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Eighth Grade (Grade 8) Respiration, Digestion, and Excretion Questions

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Grade 8 Respiration, Digestion, and Excretion
Which is the correct order of structures that gas passes through when breathing in?
  1. trachea, bronchus, alveoli, bronchiole
  2. bronchus, alveoli, bronchiole, trachea
  3. trachea, bronchus, bronchiole, alveoli
  4. bronchus, bronchiole, trachea, alveoli
Grade 8 Respiration, Digestion, and Excretion
What are the grapelike structures found in the lungs?
  1. trachea
  2. bronchi
  3. alveoli
  4. cilia
Grade 8 Respiration, Digestion, and Excretion
Where are the bronchioles located?
  1. in the throat
  2. in the trachea
  3. at the end of the bronchial tubes
  4. below the diaphragm
Grade 8 Respiration, Digestion, and Excretion
What chemical comes from the breakdown of protein and must be eliminated?
  1. nephron
  2. salt
  3. water
  4. urea
Grade 8 Respiration, Digestion, and Excretion
What is the primary function of the gallbladder?
  1. stores bile
  2. cleans cells
  3. cleans blood
  4. creates bile
Grade 8 Respiration, Digestion, and Excretion
The process of passing solid food waste out of the body is elimination.
  1. True
  2. False
Grade 8 Respiration, Digestion, and Excretion
The liquid that food becomes after it is in the stomach is
  1. acid.
  2. bile.
  3. chyme.
  4. feces.
Grade 8 Respiration, Digestion, and Excretion
Which statement describes what happens when you breathe out?
  1. The diaphragm relaxes into an upward position, the ribs settle downward, the space shrinks, and air is forced out of the lungs.
  2. The diaphragm contracts and drops down, the ribs expand outward, the space shrinks, and air rushes out of the lungs.
  3. The diaphragm contracts and drops down, the ribs expand outward, the space increases, and air rushes into the lungs to fill the space.
  4. The diaphragm relaxes into an upward position, the ribs expand outward, the space increases, and air rushes into the lungs to fill the space.
  5. none of the above
Grade 8 Respiration, Digestion, and Excretion
Which statement describes what happens when you breathe in?
  1. The diaphragm relaxes into an upward position, the ribs settle downward, the space shrinks, and air is forced out of the lungs.
  2. The diaphragm contracts and drops down, the ribs expand outward, the space shrinks, and air is forced out of the lungs.
  3. The diaphragm contracts and drops down, the ribs expand outward, the space increases, and air rushes into the lungs to fill the space.
  4. The diaphragm relaxes into an upward position, the ribs expand outward, the space increases, and air rushes into the lungs to fill the space.
  5. none of the above
Grade 8 Respiration, Digestion, and Excretion
What is amylase?
  1. protein in saliva
  2. starch found in plants
  3. molecule with a central carbon atom
  4. type of flower
Grade 8 Respiration, Digestion, and Excretion
What is the function of the trachea? (Select all that apply.)
  1. voice box
  2. for air to pass through to the bronchioles
  3. where food passes
  4. carbon dioxide exits here
Grade 8 Respiration, Digestion, and Excretion
What vitamin comes from citrus fruits and helps fight infection?
  1. vitamin K
  2. vitamin D
  3. vitamin E
  4. vitamin C
Grade 8 Respiration, Digestion, and Excretion
What is the function of the sinuses?
  1. divide incoming oxygen into the left and right lungs
  2. warm and moisten air before entering lungs
  3. filter bacteria from entering the lungs
  4. strengthen the diaphragm
Grade 8 Respiration, Digestion, and Excretion
The membrane on the surface of the lungs is the
  1. epidermis.
  2. sagittal plane.
  3. visceral pleura.
  4. cell membrane.
Grade 8 Respiration, Digestion, and Excretion
Alveoli are made of
  1. cartilage.
  2. strong muscle.
  3. thin membranes.
  4. tubes.
Grade 8 Respiration, Digestion, and Excretion
Villi allow nutrients to move from the large intestine into the blood.
  1. True
  2. False
Grade 8 Respiration, Digestion, and Excretion
What percentage of the air we inhale is actually oxygen?
  1. 100%
  2. 78%
  3. 21%
  4. 16%
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