Question

With decrease in resistance in blood vessels, there will be an increase in blood flow. Which of the following will cause decreased resistance?

a
Low blood viscosity decreases resistance in blood flow.

b
High blood viscosity decreases resistance in blood flow.

c
Low pH in the blood will decrease resistance in blood flow.

d
Changes in red blood cell shape will decrease resistance in blood flow.

Answer 1

Option A is correct. Low blood viscosity decreases resistance in blood flow. Blood viscosity refers to the thickness or stickiness of blood, which is determined by the concentration of red blood cells and other components in the blood. When the viscosity of blood decreases, the resistance to blood flow decreases, leading to an increase in blood flow.