The answer should be A, the age difference between participants.
Answer:
“Most of these kids are not smokers,” said Robin Koval, CEO and ... is trying to sell a do-gooder image and what Americans think about it.
Explanation:
Answer:
The correct answer is d. circulatory, nervous, urinary, and endocrine systems
Explanation:
Many organ systems together helps in regulating the blood pressure in the body. For example, in the case of stress, the autonomous nervous system helps in raising the heart rate that increases blood pressure in arteries and veins.
Circulatory system contains blood vessels, blood and heart and heartbeat and blood vessel thickness changes with the change in some endocrine hormone levels like cortisol, adrenalin which regulates the blood pressure.
The urinary system helps in the regulation of blood pressure by filtering water from blood. Therefore circulatory, nervous, urinary, and endocrine systems work together and regulate blood pressure.
