Which of the following has the greatest effect on blood flow to the tissues?
A)diffusion distance across vessel walls
D)blood pH levels
E)collagen fiber content of tunica externa
Consider a blood pressure reading of 120/80. 120 corresponds to the
D)mean arterial pressure.
E)blood osmotic pressure.
Which of the following is(are)the only factor(s)that can be adjusted by the nervous or endocrine system to regulate blood flow?
D)vascular resistance and viscosity
E)turbulence and viscosity
The third and fourth heart sounds are generated by