Hemostasis

Thrombocytes are...

• RBC

• WBC

• Platelets

Platelets are real cells

• True

• False, they are actually cytoplasmic fragments

There are more thrombocytes (150K-400K) than RBC

• True

• False, there are more thrombocytes than WBC not RBC

Thrombocytes circulate for 8-10 days and then are broken down and recycled

• True

• False

What is the function of thrombocytes

• Involved in clot formation

• Secretes clotting factors

• Secrete vasoconstrictors to prevent fluid loss

• Secrete chemicals for Chemotaxis of WBC towards inflammation sites

This occurs when there is over 400k platelets and excessive clots formed in blood vessels (thrombosis)

• Thrombocytosis

• Thrombocytopenia

This occurs when there is less than 100k platelets which causes excessive internal bleeding...hemorrhagic spots and hematoma in response to minor trauma

• Thrombocytosis

• Thrombocytopenia

Hemopoietic stem cell in red bone marrow divide to form....

• myeloid stem cells

• lymphoid stem cells

Tags

NGSS.HS-LS1-4

Myeloid stem cells (from hemopoietic stem cell) divide to form megakaryoblasts which from megakaryocyte. The cytoplasm breaks up and forms platlets

• True

• False, this is all a lie.

Tags

NGSS.HS-LS1-4

Platelets are formed from pieces of the cytoplasm of megakaryocyte

• True

• False, its from lymphoid cells

Tags

NGSS.HS-LS1-4