What is encephalitis and what best describes the most common cause of encephalitis?

A. Tubular necrosis: Tubular necrosis refers to the death of tubular epithelial cells in the kidneys, commonly due to ischemia or toxins. This is not the primary defect in Potter syndrome, which involves developmental abnormalities rather than acute tubular injury.

B. Renal hyperplasia: Hyperplasia means increased cell number leading to organ enlargement. Potter syndrome typically involves renal hypoplasia or agenesis rather than hyperplasia, so this is not consistent with the syndrome’s defect.

C. Renal failure: Potter syndrome primarily results from bilateral renal agenesis or severe renal dysplasia, leading to absent or nonfunctional kidneys and subsequent renal failure. The lack of functional kidneys leads to oligohydramnios and the characteristic features of Potter syndrome.

D. Renal metaplasia: Metaplasia refers to abnormal transformation of one differentiated tissue type into another. This process is not the main defect in Potter syndrome, which is related to kidney development failure rather than abnormal tissue differentiation.

A. The liver metabolizes most components of food (protein, carbohydrates and fats) and also cleans the blood of bacteria and drugs: The liver plays a central role in metabolism, including converting nutrients into energy or storage forms, breaking down toxins, metabolizing drugs, and filtering bacteria from the blood via Kupffer cells.

B. The liver maintains a balanced level of electrolytes and pH in the body and stores glucose, minerals and vitamins: While the liver stores glycogen and some vitamins and minerals, it does not directly regulate electrolyte or pH balance, which is primarily the function of the kidneys and respiratory system.

C. The liver is responsible for the absorption of most dietary nutrients as well as the production of growth hormones: Nutrient absorption is mainly the role of the small intestine. Growth hormone is produced by the pituitary gland, not the liver, making this statement inaccurate.

D. The liver contributes to the metabolism of ingested food and provides the fluids that the GI tract requires: Although the liver produces bile, which aids in fat digestion, it does not supply most of the fluids needed by the GI tract. Salivary glands, gastric glands, pancreas, and intestines contribute the majority of GI fluids.