Q. Serotonin in the blood (Solved)
1. Relaxes blood vessels
2. Prevents clotting of the blood
3. Helps in clotting of blood
4. Constricts blood vessels
- d. Constricts blood vessels
1. Relaxes blood vessels
2. Prevents clotting of the blood
3. Helps in clotting of blood
4. Constricts blood vessels