Practice - Platelets
Practice Questions
Test your understanding with targeted questions
What is the biological name for platelets?
- Answer: Thrombocytes.
- Hint: It starts with "thrombo-," which relates to clots.
💡 Hint: It starts with "thrombo-," which relates to clots.
From which large bone marrow cells do platelets originate?
- Answer: Megakaryocytes.
- Hint: The name implies a "large-nucleus cell."
💡 Hint: The name implies a "large-nucleus cell."
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the typical lifespan of a platelet in the human bloodstream?
- Type: mcq
- Options: 120 days, 24 hours, 7 to 10 days, 1 month
- Correct Answer: 7 to 10 days
- Explanation: Unlike red blood cells which live for months, platelets are rapidly cycled and replaced.
- Hint: It is a very short period, just over a week.
💡 Hint: It is a very short period, just over a week.
True or False: Platelets are produced in the spleen.
- Type: boolean
- Options: True, False
- Correct Answer: False
- Explanation: Platelets are produced in the bone marrow from megakaryocytes.
- Hint: Bone marrow is the primary factory for most blood components.
💡 Hint: Bone marrow is the primary factory for most blood components.
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Challenge Problems
Push your limits with advanced challenges
A patient has a condition where their platelets cannot change shape after adhering to a wound. Predict the impact on the clotting process.
- Solution: The "Activation" and "Aggregation" phases would be severely impaired. Without changing into a "spiky" shape, platelets cannot effectively interlock or provide a large enough surface area for chemical signals. This would result in a weak, unstable platelet plug, leading to prolonged bleeding times.
- Hint: Look at the "Activation" section of the detailed summary.
💡 Hint: Look at the "Activation" section of the detailed summary.
Using the bakery analogy from the Audio Book, explain how a bone marrow disorder affecting megakaryocytes would influence the "bakery's" output.
- Solution: If the "chefs" (megakaryocytes) are diseased or absent, no new "pastries" (platelets) can be produced. Since the existing pastries have a very short shelf-life (7-10 days), the inventory would quickly hit zero, leaving the "customers" (injured blood vessels) without any way to seal leaks.
- Hint: Connect the precursor cell health to the circulating platelet count.
💡 Hint: Connect the precursor cell health to the circulating platelet count.
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