All are true about blood coagulation except?
**Core Concept**
Blood coagulation is a complex process involving multiple pathways and factors that lead to the formation of a fibrin clot to stop bleeding. This process involves the intrinsic and extrinsic pathways, which converge to form a common pathway leading to the activation of thrombin and subsequent clot formation.
**Why the Correct Answer is Right**
The correct answer is related to the regulation of blood coagulation. The intrinsic and extrinsic pathways of blood coagulation converge to form a common pathway, which involves the activation of factor X by the factors of both pathways. This leads to the activation of prothrombin to thrombin, which then converts fibrinogen to fibrin, forming the clot.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify a true statement about blood coagulation.
**Option B:** This option is incorrect because it does not provide a true statement about blood coagulation.
**Option C:** This option is incorrect because it does not specify a true statement about blood coagulation.
**Clinical Pearl / High-Yield Fact**
The regulation of blood coagulation is crucial to prevent excessive bleeding and thrombosis. Understanding the pathways and factors involved in blood coagulation is essential for the management of bleeding disorders and thrombotic conditions.
**Correct Answer: A.**