6/9/25, 6:26 AM BIOL 546 Practice Questions Exam 3
BIOL 546 ACTUAL PRACTICE EXAM 3 2025-2026 \LATEST
UPDATE \COMPLETE QUESTIONS AND ACCURATE
DETAILED ANSWERS \VERIFIED ANSWERS ALREADY
GRADED A+ \REAL EXAM 2025-2026
The structure of hemoglobin: c. is a four-subunit protein containing iron
A) allows it to irreversibly
bind four O2 molecules.
B) binds oxygen and will not
release it until it is replaced
with CO2.
C) is a four-subunit protein
containing iron.
D) None of the above choices
is correct.
The affinity of hemoglobin for a. increased
oxygen is
_ _ as the partial pressure of
oxygen is
raised.
A) increased
B) decreased
C) unchanged
The Bohr effect describes the a. effect of pH on the affinity of hemoglobin for oxygen
____________________ _.
A) effect of pH on the
affinity of
hemoglobin for
oxygen
B) effect of pH on the
affinity of
hemoglobin for
carbon dioxide
C) ventilation mechanism
1/24
,6/9/25, 6:26 AM BIOL 546 Practice Questions Exam 3
D) effect of solubility on the
amount of gas dissolved in
blood
An increase in 2,3- b. decrease
diphosphoglyceric acid
(2,3-DPG) will the
affinity of
hemoglobin for oxygen.
A) increase
B) decrease
C) have no effect on
Carbon dioxide oxygen a. increases; improves
unloading.
Oxygen unloading carbon
dioxide
transport.
A) increases; improves
B) increases; worsens
C) decreases; improves
D) decreases; worsens
Which of the following is the b. nasal passage, pharynx, bronchi, bronchioles, alveoli
correct pathway air takes
during a human
inhalation?
A) nasal passage, pharynx,
bronchioles, bronchi,
trachea, alveoli
B) nasal passage,
pharynx, trachea,
bronchi, bronchioles,
alveoli
C) nasal passage,
trachea, pharynx,
bronchi, alveoli,
bronchioles
D) nasal passage,
pharynx, bronchi,
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, 6/9/25, 6:26 AM BIOL 546 Practice Questions Exam 3
bronchioles, trachea,
alveoli
E) nasal passage, trachea,
pharynx, alveoli, bronchi,
bronchioles
What condition results in a d. increase in membrane thickness
slower diffusion rate?
A) A decrease in distance
traveled.
B) An increase in cross-
sectional area.
C) An increase in
concentration gradient.
D) An increase in membrane
thickness.
All of the above.
E)
The rhythmicity center for c. medulla oblongata
breathing is located in
the _______ _.
A) hypothalamus
B) cerebral cortex
C) medulla oblongata
D) midbrain
Andrew has his gall bladder a. lipids
removed after developing
several large gall stones.
After surgery, he cannot
release large batches of bile
into the duodenum,
instead, bile is
added slowly in small
amounts. What
nutrient group might Andrew
have trouble digesting when
consumed in larger
quantities?
A) Lipids
3/24
BIOL 546 ACTUAL PRACTICE EXAM 3 2025-2026 \LATEST
UPDATE \COMPLETE QUESTIONS AND ACCURATE
DETAILED ANSWERS \VERIFIED ANSWERS ALREADY
GRADED A+ \REAL EXAM 2025-2026
The structure of hemoglobin: c. is a four-subunit protein containing iron
A) allows it to irreversibly
bind four O2 molecules.
B) binds oxygen and will not
release it until it is replaced
with CO2.
C) is a four-subunit protein
containing iron.
D) None of the above choices
is correct.
The affinity of hemoglobin for a. increased
oxygen is
_ _ as the partial pressure of
oxygen is
raised.
A) increased
B) decreased
C) unchanged
The Bohr effect describes the a. effect of pH on the affinity of hemoglobin for oxygen
____________________ _.
A) effect of pH on the
affinity of
hemoglobin for
oxygen
B) effect of pH on the
affinity of
hemoglobin for
carbon dioxide
C) ventilation mechanism
1/24
,6/9/25, 6:26 AM BIOL 546 Practice Questions Exam 3
D) effect of solubility on the
amount of gas dissolved in
blood
An increase in 2,3- b. decrease
diphosphoglyceric acid
(2,3-DPG) will the
affinity of
hemoglobin for oxygen.
A) increase
B) decrease
C) have no effect on
Carbon dioxide oxygen a. increases; improves
unloading.
Oxygen unloading carbon
dioxide
transport.
A) increases; improves
B) increases; worsens
C) decreases; improves
D) decreases; worsens
Which of the following is the b. nasal passage, pharynx, bronchi, bronchioles, alveoli
correct pathway air takes
during a human
inhalation?
A) nasal passage, pharynx,
bronchioles, bronchi,
trachea, alveoli
B) nasal passage,
pharynx, trachea,
bronchi, bronchioles,
alveoli
C) nasal passage,
trachea, pharynx,
bronchi, alveoli,
bronchioles
D) nasal passage,
pharynx, bronchi,
2/24
, 6/9/25, 6:26 AM BIOL 546 Practice Questions Exam 3
bronchioles, trachea,
alveoli
E) nasal passage, trachea,
pharynx, alveoli, bronchi,
bronchioles
What condition results in a d. increase in membrane thickness
slower diffusion rate?
A) A decrease in distance
traveled.
B) An increase in cross-
sectional area.
C) An increase in
concentration gradient.
D) An increase in membrane
thickness.
All of the above.
E)
The rhythmicity center for c. medulla oblongata
breathing is located in
the _______ _.
A) hypothalamus
B) cerebral cortex
C) medulla oblongata
D) midbrain
Andrew has his gall bladder a. lipids
removed after developing
several large gall stones.
After surgery, he cannot
release large batches of bile
into the duodenum,
instead, bile is
added slowly in small
amounts. What
nutrient group might Andrew
have trouble digesting when
consumed in larger
quantities?
A) Lipids
3/24
