a. Describe the appearance of platelets and state their major function.b. Why should platelets not be called 'cells'?

If you had a high hematocrit, would you expect your hemoglobin determination to be low or high? Why?

a. Describe the process of erythropoiesis.b. What name is given to the immature cell type released to the circulation?c. How does it differ from a mature erythrocyte?

Name as many different categories of substances carried in plasma as you can.

Name the formed elements that arise from myeloid stem cells. Name those arising from lymphoid stem cells.

Erythropoietin directly stimulates RBC formation by (a) increasing rates of mitotic divisions in erythroblasts, (b) speeding up the maturation of red blood cells, (c) accelerating the rate of hemoglobin synthesis, (d) all of these.

If you had a high hematocrit, would you expect your hemoglobin determination to be high or low? Why?

Discuss hemoglobin relative to its chemical structure, its function, and the color changes it undergoes during loading and unloading of oxygen.

A middle-aged college professor from Boston is in the Swiss Alps studying astronomy. He arrived two days ago and plans to stay the entire year. However, he notices that he is short of breath when he walks up steps and that he tires easily with any physical activity. His symptoms gradually disappear; after two months, he feels fine. Upon returning to the United States, he has a complete physical exam and is told that his erythrocyte count is higher than normal. (a) Attempt to explain this finding. (b) Will his RBC count remain at this higher-than-normal level? Why or why not?