Lactase is an enzyme that breaks down a sugar found in milk. As the concentration of lactase increases, how will the rate of reaction be affected? It will increase without any upper limit
It will increase until substrates are used up
It will stay the same but will increase the pH level
It will stay the same but will increase the temperature

i think this picture will you.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.