Hema 2 Lecture Quiz 3

Which of the following best describes platelets?

• Nucleated blood cells

• Derived from megakaryocytes

• Largest cells in the bone marrow

• Responsible for oxygen transport

Which hormone regulates megakaryocyte development and platelet production?

• Erythropoietin

• Thrombopoietin

• Leukopoietin

• Hemopoietin

Which platelet precursor cell stage has the highest nucleus-to-cytoplasm (N/C) ratio?

• Megakaryoblast

• Promegakaryocyte

• Granular megakaryocyte

• Platelet

What is the process in which megakaryocytes undergo DNA replication without cellular division?

• Endocytosis

• Endomitosis

• Phagocytosis

• Exocytosis

Where are platelets stored before being released into circulation?

• Liver

• Kidney

• Spleen

• Lungs

Which of the following platelet precursors has multiple lobulated nuclei and coarse chromatin?

• Megakaryoblast

• Promegakaryocyte

• Granular megakaryocyte

• Platelet

Which of the following factors stimulates megakaryocyte progenitor cell production?

• Granulocyte colony-stimulating factor (G-CSF)

• Megakaryocyte colony-stimulating factor (Meg-CSF)

• Erythropoietin

• Interleukin-2

How long does it take for a megakaryocyte to mature into a platelet?

• 2 days

• 3 days

• 5 days

• 7 days

Which of the following best describes the primary function of platelets?

• Oxygen transport

• Immune response

• Hemostasis

• Energy production

Which platelet zone contains glycocalyx and glycoproteins?

• Peripheral zone

• Sol-gel zone

• Organelle zone

• Submembrane area