Question 12
The figure below is a blood vessel diagram. In addition to the heart pumping, the blood flow is also caused by a rhythmic contraction of blood vessel muscle.
When the muscle contracts, which part of blood vessel will undergo a pressure changing? (Score: 5)
a. P and Q
b. Q and R
c. R and S
d. P and S
e. all parts of contracted blood vessel walls
When the muscle contracts, which part of blood vessel will undergo a pressure changing? (Score: 5)
a. P and Q
b. Q and R
c. R and S
d. P and S
e. all parts of contracted blood vessel walls