1.) The second choice - Fluid levels could not be maintained. Kidneys manage fluid levels, electrolyte balance, and other factors that keep the internal environment of the body within constant parameters.
2.) The third option - secrete fluids that protect the inside of the trachea. Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing.
3.) Letter B - Alan is trying to prevent acne but failing to prevent skin cancer. Since not wearing sunscreen causes skin cancer. And oily skin can cause acne.
4.) Letter A - lupus. Lymphatic disease is a class of disorders which directly affect the components of the lymphatic system - a network of tissues and organs that help rid the body of toxins, waste and other unwanted materials. In lupus, the immune system inappropriately attacks tissues in various parts of the body. This abnormal activity leads to tissue damage and illness.
5.) Letter A - Systemic circulation involves movement of the blood between the heart and the body, while coronary circulation involves movement of the blood within the heart. Systemic circulation occurs between the heart and the entire body while Coronary circulation is the circulation of blood in the blood vessels of the heart muscle (myocardium).
