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🔬 Biology  ·  Body Fluids and Circulation  ·  NEET

The final soluble protein converted into insoluble fibrin threads during blood clotting is:

Answer: Fibrinogen.

  • A Thrombin
  • B Heparin
  • C Thromboplastin
  • D Fibrinogen

Correct answer: D. Fibrinogen

Explanation: Thrombin catalyses the conversion of soluble fibrinogen into insoluble fibrin, which forms the mesh of a blood clot.

ECG: The Three Key WavesP wave(atrial depol.)QRS complex(ventricular depol.)T wave(ventricular repol.)QRS is the tallest spike - ventricles have far more muscle mass than the atria

A single ECG cycle: the P wave marks atrial depolarisation (contraction signal), the large QRS complex marks ventricular depolarisation, and the T wave marks ventricular repolarisation (recovery) before the next cycle begins.

Concept context

Blood, lymph, the heart, the cardiac cycle, blood pressure, and ECG. High NEET weightage.

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