NURSING ANM AND GNM

Detailed explanation-1: -Notes: The main cause of capillarity is the difference in pressures on two sides of (concave and convex) curved surface of liquid.

Detailed explanation-2: -The dilatation of arterioles increases blood flow to the downstream capillaries, and some reduction in blood pressure causes a decrease in resistance. Therefore, there is a blood pressure drop in the capillaries due to the dilatation of arterioles, which increases blood flow to the downstream capillaries.

Detailed explanation-3: -Adhesion of water to the walls of a vessel will cause an upward force on the liquid at the edges and result in a meniscus which turns upward. The surface tension acts to hold the surface intact. Capillary action occurs when the adhesion to the walls is stronger than the cohesive forces between the liquid molecules.