Jab tum cut ho jaate ho, tumhare blood mein tiny bits jinhe platelets kehte hain, daud ke hole par aate hain aur sticky rice ki tarah chipak jaate hain. Phir ek chemical "kaanchi" jise thrombin kehte hain switch on hoti hai aur ek floating stringy protein ko kaatne lagti hai bahut saare tiny threads (fibrin) mein. Ye threads platelets ke upar criss-cross hote hain jaise ek net, blood cells ko pakad lete hain, aur scab mein sukh jaate hain. Clever part ye hai: kaanchi normally switched OFF rehti hai, taaki tumhara blood tumhare andar solid na ho — ye sirf wahaan on hoti hai jahan damage ho. Calcium aur vitamin K chhote helpers hain jo poori cheez kaam karti rakhte hain.
Prothrombin ko thrombin mein kaun activate karta hai?
Prothrombin activator (thromboplastin/prothrombinase) Ca²⁺ ki presence mein.
Kaun sa ion clotting ke kai steps par essential hai?
Calcium (Ca²⁺, Factor IV).
Clotting mein vitamin K ka role kya hai?
Liver ko ise prothrombin aur other clotting factors synthesise karne ke liye chahiye.
Extrinsic aur intrinsic pathways mein kya fark hai?
Extrinsic damaged tissue se tissue factor ke zariye trigger hota hai (fast); intrinsic blood ke andar factors use karke damaged vessel surface se contact se (slower). Dono prothrombin activator banate hain.
Clot mein fibrin ka kaam kya hai?
Ye ek insoluble mesh banata hai jo platelets aur blood cells ko trap karke permanent plug banata hai.
Clotting mein cascade kyun use hota hai?
Amplification ke liye (chhota trigger → bada fast clot) aur safety ke liye (kai OFF-switches random clots rokti hain).
Stored donated blood ko clot hone se kaise rokha jaata hai?
Ca²⁺ remove/bind karne ke liye citrate/EDTA mila ke.
Platelets sirf temporary plug kyun banate hain?
Ye bleeding pehle rokta hai lekin permanent clot ke liye fibrin protein mesh chahiye.
Intact vessel ke andar clot ko kya kehte hain (dangerous)?
