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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 many tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide takes place?
  1. alveoli
  2. trachea
  3. bronchial tube
Grade 9 Respiration, Digestion, and Excretion
What does bile do?
  1. produces fats
  2. breaks down fats
  3. produces glucose
  4. breaks down proteins
Grade 9 Respiration, Digestion, and Excretion
Water is lost from the body by each process EXCEPT
  1. digestion.
  2. respiration.
  3. sweating.
  4. urinating.
Grade 9 Respiration, Digestion, and Excretion
Where is the appendix in the abdomen of the human body?
  1. left upper quadrant
  2. right upper quadrant
  3. right lower quadrant
  4. left lower quadrant
Grade 9 Respiration, Digestion, and Excretion
When swallowing, the                   blocks the trachea so that the bolus enters the esophagus.
  1. cartilage
  2. epiglottis
  3. glottis
  4. pyloric sphincter
Grade 9 Respiration, Digestion, and Excretion
Which organ helps taste bitter, sweet, sour, and salty sensations?
  1. tongue
  2. liver
  3. stomach
  4. kidney
Grade 9 Respiration, Digestion, and Excretion
What chemicals are present in the stomach?
  1. bile
  2. saliva
  3. gastric juices
  4. carbohydrates
Grade 9 Respiration, Digestion, and Excretion
What does the pancreas do?
  1. It has no function.
  2. It helps regulate blood temperature.
  3. It helps the small intestine digest food.
  4. It helps food pass through the large intestine faster.
Grade 9 Respiration, Digestion, and Excretion
A cell is said to be fully turgid when it cannot absorb any more water or when turgor pressure is maximum. The best simile of turgor pressure would be
  1. when an in-ground swimming pool is installed.
  2. when your stomach is mixing up digested food.
  3. when your bladder is full and cannot hold anymore urine.
  4. when one of your kidneys stop working properly.
Grade 9 Respiration, Digestion, and Excretion
Each kidney consists of hundreds of thousands of long tubules called
  1. arteries.
  2. nephrons.
  3. neurons.
  4. veins.
Grade 9 Respiration, Digestion, and Excretion
Projections that protrude and extend into the small intestine are known as
  1. villi.
  2. vents.
  3. venus.
  4. villages.
Grade 9 Respiration, Digestion, and Excretion
Finger-like bumps in the small intestine are
  1. plasma.
  2. platelets.
  3. tissue.
  4. villi.
Grade 9 Respiration, Digestion, and Excretion
In the human body, the exchange and transport of gases occur as a function of the
  1. lungs only.
  2. blood vessels and lungs.
  3. ganglia.
  4. phloem tubes.
Grade 9 Respiration, Digestion, and Excretion
Where does the process of chemical digestion begin?
  1. esophagus
  2. mouth
  3. small intestine
  4. stomach
Grade 9 Respiration, Digestion, and Excretion
The protein hemoglobin of the red blood cell carries                 throughout the body.
  1. carbon dioxide
  2. oxygen
  3. hydrogen
  4. water
Grade 9 Respiration, Digestion, and Excretion
Villi are tiny projections that absorb nutrients from food. They are found in the
  1. arteries.
  2. esophagus.
  3. small intestine.
  4. stomach.
Grade 9 Respiration, Digestion, and Excretion
What organ has the main function of reabsorbing water?
  1. spleen
  2. pancreas
  3. large intestine
  4. small instestine
Grade 9 Respiration, Digestion, and Excretion
How does the liver help the small intestine?
  1. The liver absorbs water particles.
  2. The liver produces bile, which helps break down fats.
  3. The liver produces enzymes, which help break down proteins.
  4. All of the above
Grade 9 Respiration, Digestion, and Excretion
During normal function, food moves from the stomach into the
  1. appendix.
  2. duodenum.
  3. esophagus.
  4. large intestine.
Grade 9 Respiration, Digestion, and Excretion
What triggers the production of saliva? Select all that apply.
  1. glands in the mouth
  2. taste buds on the tongue
  3. smell or thought of food
  4. chewing on food
  5. production of adrenaline
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