Question

What is the effect of an increase in diameter (dilation) in blood capillaries?

a) Increase in the rate of blood flow, Increase in permeability to blood vessel wall, Increase in supply of blood
b) Increase in the rate of blood flow, Decrease in permeability to blood vessel wall, Increase in supply of blood
c) Decrease in the rate of blood flow, Increase in permeability to blood vessel wall, Decrease in supply of blood
d) Decrease in the rate of blood flow, Decrease in permeability to blood vessel wall, Decrease in supply of blood

Answer 1

An increase in diameter (dilation) in blood capillaries results in an increased rate of blood flow, an increase in permeability to the blood vessel wall, and an increase in the supply of blood.

Step-by-step explanation:

An increase in diameter (dilation) in blood capillaries has the following effects:

1. Increased rate of blood flow: When the diameter of a blood vessel increases, there is less blood contacting the vessel wall, resulting in lower friction and resistance. This leads to an increase in the rate of blood flow.
2. Increase in permeability to blood vessel wall: Dilation of blood capillaries can increase the permeability of the blood vessel wall, allowing for the exchange of nutrients, gases, and waste products between the blood and surrounding tissues.
3. Increase in supply of blood: By dilating the blood capillaries, more blood can flow through them, increasing the supply of blood to the tissues and organs.