Question 1

The general term that describes the uptake of oxygen from the environment and the disposal of carbon dioxide at the body system level is

Accepted Answer

A) respiration. 
B) diffusion. 
C) exhalation. 
D) cellular respiration. 
A) respiration. 
B) diffusion. 
C) exhalation. 
D) cellular respiration.

Question 2

Protruding papulae on the surface of echinoderms improve respiratory efficiency by ______.

Accepted Answer

A) increasing the concentration difference 
B) increasing the surface area for diffusion 
C) decreasing the distance for diffusion 
D) changing the diffusion constant 
A) increasing the concentration difference 
B) increasing the surface area for diffusion 
C) decreasing the distance for diffusion 
D) changing the diffusion constant

Question 3

Tom is choking on a piece of steak that is stuck in his trachea, and he signals for his young son to call 911.It takes the paramedics four minutes to reach his house.Will this be in time to save Tom (and why), or will Tom already be dead (and why)?

Accepted Answer

A) Tom will be alive since the myoglobin in his muscles will release oxygen into the blood after he stops breathing. 
B) Tom will be dead due to the lowered pH of his blood. 
C) Tom will be dead since all the hemoglobin in his arterial blood will unload its oxygen during the first pass through the tissues after his last breath. 
D) Tom will be alive since he had a reserve of about three-quarters of his hemoglobin still bound to oxygen when he started choking. 
A) Tom will be alive since the myoglobin in his muscles will release oxygen into the blood after he stops breathing. 
B) Tom will be dead due to the lowered pH of his blood. 
C) Tom will be dead since all the hemoglobin in his arterial blood will unload its oxygen during the first pass through the tissues after his last breath. 
D) Tom will be alive since he had a reserve of about three-quarters of his hemoglobin still bound to oxygen when he started choking.

Question 4

Which part of a hemoglobin molecule binds to a molecule of O2?

Accepted Answer

A) the hydrophobic pocket between two $\alpha$ chains 
B) the copper atom wedged between an $\alpha$ and a $\beta$ globin chain 
C) the iron atom in the center of a heme group 
D) the surface of a $\beta$globin chain 
A) the hydrophobic pocket between two $\alpha$ chains 
B) the copper atom wedged between an $\alpha$ and a $\beta$ globin chain 
C) the iron atom in the center of a heme group 
D) the surface of a $\beta$globin chain

Question 5

Which dissolved gas cannot be transported by hemoglobin?

Accepted Answer

A) oxygen (O2) 
B) nitrogen (N2) 
C) nitric acid (NO) 
D) carbon monoxide (CO) 
A) oxygen (O2) 
B) nitrogen (N2) 
C) nitric acid (NO) 
D) carbon monoxide (CO)

Question 6

The close proximity of capillaries to the alveoli in lungs improve respiratory efficiency by ______.

Accepted Answer

A) decreasing the distance for diffusion 
B) changing the diffusion constant 
C) increasing the concentration difference 
D) increasing the surface area for diffusion 
A) decreasing the distance for diffusion 
B) changing the diffusion constant 
C) increasing the concentration difference 
D) increasing the surface area for diffusion

Question 7

Fish and crustaceans are similar in that both use _____________ for gas exchange.

Accepted Answer

A) tracheal tubes 
B) gills 
C) the walls of the mantle cavity 
D) the moist surface of their skin 
A) tracheal tubes 
B) gills 
C) the walls of the mantle cavity 
D) the moist surface of their skin

Question 8

One possible reason that there are not any really large insects currently living on Earth is that

Accepted Answer

A) gas exchange across their moist skin surfaces cannot support the metabolic needs of a large body. 
B) they do not have as many papulae as echinoderms. 
C) their gills do not have as many lamellae as fish gills. 
D) the bulk flow of air through their tracheal tubes would be more difficult the larger the body and longer the tracheal tubes. 
A) gas exchange across their moist skin surfaces cannot support the metabolic needs of a large body. 
B) they do not have as many papulae as echinoderms. 
C) their gills do not have as many lamellae as fish gills. 
D) the bulk flow of air through their tracheal tubes would be more difficult the larger the body and longer the tracheal tubes.

Exam 48: The Respiratory System

The general term that describes the uptake of oxygen from the environment and the disposal of carbon dioxide at the body system level is

Protruding papulae on the surface of echinoderms improve respiratory efficiency by ______.

Tom is choking on a piece of steak that is stuck in his trachea, and he signals for his young son to call 911.It takes the paramedics four minutes to reach his house.Will this be in time to save Tom (and why), or will Tom already be dead (and why)?

Which part of a hemoglobin molecule binds to a molecule of O2?

Which dissolved gas cannot be transported by hemoglobin?

The close proximity of capillaries to the alveoli in lungs improve respiratory efficiency by ______.

Fish and crustaceans are similar in that both use _____________ for gas exchange.

One possible reason that there are not any really large insects currently living on Earth is that

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Which part of a hemoglobin molecule binds to a molecule of O₂?