Practice Quiz

NAEP Science Grade 12 - Question List

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166.
A veterinarian finds that a cat has a lesion on its hypothalamus. This injury would most directly affect the cat's ability to:
  1. Coordinate muscle movements.
  2. Regulate its body temperature.
  3. Perceive visual stimuli.
  4. Control its breathing.
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167.
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.
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168.
Which of the following best describes the function of bile salts in the process of digestion?
  1. Bonding to the surface of amino acids to allow them to be actively pumped against the concentration gradient by epithelial cells.
  2. Lowering stomach pH to produce the acid environment necessary for the proper functioning of enzymes and the destruction of pathogens.
  3. Coating fat droplets and preventing them from coalescing to expose more surface of the droplets to the action of hydrolytic enzymes..
  4. Cleaving bonds of amino acids to break long polypeptide chains into smaller segments that can be more easily absorbed.
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169.
Which of the following is the primary cause of most peptic ulcers in humans?
  1. Bacterial infection.
  2. Frequent ingestion of spicy foods.
  3. Viral eruption.
  4. Regular use of antacids.
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170.
Which of the following best describes an important role of the lymphatic system in circulation?
  1. Returning fluid and blood proteins lost by capillaries back to the veins.
  2. Transporting carbon dioxide released from cells to the bloodstream.
  3. Maintaining electrolyte balance of body fluids within tolerance limits.
  4. Removing toxins from the blood before they damage the heart.
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