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Ninth Grade (Grade 9) Respiration, Digestion, and Excretion Questions

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Grade 9 Respiration, Digestion, and Excretion
What are the special functional units of the kidneys?
  1. neurons
  2. villi
  3. nephrons
  4. white blood cells
Grade 9 Respiration, Digestion, and Excretion
How can one prevent emphysema, a well-known lung disease?
  1. by maintaining a healthy diet
  2. by exercising consistently
  3. by abstaining from smoking
  4. by taking vitamins
Grade 9 Respiration, Digestion, and Excretion
The last section of the colon, which is responsible for elimination, is the
  1. jejunum.
  2. descending colon.
  3. ascending colon.
  4. rectum.
Grade 9 Respiration, Digestion, and Excretion
The large intestine
  1. absorbs and eliminates blood.
  2. is located between the small intestine and the anus.
  3. is a long narrow tube about 6 meters long.
  4. Both a and b are correct.
Grade 9 Respiration, Digestion, and Excretion
What is exhaled during breathing?
  1. carbon monoxide
  2. carbon dioxide
  3. oxygen
  4. nitrogen
Grade 9 Respiration, Digestion, and Excretion
The function of the excretory system is to help maintain homeostasis by
  1. removing wastes.
  2. absorbing nutrients.
  3. preventing infection.
  4. breaking down nutrients.
Grade 9 Respiration, Digestion, and Excretion
When a human inhales, the air pressure in the chest cavity
  1. remains the same, allowing both pressures to be equal.
  2. increases, allowing the lungs to expand.
  3. decreases, allowing outside air to flow into the lungs.
  4. does not change, as there is no air pressure in the cavity.
Grade 9 Respiration, Digestion, and Excretion
Which organ is approximately two meters in length and pushes solid wastes out of the human body?
  1. muscles
  2. small intestine
  3. large intestine
  4. bladder
Grade 9 Respiration, Digestion, and Excretion
What process gets rid of liquid and gaseous waste products?
  1. synthesis
  2. reproduction
  3. excretion
  4. metabolism
Grade 9 Respiration, Digestion, and Excretion
What is the function of the anus?
  1. to get rid of all the fats in your body
  2. to help control the sugar levels on your body
  3. to absorb water and eliminate waste
  4. to release solid waste (feces) from the body
Grade 9 Respiration, Digestion, and Excretion
The function of the larynx is to
  1. allow food to enter.
  2. exchange oxygen for carbon dioxide.
  3. warm and moisten air before entering the lungs.
  4. produce sound.
Grade 9 Respiration, Digestion, and Excretion
Which set of letters in the diagram shows structures of the upper respiratory tract?
Respiratory System
  1. A, B, C
  2. B, C, D
  3. C, D, E
  4. D, E, J
Grade 9 Respiration, Digestion, and Excretion
Water is extracted from digested food in the body primarily by the
  1. bladder.
  2. gallbladder.
  3. large intestine.
  4. pancreas.
Grade 9 Respiration, Digestion, and Excretion
The muscular tube that links the stomach and the mouth is the
  1. epiglottis.
  2. esophagus.
  3. trachea.
  4. larynx.
Grade 9 Respiration, Digestion, and Excretion
Bile is released from the
  1. heart.
  2. liver.
  3. pancreas.
  4. large intestine.
  5. small intestine.
Grade 9 Respiration, Digestion, and Excretion
The ability of the dragons to consume 20 pounds of fish demonstrates which characteristic of life?
  1. metabolism
  2. reproduction
  3. homeostasis
  4. growth
Grade 9 Respiration, Digestion, and Excretion
Which set of letters in the diagram shows structures of the lower respiratory tract?
Respiratory System
  1. A, B, C
  2. B, C, D
  3. C, D, E
  4. D, E, J
Grade 9 Respiration, Digestion, and Excretion
What is the gallbladder's role in the body?
  1. storing fat
  2. storing bile
  3. creating fat
  4. producing bile
Grade 9 Respiration, Digestion, and Excretion
Carbon dioxide diffuses from the
  1. alveoli to the capillaries.
  2. capillaries to the alveoli.
  3. capillaries to the veins.
  4. venules to the bronchi.
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