1. Which of the following hormones is responsible for regulating blood sugar levels in the body? A. Insulin B. Glucagon C. Cortisol D. Thyroid hormone Answer: A. Insulin Rationale: Insulin is produced by the pancreas and is responsible for lowering blood sugar levels by promoting the uptake of glucose by cells. 2. Which of the following processes involves the breakdown of glucose to produce ATP? A. Glycolysis B. Gluconeogenesis C. Ketogenesis D. Glycogenesis Answer: A. Glycolysis Rationale: Glycolysis is the process by which glucose is broken down into pyruvate, which can then be utilized by the mitochondria to produce ATP. 3. Which of the following organs is responsible for maintaining fluid and electrolyte balance in the body? A. Liver B. Kidneys C. Pancreas D. Spleen Answer: B. Kidneys