Animal Tissue: Blood
Which formed element of blood is primarily responsible for initiating coagulation via surface phospholipids?
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About This Question
- Subject
- biology
- Chapter
- structural organisation in animals and plants
- Topic
- animal tissue: blood
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Platelets
- Blood Components: Plasma and formed elements (RBCs, WBCs, and Platelets).
- Platelets (Thrombocytes): Tiny cell fragments derived from megakaryocytes in the bone marrow.
- Hemostasis: When a blood vessel is injured, platelets aggregate to form a plug.
- Coagulation: Platelets release several factors and provide complex phospholipid surfaces that serve as a platform for the activation of clotting factors (like prothrombin being converted to thrombin).
- Significance: They are essential for blood clotting; a reduction in their count leads to clotting disorders.
This easy difficulty biology question is from the chapter structural organisation in animals and plants, covering the topic of animal tissue: blood. It appeared in the 2025 exam.
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