Skip to main content
United States
Jump To
Support
Register or Log In
Support
Register or Log In
Instructors
Browse Products
Getting Started
Students
Browse Products
Getting Started
Chapter 24 Quiz
Return to Animal Physiology 4e Student Resources
Chapter 24 Quiz
Quiz Content
*
not completed
.
Which statement regarding hemoglobin is
false
?
Its affinity for O
2
can change.
correct
incorrect
It is primarily an enzyme.
correct
incorrect
It binds to O
2
via weak, noncovalent bonds.
correct
incorrect
It is a buffer.
correct
incorrect
*
not completed
.
How many molecules of O
2
does a molecule of vertebrate blood hemoglobin normally bind?
1
correct
incorrect
2
correct
incorrect
4
correct
incorrect
8
correct
incorrect
*
not completed
.
Which respiratory pigment contains copper at the O
2
binding site?
Myoglobin
correct
incorrect
Chlorocruorin
correct
incorrect
Hemerythrin
correct
incorrect
Hemocyanin
correct
incorrect
*
not completed
.
Which statement about the four chemical classes of respiratory pigments is true?
All are metalloproteins.
correct
incorrect
All bind reversibly with O
2
at specific O
2
-binding sites associated with metal ions.
correct
incorrect
All share the same heme structure.
correct
incorrect
All are metalloproteins and bind reversibly with O
2
at specific O
2
-binding sites associated with metal ions.
correct
incorrect
*
not completed
.
In people at rest, the approximate O
2
saturation of venous blood leaving the tissues is
75%.
correct
incorrect
5 ml O
2
/100 ml blood.
correct
incorrect
10 ml O
2
/100 ml blood.
correct
incorrect
5%.
correct
incorrect
*
not completed
.
During exercise, the body supplies O
2
to the muscles by
increasing muscle fiber declination.
correct
incorrect
increasing blood flow.
correct
incorrect
increasing blood flow and unloading more O
2
to tissues from hemoglobin.
correct
incorrect
increasing muscle fiber declination, increasing blood flow, and unloading more O
2
to tissues from hemoglobin.
correct
incorrect
*
not completed
.
The extent of O
2
-binding site cooperativity is expressed using a mathematical index called the
Bohr effect.
correct
incorrect
Root index.
correct
incorrect
Haldane constant.
correct
incorrect
Hill coefficient.
correct
incorrect
*
not completed
.
Which word best describes the mechanism for the steep portion of the oxygen dissociation curve?
Cooperativity
correct
incorrect
Loading
correct
incorrect
Unloading
correct
incorrect
Coefficient
correct
incorrect
*
not completed
.
The process by which low pH aids in the decreasing affinity of hemoglobin for O
2
is called the _______ effect.
Bohr
correct
incorrect
Root
correct
incorrect
Haldane
correct
incorrect
hemoglobin-shift
correct
incorrect
*
not completed
.
Which statement about the Bohr effect is true?
A higher temperature decreases the Hb–O
2
affinity.
correct
incorrect
A lower pH increases the Hb–O
2
affinity.
correct
incorrect
A higher partial pressure of CO
2
decreases the Hb–O
2
affinity.
correct
incorrect
A higher H
+
concentration increases the Hb–O
2
affinity.
correct
incorrect
*
not completed
.
Which variable does
not
affect the properties of the O
2
dissociation curve?
Temperature
correct
incorrect
Partial pressure of CO
2
correct
incorrect
2,3-DPG concentration
correct
incorrect
Cardiac output
correct
incorrect
*
not completed
.
Which hemoglobin has the highest
P
50
?
Hemoglobin at a lower-than-normal temperature, such as 35°C
correct
incorrect
Fetal hemoglobin
correct
incorrect
Hemoglobin in a human residing at a high altitude for three weeks
correct
incorrect
Hemoglobin at a higher-than-normal pH, such as 7.6
correct
incorrect
*
not completed
.
A reduction in the amount of O
2
bound to hemoglobin at saturation could be the result of the _______ effect.
Bohr
correct
incorrect
fixed-acid Bohr
correct
incorrect
Root
correct
incorrect
Haldane
correct
incorrect
*
not completed
.
During chronic exposure to high altitude, increased 2,3-DPG
increases hemoglobin–O
2
affinity.
correct
incorrect
increases the unloading of O
2
at tissues.
correct
incorrect
permits increased physical exercise.
correct
incorrect
increases the loading of O
2
at the lungs.
correct
incorrect
*
not completed
.
During exercise, squids and octopuses meet their O
2
demand by
drawing additional O
2
from venous reserve.
correct
incorrect
increasing their circulation rate.
correct
incorrect
increasing the affinity of hemoglobin for O
2
.
correct
incorrect
decreasing the affinity of hemoglobin for O
2
.
correct
incorrect
*
not completed
.
In general, what is the relationship between primate size and Hb–O
2
affinity?
Larger primates tend to have a lower Hb–O
2
affinity.
correct
incorrect
Smaller primates tend to have a lower
P
50
.
correct
incorrect
Larger primates tend to have a higher
P
50
.
correct
incorrect
Smaller primates tend to have a lower Hb–O
2
affinity.
correct
incorrect
*
not completed
.
Compared to oxygenated blood, fully deoxygenated blood has a
higher affinity for CO
2
.
correct
incorrect
lower affinity for CO
2
.
correct
incorrect
higher affinity for bicarbonate.
correct
incorrect
lower affinity for O
2
.
correct
incorrect
*
not completed
.
Bicarbonate created from CO
2
in the red blood cell gets into the plasma
through exclusive bicarbonate channels.
correct
incorrect
via chloride exchange.
correct
incorrect
with the assistance of carbonic anhydrase, which shuttles it into the plasma.
correct
incorrect
via active transport in exchange for Na
+
.
correct
incorrect
*
not completed
.
Which of the following is(are) involved in the transport of CO
2
from the tissues to the lungs?
Bicarbonate
correct
incorrect
Bicarbonate and CO
2
bound to hemoglobin
correct
incorrect
CO
2
bound to hemoglobin and CO
2
dissolved in plasma
correct
incorrect
Bicarbonate, CO
2
bound to hemoglobin, and CO
2
dissolved in plasma
correct
incorrect
*
not completed
.
According to the _______, changes in pH are a means by which ectotherms maintain a constant state of electrical charge on protein molecules.
Root effect
correct
incorrect
Bohr shift
correct
incorrect
alphastat hypothesis
correct
incorrect
law of buffered reactions
correct
incorrect
Previous Question
Submit Quiz
Next Question
Reset
Exit Quiz
Review all Questions
Submit Quiz
Are you sure?
You have some unanswered questions. Do you really want to submit?
Back to top
Printed from , all rights reserved. © Oxford University Press, 2024
Select your Country