Question 1

When oxygen binds with hemoglobin, why is this not oxidation?

Accepted Answer

A)  When oxygen binds with hemoglobin, it is a full reduction reaction. 
B)  When oxygen binds with hemoglobin, there is no oxidation, only oxygenation. 
C)  Although electrons are partially transferred from iron atoms to oxygen, the transfer is not complete. 
D)  Although electrons are partially transferred from oxygen atoms to iron, the transfer is not complete. 
A)  When oxygen binds with hemoglobin, it is a full reduction reaction. 
B)  When oxygen binds with hemoglobin, there is no oxidation, only oxygenation. 
C)  Although electrons are partially transferred from iron atoms to oxygen, the transfer is not complete. 
D)  Although electrons are partially transferred from oxygen atoms to iron, the transfer is not complete.

Question 2

Refer to the figure shown.
  The curve on the graph

Accepted Answer

A)  represents oxygen delivery by human blood at rest and during vigorous exercise. 
B)  is a vertebrate oxygen dissociation curve. 
C)  is a mammalian oxygen dissociation curve. 
D)  represents the increase in oxygen concentration as blood travels to the lungs. 
A)  represents oxygen delivery by human blood at rest and during vigorous exercise. 
B)  is a vertebrate oxygen dissociation curve. 
C)  is a mammalian oxygen dissociation curve. 
D)  represents the increase in oxygen concentration as blood travels to the lungs.

Question 3

In what way can hemoglobin be considered an "honorary enzyme"?

Accepted Answer

Respiratory pigments have been dubbed "h

Question 4

Refer to the figure.
  The figure shown shows that a reduction in O2 affinity

Accepted Answer

A)  impairs O2 unloading less than it enhances loading. 
B)  impairs O2 unloading more than it enhances loading. 
C)  enhances O2 unloading more than it impairs loading. 
D)  enhances O2 unloading less than it impairs loading. 
A)  impairs O2 unloading less than it enhances loading. 
B)  impairs O2 unloading more than it enhances loading. 
C)  enhances O2 unloading more than it impairs loading. 
D)  enhances O2 unloading less than it impairs loading.

Question 5

_______ binds to hemoglobin at the allosteric site and _______.

Accepted Answer

A)  O2; increases the affinity of hemoglobin for O2 
B)  CO2; increases the affinity of hemoglobin for O2 
C)  CO2; decreases the affinity of hemoglobin for O2 
D)  O2; decreases the affinity of hemoglobin for O2 
A)  O2; increases the affinity of hemoglobin for O2 
B)  CO2; increases the affinity of hemoglobin for O2 
C)  CO2; decreases the affinity of hemoglobin for O2 
D)  O2; decreases the affinity of hemoglobin for O2

Question 6

Select the correct two functions of myoglobin.

Accepted Answer

A)  Increase the rate of O2 diffusion through the mitochondria; CO2 buffering 
B)  Increase the rate of O2 diffusion through cytoplasm; CO2 buffering 
C)  Increase the rate of O2 diffusion through the mitochondria; O2 storage 
D)  Increase the rate of O2 diffusion through cytoplasm; O2 storage 
A)  Increase the rate of O2 diffusion through the mitochondria; CO2 buffering 
B)  Increase the rate of O2 diffusion through cytoplasm; CO2 buffering 
C)  Increase the rate of O2 diffusion through the mitochondria; O2 storage 
D)  Increase the rate of O2 diffusion through cytoplasm; O2 storage

Question 7

If HCO3- is retained in the body, it binds with _______ and causes the body fluids to become more _______.

Accepted Answer

A)  H+ ; acidic 
B)  H+ ; alkaline 
C)  CO2 ; acidic 
D)  CO2 ; alkaline 
A)  H+ ; acidic 
B)  H+ ; alkaline 
C)  CO2 ; acidic 
D)  CO2 ; alkaline

Question 8

In octopuses, venous saturation is about _______% at rest and about _______% during exercise.

