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Questions and Answers
What is the role of platelets in blood?
What is the role of platelets in blood?
- To play a role in clotting (correct)
- To fight infections
- To regulate erythropoiesis
- To prevent backflow of blood
What is the extrinsic clotting pathway?
What is the extrinsic clotting pathway?
- A pathway that involves tissue factor (correct)
- A pathway that involves thromboxane A and ADP
- A pathway that involves thromboplastin
- A pathway that involves von Willebrand factor
What is erythropoiesis?
What is erythropoiesis?
- The regulation of erythropoietin
- The increase in response to low oxygen levels
- The process of red blood cell production (correct)
- The mutation causing erythrocytes to take on a sickle shape
What is the function of hemoglobin?
What is the function of hemoglobin?
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What is the effect of testosterone on hematocrit?
What is the effect of testosterone on hematocrit?
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What is the role of thromboxane A and thromboplastin in platelet aggregation?
What is the role of thromboxane A and thromboplastin in platelet aggregation?
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What is the function of heart valves?
What is the function of heart valves?
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Study Notes
Key Concepts in Cardiovascular Physiology
- Blood is composed of formed elements (platelets, red and white blood cells) and plasma.
- Platelets play a role in clotting, while white blood cells fight infections.
- Individuals assigned male at birth have a greater hematocrit due to testosterone.
- Sickle cell disease involves a mutation causing erythrocytes to take on a "sickle" shape, leading to reduced oxygen delivery.
- Erythropoiesis is regulated by erythropoietin and increases in response to low oxygen levels.
- Phagocytosis is performed by neutrophils and monocytes.
- Thromboxane A and ADP, and von Willebrand factor play roles in platelet function and clotting.
- Tissue factor is part of the extrinsic clotting pathway.
- Hemoglobin binds oxygen at the globin chain and carbon dioxide at the heme group.
- Heart valves prevent backflow of blood and facilitate stroke volume.
- Platelets are stimulated to aggregate by thromboxane A and thromboplastin.
- Cardiac cells share their intracellular fluid through intercalated discs and gap junctions.
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