When you apply the brakes, brake fluid is forced under pressure into the wheel cylinder, which in turn pushes the brake shoes into contact with the machined surface on the inside of the drum. When the pressure is released, return springs pull the shoes back to their rest position.
Normally, protein is not removed when the kidneys filter waste from the blood. However, when the kidneys are damaged, protein leaks through the damaged filters and is removed from the body in the urine, along with the waste products.
Causes. Your kidneys filter waste products from your blood while retaining components your body needs â including proteins. However, some diseases and conditions can allow proteins to pass through the filters of your kidneys, causing protein in urine. Conditions that can cause a temporary rise in the levels of protein in urine, but don't necessarily indicate kidney damage, include: 1  Cold exposure. 2  Emotional stress. 3  Fever. 4  Heat exposure. 5  Strenuous exercise.