Correct option:(1)Thrombin
Solution:
- During coagulation of blood, an enzyme complex thrombokinase helps in the conversion of prothrombin (present in plasma) into thrombin.
- Thrombin further helps in the conversion of inactive into fibrins which form network of threads.
- Renin is secreted by JG cells in response to fall in glomerular blood flow.
- It converts angiotensinogen in blood to angiotensin-I
- Epinephrine or adrenaline is secreted by adrenal medulla in response to stress of any kind and
during emergency.