Practice Quiz

NAEP Science Grade 12

Category - Biology

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Which of the following is a function performed by the liver?
  1. Regulation of blood flow to the stomach during digestion.
  2. Generation of new red and white blood cells.
  3. Removal of wastes and toxins from the blood.
  4. Control of peristalsis in the digestive tract.
Explanation
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).
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