10 Questions
What is the approximate number of platelets per cubic millimeter of blood?
$150,000 - 400,000/mm^3$
Which of the following is NOT a component of the central granulomere of platelets?
Rough endoplasmic reticulum
What is the primary function of the marginal bundles in the peripheral hyalomere of platelets?
Anchoring the platelet membrane to the cytoskeleton
Which of the following is NOT a function of blood platelets?
Oxygen transport in the bloodstream
Which of the following granules in platelets store adenosine diphosphate (ADP), adenosine triphosphate (ATP), and serotonin?
Delta (δ) granules
What is the primary function of the irregular tubular system in the peripheral hyalomere of platelets?
Storing calcium ions
Which of the following is responsible for clot retraction in platelets?
Contractile microfilaments
What is the approximate life span of platelets in the human body?
5-10 days
Which of the following conditions is associated with an increase in bleeding time?
Thrombocytopenia (decreased number of platelets)
What is the approximate diameter range of platelets?
2-4 µm
This quiz covers the cytological characteristics of Blood Elements, differentiation between stem progenitor and precursor cells of hemopoiesis, types of bone marrow, constituents of bone marrow, and stages of hemopoiesis. Taught by Ass.Prof.Dr.Safaa Said from Assuit University.
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