs
2. Platelets
3. Plasma
4. Arteries

Q.

What are the 3 stages of blood clotting?

Q.

Which of the following is not a hereditary disease?

1. Thalassaemia

2. Cystic fibrosis

3. Cretinism

4. Haemophilia

Q.

Thromboplastin required for blood clotting at the site of injury is released by______

1. Monocytes

2. Thrombocytes

3. Basophils

4. Neutrophils

Q.

Fluid part of blood after removal of corpuscles is

1. Plasma

2. lymph

3. Serum

4. Vaccine

Q.

Question 68
What will happen if platelets were absent in the blood?

Q. Question 5
What will happen if there are no platelets in the blood?

Q. Platelets are fragments that bud off from a larger cell called .

1. prokaryocyte
2. megakaryocyte
3. microkaryocyte

Q.

Which is the final component that enters the blood coagulation cascade?

1. Fibrin

2. Thrombin

3. Fibrinogen

4. Prothrombin

Q.

Explain the role of platelets in blood. [3 MARKS]

Q. Which of the following releases thromboplastin during blood coagulation?

1. Lymphocytes
2. Damaged platelets
3. Erythrocytes
4. WBC

Q.

Which of the following substances if introduced into bloodstream, would cause coagulation at the site of introduction?

1. Fibrinogen

2. Prothrombin

3. Heparin

4. Thromboplastin

Q.

What is the first stage of blood clotting?

Q.

What is the role of platelets in blood?

Q.

Platelets are oval structures that bud off from giant cells called ____________

1. microkaryocytes

2. megakaryocytes

3. lymphycytes

4. leukocytes

Q.

In which component of blood are heparin, thromboplastin, thrombin are present?

Q. Raj got injured while playing football. It was bleeding heavily but the bleeding stopped after a while. Which among the following is responsible for that?

1. RBC
2. Platelets
   
3. WBC
4. Plasma

Q.

Which of the following conditions which in humans due to dengue fever.

1. Thrombocytosis

2. Erythrocytopenia

3. Thrombocytopenia

4. Leukopenia

Q. A ___ is a component that is essential for clotting of blood.

1. WBC
2. RBC
3. platelet
4. leucocyte

Q.

Having more than the normal count of platelets in one microliter of blood is known as ___

1. Thrombocytopenia

2. Erythrocytopenia

3. Thrombocytosis

4. Leukopenia

Q.

What is the other term used for blood platelets?

1. Thrombin

2. Fibrin

3. Thrombocytes

4. Basophils

Q. Platelets are also called _____.

1. megakaryocytes
2. thrombocytes
3. erythrocytes
4. leucocytes

Q.

The lack of enzyme adenosine deaminase is responsible for the disease_________

1. Cystic fibrosis (CF)

2. Severe combined immunodeficiency (SCID)

3. Colour blindness

4. Haemophilia

Q. Differentiate between lymph and blood ?

Q.

What is the correct order in which the factors of clotting are affected in order for blood to clot?

1. Fibrin, Fibrinogen, Thrombin, Prothrombin, Thromboplastin

2. Prothrombin, Thromboplastin, Thrombin, Fibrin, Fibrinogen

3. Thromboplastin, Thrombin, Prothrombin, Fibrin, Fibrinogen

4. Thromboplastin, Prothrombin, Thrombin, Fibrinogen, Fibrin

Q.

Which of the following components of blood is the least in quantity and amount?

1. RBCs

2. Plasma

3. WBCs

4. Platelets

Q. My question is related to transportation topic under chapter 1 life processes and the question is if human need blood for transportation of oxygen for oxidation in cells where do this blood comes from is it in fixed amount since birth or generated and if generated then how