Blood Platelets

Q.

why blood is red in colour

Q.

What happens if blood platelets are absent in the blood?

Q.

Boojho was learning to ride a bicycle. He lost his balance and fell down. However, it was observed that the bleeding stopped after some time.

1. Give the reason for the bleeding to stop?
2. Of what color would the wounded area be and why?
3. Blood clotting occurs as a result of which blood cells?

Q.

Explain the term ‘blood transfusion’.

Q.

What will happen if there is a decrease in platelet count in the blood?

1. Blood will not clot

2. Blood will clot very quickly

3. Blood will become white

4. Blood will be incapable of fighting germs

Q.

What Is Lymph? How is the composition of lymph different from blood plasma?

Q.

Name a constituent of blood that initiates the clotting process.

Q.

What are platelets? What is their function? How do they do so? [3 MARKS]

Q.

Mention the functions of RBC.

Q.

Blood plasma is

1. whitish

2. yellowish

3. greenish

4. reddish

Q.

What will happen if there are no platelets in the blood?

Q.

A drop of each of the following is placed separately on four slides. Which of them will not coagulate?

1. Blood plasma

2. Sample from the thoracic duct of lymphatic system

3. Blood serum

4. Whole blood from pulmonary vein

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

Q. A person bruised and there was excessive bleeding for long time. This indicates low:

1. haemoglobin in the blood
2. red blood cell count in the blood
3. platelet count in the blood
4. white blood cell count in the blood

Q.

Mention the function of the following.
Platelets

Q.

Which type of blood cells help in clotting of blood?

Q.

Non-nucleated cells which help in the clotting of blood

Q.

what are the functions of WBC, RBC, blood platelets?

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

Q. Can we make human blood artificially ? If yes , how ? And if no , why ?

Q.

What is the role of platelets in blood?

1. It helps in clotting of blood flow.

2. It helps to reduce the toxins in blood plasma.

3. It helps in transport of food.

4. It helps in transport of oxygen.

Q. Squeezing of leucocytes out from the endothelium of capillaries to fight foreign agents is known as

1. Haemolysis
2. Diapedesis
3. Phagocytosis
4. Rouleaux

Q.

Platelets help in blood clotting.

1. True
2. False

Q.

What are platelets? What is their function? How do they do so? [3 MARKS]

Q.

Platelets help in blood clotting.

1. True
2. False

Q. From which organ do erythrocytes originate?

Q. The process in which blood is artificially purified outside the body is called .

1. sedimentation
2. analysis
3. paralysis
4. dialysis

Q. Which of these is responsible for blood clotting?

(a) red blood cells
(b) white blood cells
(c) haemoglobin
(d) platelets

Q. Which type of blood cells help in the blood clotting process?

1. Red blood cells
2. Platelets
3. Plasma
4. White blood cells

Q. A person bruised and there was excessive bleeding for long time. This indicates low:

1. platelet count in the blood
2. haemoglobin in the blood
3. white blood cell count in the blood
4. red blood cell count in the blood