Question
Question: Muscle cells are not found in the wall of capillaries since...
Muscle cells are not found in the wall of capillaries since
A
They have to be thin to allow effective diffusion of materials
B
Blood flow through them is regulated by capillary sphincters
C
Shunts between arterioles and venules control flow of blood in capillaries
D
All of the above
Answer
Blood flow through them is regulated by capillary sphincters