Exam 9: The Platelet

Laboratory results for a patient indicate that the platelet count is 89 × 10⁹/L. What is likely to be observed in the peripheral blood for this patient if the platelet count is the result of increased physiological platelet destruction?

Platelets play a major role in forming the primary hemostatic plug by all of the following actions except:

Which of the following describes how platelet clumping artificially alters platelet parameters?

Increased DNA content in exact multiples that are contained within a single nuclear envelope defines cells that are:

Platelets are derived from which of the following?

What is the typical concentration of platelets in the blood?

Explain how platelets contribute to : a. The innate immune response b. The adaptive immune response

The effect of thrombopoietin (TPO) on megakaryocytic cells can be described by all of the following except:

Nuclear replication without cytoplasmic division is defined as:

Which of the following represents a normal platelet number and morphology?

Identify the major cytokines that regulate platelet production and describe their effects on megakaryocytic cells and circulating platelets.

The normal reference interval for the mean platelet volume (MPV) is:

Which of the following criteria describes giant platelets?

During what stage of megakaryocyte development are the platelets released into the circulation?

On average, how long does a platelet live in the peripheral circulation?

Which of the following cells is defined as cytoplasmic extensions that are released in groups and fragmented into individual platelets?

Describe megakaryocyte development and the role of endomitosis and thrombopoietin in this process.

Which of the following cytokines stimulate progenitor megakaryocytes to proliferate?