MTEL Biology Practice Exam

Correct Response: C. Among other functions, the liver helps control blood composition. It does this both by regulating the amount of sugar, fats, and proteins in the blood and by removing wastes and toxins, such as ammonia. Blood flow to the stomach (A) is largely regulated by hormones. Generation of all new red blood cells and most white blood cells occurs in the bone marrow (B). Control of peristalsis in the digestive tract is a function of the nervous system (D).