Predict if the AV and semilunar valves are open or closed during the following p

Question

Predict if the AV and semilunar valves are open or closed during the following phases of the cardiac cycle by selecting the appropriate answer in this table 11. State of AV Valves State of Semilunar Valves Isovolumetric Contraction Open Closed Open Closed Isovolumetric Relaxation Open Closed Ventricular Ejection Open Closed Closed Ventricular Filling Open Closed Closed The cell that is the progenitor of all the types of blood cells is called the A. pluripotent hematopoietic stem cell. B. committed progenitor cell. C. megakaryocyte D. reticulocyte 12· Mast cells in tissues are considered to be a type of A. eosinophil. B. basophil. C. lymphocyte D. monocyte E. neutrophil. 13. 14. regulates the growth and maturation of megakaryocytes A. Erythropoietin B. Interleukin C. Thrombopoietin D. Colony-stimulating factor In normal adults, red blood cells are formed in A. the liver B. the spleen C. red bone marrow. D. lymph nodes 15.

Explanation / Answer

12. The answer is A. Pluripotent hematopoietic stem cell.
13. The answer is B. basophil
14. The answer is C. Thrombopoietin
15. The answer is C. red bone marrow.

I am not sure about 11 th qeustion, so I left it...

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