Accepted Answer

A)  75; 25 
B)  30; 30 
C)  30; 10 
D)  10; 10 
A)  75; 25 
B)  30; 30 
C)  30; 10 
D)  10; 10

Question 9

When the body detects _______, _______ is secreted to increase the production of red blood cells.

Accepted Answer

A)  high CO2 levels; erythropoietin 
B)  high CO2 levels; myoglobin 
C)  low O2 levels; erythropoietin 
D)  low O2 levels; myoglobin 
A)  high CO2 levels; erythropoietin 
B)  high CO2 levels; myoglobin 
C)  low O2 levels; erythropoietin 
D)  low O2 levels; myoglobin

Question 10

Refer to the figure shown.
  Which oxygen dissociation curve in the figure would represent a diving mammal such as a Weddell seal?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
A)  I 
B)  II 
C)  III 
D)  IV

Question 11

Refer to the figure shown.
  On the graph, which oxygen dissociation curve represents a very high blood pH (e.g., 7.6)?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
A)  I 
B)  II 
C)  III 
D)  IV

Question 12

Hemocyanins occur in which animal groups?

Accepted Answer

A)  Molluscs 
B)  Arthropods 
C)  Echinoderms and molluscs 
D)  Molluscs and arthropods 
A)  Molluscs 
B)  Arthropods 
C)  Echinoderms and molluscs 
D)  Molluscs and arthropods

Question 13

In many cases, lowland people who travel to an area of high altitude for an extended period of time will develop a condition known as

Accepted Answer

A)  polycythemia. 
B)  anemia. 
C)  bradycardia. 
D)  hypotension. 
A)  polycythemia. 
B)  anemia. 
C)  bradycardia. 
D)  hypotension.

Question 14

Which statement about respiratory pigments is false?

Accepted Answer

A)  They serve as major buffers of blood pH. 
B)  They play critical roles in CO2 transport. 
C)  They play critical roles in the transport of nutrients. 
D)  They can function as O2 stores in invertebrates. 
A)  They serve as major buffers of blood pH. 
B)  They play critical roles in CO2 transport. 
C)  They play critical roles in the transport of nutrients. 
D)  They can function as O2 stores in invertebrates.

Question 15

What determines the shape of the CO2 dissociation curve?

Accepted Answer

All three kinds of CO₂ being transported-

Question 16

Which statement comparing human adult and fetal hemoglobin is true?

Accepted Answer

A)  Fetal hemoglobin contains one particular subunit that lowers its P50. 
B)  Fetal hemoglobin contains one particular subunit that raises its P50. 
C)  All subunits of fetal hemoglobin are different and result in a lower P50. 
D)  All subunits of fetal hemoglobin are different and result in a higher P50. 
A)  Fetal hemoglobin contains one particular subunit that lowers its P50. 
B)  Fetal hemoglobin contains one particular subunit that raises its P50. 
C)  All subunits of fetal hemoglobin are different and result in a lower P50. 
D)  All subunits of fetal hemoglobin are different and result in a higher P50.

Question 17

The venous blood displays a reduced O2 affinity compared to arterial blood because its

Accepted Answer

A)  CO2 partial pressure is higher. 
B)  H+ concentration is higher. 
C)  hemoglobin concentration is lower. 
D)  CO2 partial pressure is higher and its H+ concentration is higher. 
A)  CO2 partial pressure is higher. 
B)  H+ concentration is higher. 
C)  hemoglobin concentration is lower. 
D)  CO2 partial pressure is higher and its H+ concentration is higher.

Question 18

Explain the significance of measurements of mixed venous O2 partial pressure.

Accepted Answer

Mixed venous O₂ partial pressure represen

Question 19

A respiratory pigment that requires a relatively low O2 partial pressure for loading has _______ affinity for O2.

