Platelets

Platelets

“What are platelets? A detailed question and answers guide”

Question 1. Platelets.
Answer:

• They are small, colourless, non-nucleated spherical, oval or rounded granular bodies.
• Size: 2.5 m in diameter.
• Normal count:
  • 2,50,000 (2,00,000 to 4,00,000)/cu mm of blood.
• Properties: 3A’s
  • Adhesiveness
  • Aggregation Agglutination

“Understanding platelets through FAQs: Composition, functions, and uses explained”

Functions:

1. Prevents blood looss
2. Helps in blood coagulation by forming prothrombin activator.
3. Helps in clot retraction as it contains contractile proteins.
4. Contribute in repair of ruptured blood vessel.
5. Stores 5-HT and histamine and release when needed.
   • Life-span: 10 days.

“Factors influencing success with platelet studies: Q&A”

Question 2. Prothrombin time.
Answer:

Definition:

• The time taken by blood to clot after adding tissue thromboplastin is called prothrombin times.
• It indicates the total quantity of prothrombin present in the blood.

Normal time-12 seconds:

Prolonged in:

• Deficiency of prothrombin.
• Deficiency of clotting factors I, V, VII and X

“Importance of studying platelets for medical students: Questions explained”

Question 3. Pro-coagulants.
Answer:

• They are hemostatic agents which accelerate the process of blood coagulation.
• They are:

“Common challenges in mastering platelet notes effectively: FAQs provided”

Question 4. Anticoagulants.
Answer: