Chapter 08: The Respiratory System

Chapter 08: The Respiratory System

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below

 

MULTIPLE CHOICE

 

1. What is the primary purpose of the respiratory system?

a.	continuous absorption of oxygen and excretion of carbon dioxide
b.	filtering to prevent allergens and microbes from reaching the lungs
c.	transport oxygenated blood to the tissues
d.	warm and humidify inspired gas

 

 

ANS:  A

The respiratory system’s primary function is the continuous absorption of oxygen and the excretion of carbon dioxide.

 

DIF:    Application    REF:   p. 148            OBJ:   1

 

2. What is meant by “internal respiration”?

a.	any gas exchange that occurs inside the body
b.	consumption of oxygen in the mitochondria
c.	continuous absorption of oxygen and excretion of carbon dioxide
d.	exchange of gases between the blood and the tissue

 

 

ANS:  D

This process supports internal respiration, which is the exchange of gases between blood and tissues.

 

DIF:    Application    REF:   p. 148            OBJ:   1

 

3. By what mechanism does gas exchange across the lung occur?

a.	active transport
b.	facilitated diffusion
c.	facilitated transport
d.	simple diffusion

 

 

ANS:  D

This close “match” of gas and blood across a large but extremely thin blood-gas barrier membrane enables efficient gas exchange to occur by simple diffusion.

 

DIF:    Application    REF:   p. 148            OBJ:   1

 

4. The human genome contains _____ pairs of chromosomes.

a.	16
b.	23
c.	46
d.	50

 

 

ANS:  B

DNA is organized into 23 pairs of supercoiled masses that are called chromosomes.

 

DIF:    Recall             REF:   p. 150            OBJ:   2

 

5. Which chromosome has been found to carry the defective gene responsible for the development of cystic fibrosis?

a.	1
b.	7
c.	15
d.	23

 

 

ANS:  B

The defective gene that is responsible for defective CFTR is located on chromosome 7 in the q31.2 region and has been found to be mutable in more than 1500 different ways.

 

DIF:    Recall             REF:   p. 191            OBJ:   2