Standardized Test Prep

Multiple Choice

1. Which of the following is NOT a kind of tissue in the human body?

   1. epithelial

   2. connective

   3. interstitial

   4. nervous

2. Each of the following aids in the process of digestion EXCEPT the

   1. teeth.

   2. saliva.

   3. stomach.

   4. kidney.

3. In the human body, hydrochloric acid is responsible for the low pH of the contents of the

   1. kidney.

   2. gallbladder.

   3. stomach.

   4. liver.

4. Which is NOT a function of the kidneys?

   1. removal of waste products from the blood

   2. maintenance of blood pH

   3. regulation of water content of the blood

   4. excretion of carbon dioxide

5. The main function of the digestive system is to

   1. break down large molecules into smaller molecules.

   2. excrete oxygen and carbon dioxide.

   3. synthesize minerals and vitamins needed for a healthy body.

   4. remove waste products from the blood.

6. In the kidneys, both useful substances and wastes are removed from the blood by

   1. reabsorption.

   2. excretion.

   3. dialysis.

   4. filtration.

7. Which of the following is NOT a role of fats in the body?

   1. Deposits of fat act as insulation.

   2. They are components of cell membranes.

   3. They help with absorption of fat-soluble vitamins.

   4. They are hormones and enzymes.

Questions 8–9

A student is studying the effect of temperature on the action of an enzyme in stomach fluid. The enzyme digests protein. An investigation was set up using five identical test tubes. Each tube contained 40 mL of stomach fluid and 20 mm of glass tubing filled with gelatin. Each tube was subjected to a different temperature. After 48 hours, the amount of gelatin digested in each tube was measured in millimeters. The results for the five test tubes are shown in the table.

d

8. Which is the manipulated (independent) variable in this investigation?

   1. gastric fluid

   2. length of glass tubing

   3. temperature

   4. time

9. Another test tube was set up that was identical to the other test tubes and placed at a temperature of 15°C for 48 hours. What amount of digestion would you expect to occur in this test tube?

   1. less than 3.0 mm

   2. between 3.0 mm and 4.5 mm

   3. between 4.5 mm and 8.0 mm

   4. more than 8.0 mm

Open-Ended Question

10. Fad diets that boast of rapid weight loss often become popular. Many of these diets involve eating only a limited variety of foods. Explain why these diets are an unhealthful way to lose weight.

Table of Contents