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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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Platelets function in _______.

  1. a. oxygen transport
  2. b. blood clotting
  3. c. thermal regulation
  4. d. movement of lymph

Summary Introduction

Concept introduction: Platelets or thrombocytes are one of the major components of blood, which are meant to react to bleeding from any blood vessels by the formation of clumps. They are actually the fragments of cytoplasm circulating in the blood, derived from bone marrow. A range of 150,000 to 450,000 per micro liter is the normal count of platelets in blood.

Explanation

Reason for correct answer: Platelets are the smallest of blood cells produced from bone marrow. It can be seen under a microscope only, and the major function associated with platelet is blood clotting. Whenever a blood vessel gets broken, it starts to produce some sort of signals to the platelets in the blood. As soon as the signal enters, platelets start to migrate to the effective region and transforms into their active forms, which then produces clumps together with other clotting factors.

Option b. is given as “blood clotting”.  Platelets are the only cells in the blood that produce clotting at a broken blood vessel. Therefore, option b. is the correct answer.

Reasons for incorrect answers:

Option a...

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