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Author Quiz
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1

Oxygen
A)enters the blood by diffusion.
B)binds to hemoglobin molecules.
C)passes through capillary walls.
D)All of the above are correct.
2

Dietary Reference Intakes
A)are measured in calories.
B)are estimates of quantities of nutrients needed daily.
C)assure that everyone will have good nutrition.
D)None of the above is correct.
3

What do the lungs, kidneys, and small intestine have in common? They
A)are made up of muscle.
B)receive blood from the aorta.
C)have a large surface area.
D)remove materials from the blood.
4

Capillaries
A)are the smallest blood vessels.
B)carry blood.
C)are the sites where exchange of molecules takes place between the blood and other organs.
D)All of the above are true.
5

A nerve impulse
A)travels at the speed of light.
B)is an electric current.
C)involves the movement of ions across the nerve cell membrane.
D)All of these answers are true.
6

Which of the following is typical of an endocrine gland? It
A)secretes into a duct.
B)produces enzymes for digestion.
C)usually secretes its products into the circulatory system.
D)increases the metabolic rate.
7

Vitamins
A)are responsible for providing energy.
B)are the same as minerals.
C)cannot be manufactured by the human body.
D)are amino acids.
8

The primary function of the blood is to
A)protect you from disease.
B)carry materials.
C)provide heat.
D)increase metabolism.
9

The sense of touch
A)is evenly distributed over the surface of the body.
B)consists of very few receptor cells in very specific places, like the tips of the fingers.
C)is relatively unimportant.
D)includes pressure, temperature, and pain receptors.
10

The primary function of carbohydrates in the diet is to
A)provide building blocks for the cell wall.
B)provide energy.
C)provide amino acids.
D)make you feel full.





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