Which is the only type of muscle tissue that is voluntary?

A. Mucous: Mucous membranes line cavities that open to the exterior, such as the respiratory, digestive, and urinary tracts.

B. Serous: Serous membranes line body cavities (such as the peritoneum, pleura, and pericardium) that do not open to the outside and produce serous fluid to reduce friction between organs.

C. Cutaneous: The cutaneous membrane is the skin, which covers the external body surface.

D. Synovial: Synovial membranes line joint cavities and secrete synovial fluid to lubricate the joints.

A. Formation of large amounts of ATP: Large ATP production occurs in aerobic respiration, not anaerobic metabolism. Lactic acidosis happens when there is a lack of oxygen and insufficient ATP production.

B. Muscle soreness: While lactic acid buildup may contribute to temporary muscle discomfort, muscle soreness alone does not indicate lactic acidosis, which is a systemic condition.

C. Formation of ketone bodies: Ketone bodies are produced during fat metabolism (e.g., in diabetic ketoacidosis), not anaerobic glucose metabolism.

D. Anaerobic breakdown of glucose: When oxygen levels are low, cells undergo anaerobic respiration, converting glucose to lactic acid instead of completely breaking it down through aerobic respiration. This leads to lactic acidosis.