14. Phagocytic white blood cells digest many of the invasive bacteria that gain entry into the
human body. How could a bacterial cell enter a white blood cell in order to be digested’
a. endocytosis
b. facilitated diffusion
c. exocytosis
d. active transport

15. Water can enter cells via either passive transport or
a. facilitated diffusion.
b. by attaching to large, charged molecules.
c. exocytosis.
d. aquaporins.

16. The following nutritional information compares a bag of Potato Chips and a bag of SunChips.
Which of these snacks is healthier and why’
Potato Chips SunChips
Serving size 1 oz 1 oz
Calories 150 140
Saturated fat 2 g 1 g
Trans fat 0 g 0 g
Cholesterol 0 mg 0 mg
Fiber 1 g 2 g
Sugars 1 g 2 g
Protein 2 g 2 g
Potato Chips main ingredients: Potatoes, vegetable oil, salt, sugar
SunChips main ingredients: Whole corn, vegetable oil, whole wheat, rice flour, whole oat flour
a. The Potato Chips are healthier because they contain more Calories, more saturated fat,
and less fiber.
b. The Potato Chips are healthier because they contain fewer Calories, less saturated fat,
more fiber, and are made from whole grains.
c. The SunChips are healthier because they contain fewer Calories, less saturated fat, more
fiber, and are made from whole grains.
d. The SunChips are healthier because they contain more Calories, more saturated fat, and
less fiber.

17. Shannon has considered herself an extremely healthy person for most of her life. She is a
marathon runner and watches her diet very carefully. She has 8% body fat, weighs 105
pounds, and is 5 foot 10 inches tall. Shannon might not actually be as healthy as she thinks
because she
a. doesn’t have enough body fat for menstruation or pregnancy.
b. likely has metabolic problems associated with high blood pressure.
c. is overweight for her height.
d. doesn’t consume enough nutrients for normal bodily functions.

18. Which of the following is not evidence of global warming’
a. There are fewer glaciers in Glacier National Park today than there were 150 years ago.
b. Some cold-adapted animals are moving farther north (away from the equator) each year.
c. In New England, maple syrup season now occurs in the late fall rather than in the early
spring.
d. Sea levels rose and ocean volumes grew in the twentieth century.

19. The greenhouse effect is most similar to
a. growing plants in your office to reduce indoor air pollution.
b. warming the air for a hot-air balloon with a propane burner.
c. heating up the air inside a car by parking it in the sun.
d. burning kerosene in a heater to warm up the air inside a cold house.
e. cooking food with a charcoal grill.