Question 1
Which tunic of an artery is most responsible for maintaining blood pressure and continuous blood circulation?
◦ tunica adventitia
◦ tunica externa
◦ tunica media
◦ tunica intima
Question 2
The influence of blood vessel diameter on peripheral resistance is ________.
◦ significant because resistance is directly proportional to the blood vessel diameter
◦ the only factor that influences resistance
◦ significant because resistance is inversely proportional to the fourth power of the vessel radius
◦ insignificant because vessel diameter does not vary