Tag: blood clotting

Questions Related to blood clotting

Name the blood cells whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body

biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

  1. Thrombocytes

  2. Erythrocytes

  3. Leucocytes

  4. Neutrophils.

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Correct Option: A

Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body

biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

  1. Erythrocytes

  2. Leucocytes

  3. Neutrophills

  4. Thrombocytes

Show answer
Correct Option: D
Explanation:

Thrombocytes are also called Platelets. They are the vital component of blood. It's basic function is to stop bleeding by clumping and clotting blood vessel injuries. Its main function is to contribute to hemostasis that is the process of stop bleeding by adhesion. Reduction in the number of platelets causes clotting disorder and thus loss of blood from the body.

Hence, the correct option is D.

How many of the following nutrients, follow fol-lowing route of absorption
Blood capillaries $\rightarrow$ Mesentric vein $\rightarrow$ Hepatic portal vein $\rightarrow$ Liver $\rightarrow$ Hepatic vein $\rightarrow$ IVC $\rightarrow$ Heart $\rightarrow$ Body
(i) Glucose
(ii) Galactose
(iii) Fructose
(iv) L-amino acids
(v) D-amino acids
(vi) Long chain fatty acids.

biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

  1. Six

  2. Five

  3. Only one

  4. Three.

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Correct Option: A

What will happen if platelets were absent in the blood?

biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

  1. The process of clotting will be affected.

  2. Kwashiorkor will be the result.

  3. RBC will be ruptured.

  4. The blood will become more liquid.

Show answer
Correct Option: A
Explanation:

Platelets are the colourless cell fragments present in the blood. They are involved in the clotting. In the absence of platelets, the process of clotting will be affected. If there will be any wound when platelets are absent, the animal will die by shredding of all the blood.

Therefore, the correct answer is option A.

One of the common symptoms observed in people infected with dengue fever is

biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

  1. Significant decrease in RBC count

  2. Significant decrease in WBC count

  3. Significant decrease in platelets count

  4. Significant increase in platelets count

Show answer
Correct Option: C
Explanation:
Dengue is a type of fever caused by the dengue virus and propagated by mosquitoes. A significant decrease in the number of platelets is observed in this disease.
Thus, the correct answer 'Significant decrease in platelets count.'

Identity the wrongly matched pairs 

biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

  1. Monocyte - Actively phagocytic

  2. Thrombocyte - Produces antibodies

  3. Lymphocyte - Initiates blood clotting

  4. Eosinophil - Associated with allergy

Show answer
Correct Option: B
Explanation:

Monocytes are actively phagocytic and they take in the invading pathogen or cell through the method of phagocytosis.

thrombocytes are also known as platelet and the main function is in blood clotting. They do not produce any antibodies.
Lymphocytes have to play an important role in the immune system as well as blood clotting. 
Eosinophil cells are also responsible for immunity and are associated with allergic reactions in the body caused due to allergents as well as some infections.
So the correct answer is ' Thrombocyte- Produces antibodies'.

Platelets are formed by .....P ..... of special cells in ....Q.......

biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

  1. P - Division , Q - Bone Marrow

  2. P - Division , Q - Lymph nodes

  3. P - Fragmentation , Q - Bone Marrow

  4. P - Fragmentation , Q - Lymph nodes

Show answer
Correct Option: C
Explanation:

Platelets are formed by the fragmentation of special cells named megakaryocytes in bone marrow cell so answer is option.        

 C. P- FRAGMENTATION , Q - Bone marrow

Megakaryocyte forms

biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

  1. Leucocytes

  2. Erythrocytes

  3. Monocytes

  4. Thrombocytes

Show answer
Correct Option: D
Explanation:

A megakaryocyte is a large bone marrow cell with a lobulated nucleus, responsible for the production of blood thrombocytes (platelets), which are necessary for normal blood clotting. 

Critical count of platelet is

biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

  1. 40, 000 / mm$^3$

  2. 1 lac / mm$^3$

  3. 2 lac / mm$^3$

  4. 4 lac / mm$^3$

Show answer
Correct Option: A
Explanation:

Critical count of platelet is 40, 000 / mm$^{3}$. Platelets, also called thrombocytes, are blood cells whose function is to stop bleeding. Platelets have no nucleus: they are fragments of cytoplasm, which are derived from the megakaryocytes of the bone marrow, and then enter the circulation. These unactivated platelets are biconvex discoid structures. The normal number of platelets in the blood is 150,000 - 400,000 platelets per microliter (mcL). A low platelet count is below 150,000. If the platelet count is below 50,000, the risk of bleeding is very high. So, it is called critical platelet count.

Life span of blood platelets in mammals is about

biology blood circulatory system of human blood clotting platelets and their function defence against infectious disease

  1. 3 days

  2. 8 days

  3. 1 month

  4. 20 days

Show answer
Correct Option: B
Explanation:
Platelets are the smallest of the three major types of blood cells. Platelets are anuclear cytoplasmic fragments essential for blood clotting and wound healing. Blood platelets begin their lives as hematocytoblasts, or stem cells. Blood platelets have a life span of 8-10 days, at the end of which they undergo programmed cell death or apoptosis.
Hence, answer is '8 days'.