Accepted Answer

A)  a low 
B)  a high 
C)  no 
D)  a variable 
A)  a low 
B)  a high 
C)  no 
D)  a variable

Question 20

Refer to the figure shown.
  Region I in the figure represents the

Accepted Answer

A)  amount of oxygen used by the tissues at rest. 
B)  oxygen concentration of blood in the tissues during exercise. 
C)  oxygen concentration of blood in the tissues at rest. 
D)  amount of oxygen used by the tissues during exercise. 
A)  amount of oxygen used by the tissues at rest. 
B)  oxygen concentration of blood in the tissues during exercise. 
C)  oxygen concentration of blood in the tissues at rest. 
D)  amount of oxygen used by the tissues during exercise.

Exam 24: Transport of Oxygen and Carbon Dioxide in Body Fluids With an Introduction to Acid- Base Physiology

When oxygen binds with hemoglobin, why is this not oxidation?

Refer to the figure shown. The curve on the graph

In what way can hemoglobin be considered an "honorary enzyme"?

Refer to the figure. The figure shown shows that a reduction in O2 affinity

_______ binds to hemoglobin at the allosteric site and _______.

Select the correct two functions of myoglobin.

If HCO3- is retained in the body, it binds with _______ and causes the body fluids to become more _______.

In octopuses, venous saturation is about _______% at rest and about _______% during exercise.

When the body detects _______, _______ is secreted to increase the production of red blood cells.

Refer to the figure shown. Which oxygen dissociation curve in the figure would represent a diving mammal such as a Weddell seal?

Refer to the figure shown. On the graph, which oxygen dissociation curve represents a very high blood pH (e.g., 7.6)?

Hemocyanins occur in which animal groups?

In many cases, lowland people who travel to an area of high altitude for an extended period of time will develop a condition known as

Which statement about respiratory pigments is false?

What determines the shape of the CO2 dissociation curve?

Which statement comparing human adult and fetal hemoglobin is true?

The venous blood displays a reduced O2 affinity compared to arterial blood because its

Explain the significance of measurements of mixed venous O2 partial pressure.

A respiratory pigment that requires a relatively low O2 partial pressure for loading has _______ affinity for O2.

Refer to the figure shown. Region I in the figure represents the

Animals and Environments: Function on the Ecological Stage

Molecules and Cells in Animal Physiology

Genomics, Proteomics, and Related Approaches to Physiology

Physiological Development and Epigenetics

Transport of Solutes and Water

Nutrition, Feeding, and Digestion

Energy Metabolism

Aerobic and Anaerobic Forms of Metabolism

The Energetics of Aerobic Activity

Thermal Relations

Food, Energy, and Temperature at Work: The Lives of Mammals in Frigid Places

Neurons

Synapses

Sensory Processes

Nervous System Organization and Biological Clocks

Endocrine and Neuroendocrine Physiology

Reproduction

Integrating Systems at Work: Animal Navigation

Control of Movement

Muscle

Movement and Muscle at Work: Plasticity in Response to Use and Disuse

Introduction to Oxygen and Carbon Dioxide in Physiology

External Respiration: the Physiology of Breathing

Circulation

Oxygen, Carbon Dioxide, and Internal Transport at Work: Diving by Marine Mammals

Water and Salt Physiology: Introduction and Mechanisms

Kidneys and Excretion With Notes on Nitrogen Excretion

Water, Salts, and Excretion at Work: Mammals of Deserts and Dry Savannas

Water and Salt Physiology of Animals in Their Environments

Filters

Refer to the figure. The figure shown shows that a reduction in O₂ affinity

_ binds to hemoglobin at the allosteric site and _.

If HCO₃^- is retained in the body, it binds with _ and causes the body fluids to become more _.

In octopuses, venous saturation is about _% at rest and about _% during exercise.

When the body detects _, _ is secreted to increase the production of red blood cells.

What determines the shape of the CO₂ dissociation curve?

The venous blood displays a reduced O₂ affinity compared to arterial blood because its

Explain the significance of measurements of mixed venous O₂ partial pressure.

A respiratory pigment that requires a relatively low O₂ partial pressure for loading has _______ affinity for O₂.