Which statement is true regarding hemophilia?
Hemophilia is not hereditary in nature.
Hemophilia can be treated by replacement therapy.
Hemophilia is an X-linked dominant genetic disorder.
Hemophilia B is the most common form of hemophilia.
The Correct Answer is B
Choice A rationale:
Hemophilia is a hereditary disorder caused by a deficiency of specific clotting factors, and it is indeed hereditary in nature. This statement is incorrect.
Choice B rationale:
Hemophilia is a bleeding disorder where the blood does not clot properly. Replacement therapy, which involves infusing clotting factor concentrates, is a standard treatment for hemophilia. This statement is correct.
Choice C rationale:
Hemophilia is an X-linked recessive genetic disorder, not dominant. Males are more commonly affected because they have only one X chromosome, and if it carries the defective gene, they will have hemophilia. Females have two X chromosomes, and if one X chromosome carries the defective gene, the other X chromosome can compensate, making them carriers but not typically affected.
Choice D rationale:
Hemophilia A is the most common form of hemophilia, not hemophilia B.
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Related Questions
Correct Answer is C
Explanation
Choice A rationale:
Serotonin is a neurotransmitter that plays a role in mood regulation, sleep, and other functions in the body. It is not a component that forms an adhesive bridge between platelets and vascular subendothelial structures in the clotting process.
Choice B rationale:
Platelet factor III is not a component that forms an adhesive bridge between platelets and vascular subendothelial structures in the clotting process. Platelet factor III is not widely recognized in the context of clotting; it is more commonly referred to as tissue factor and is involved in the extrinsic pathway of coagulation.
Choice C rationale:
Von Willebrand factor (VWF) is a protein that plays a crucial role in hemostasis. It forms an adhesive bridge between platelets and vascular subendothelial structures, particularly at sites of vascular injury. VWF helps platelets adhere to the injured vessel wall, leading to the formation of a stable blood clot. This process is essential for preventing excessive bleeding. A deficiency or dysfunction in VWF can lead to von Willebrand disease, a bleeding disorder characterized by prolonged bleeding times.
Choice D rationale:
Adenosine diphosphate (ADP) is a molecule released by platelets when they are activated. ADP helps in the aggregation of platelets, but it does not directly form an adhesive bridge between platelets and vascular subendothelial structures.
Correct Answer is D
Explanation
Choice A rationale:
This statement is incorrect. Mexican Americans do not have higher rates of good blood pressure control compared to other populations.
Choice B rationale:
This statement is incorrect. Mexican Americans are not more likely to receive treatment for hypertension compared to other populations.
Choice C rationale:
This statement is incorrect. While hypertension is prevalent among Mexican Americans, stating they have the highest prevalence of hypertension in the world is inaccurate. The prevalence of hypertension is influenced by various factors and can vary across different regions globally.
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