INBDE (Integrated National Board Dental Examination) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Ace your INBDE with our comprehensive practice exam. Featuring detailed explanations, interactive flashcards, and a wide array of multiple-choice questions designed to mirror the real test. Get ready to surpass your expectations!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the life span of platelets?

3-5 days
7-10 days
12-15 days
20-25 days

The correct answer is: 7-10 days

Platelets, also known as thrombocytes, are small cell fragments that play a crucial role in blood clotting. The correct answer is 7-10 days because the average lifespan of platelets in the human body is around 7 to 10 days. During this time, platelets continuously circulate in the blood, ready to be activated in response to injury or other triggers that initiate the clotting process. Platelets are eventually removed by the spleen and liver after their lifespan, and new platelets are constantly produced by megakaryocytes in the bone marrow to maintain normal levels in the blood. Option A (3-5 days) is too short for the lifespan of platelets. Platelets typically survive longer than 3-5 days before being cleared from the bloodstream. Options C (12-15 days) and D (20-25 days) overestimate the lifespan of platelets. Platelets are usually removed from circulation before reaching 12-15 days or 20-25 days, making these options incorrect.