Bio 202 Exam 1 Set Questions And Answers

Examine the disorders of too many and too few of each type of formed element. {Ans: Anemia: low RBC count, less oxygen carrying capacity Polycythemia: excess RBC Leukocytosis: high WBC count Leukopenia: low WBC count Thrombocytosis: high platelet count Thrombocytopenia: low platelet count}Indicate the formed elements of the blood, their structure, function, and development. {Ans: Platelets Monocytes Neutrophil Basophil Lymphocyte Eosinophil}Describe the effects of the divisions of the autonomic nervous system on the heart. {Ans: Sympathetic postganglionic fibers are adrenergic Parasympathetic vagus nerves have cholinergic, inhibitory effects on the SA and AV nodes Without influence from the cardiac centers, the heart has a intrinsic "natural" firing rate of 100 bpm Vagal tone-holds down this heart rate to 70-80 bpm at rest}What is erythropoiesis? What stimulates erythropoiesis? Explain the fate and destruction of erythrocytes (how are the components of RBCs recycled). {Ans: Erythropoiesis is erythrocyte production Pluripotent stem cell → colony forming unit → erythroblast → reticulocyte → erythrocyte Needs iron, vitamin b and folic acid, vitamin c and copper}Be able to FULLY describe the flow of blood through the heart, including the systemic and pulmonary circuits. Include the chambers, valves and blood vessels involved. Also note