BIOL122 HUMAN BIOLOGICAL SCIENCE 2
QUIZ B COMPREHENSIVE REVIEW | 50
SHORT-ANSWER QUESTIONS WITH
ANSWERS AND DETAILED RATIONALES |
2026/2027 UPDATED | AUSTRALIAN
CATHOLIC UNIVERSITY [QUESTION 1-
200] AND ANSWERS UPDATED 2026/2027
| 100% VERIFIED | DETAILED
RATIONALES – PASS GUARANTEED A+
GRADED | INSTANT DOWNLOAD
INTRODUCTION
The BIOL122 Human Biological Science 2 Quiz B Comprehensive Review is
designed as an intensive practice resource for students studying Human Biological
Science 2 at Australian Catholic University. It focuses on integrated human biology
concepts that require students to connect structure, function, regulation, and
physiological responses rather than relying solely on memorisation. The material is
particularly useful for students preparing for Quiz B and broader course assessments
during the 2026/2027 academic period.
The questions emphasize application-level reasoning through clinical and
physiological scenarios involving body systems, cellular processes, regulation,
metabolism, reproduction, immunity, and homeostasis. Each question provides four
plausible answer choices, followed by a detailed rationale explaining the correct
response and why the alternatives are less appropriate.
Working through these questions can help students identify knowledge gaps, practise
interpreting physiological scenarios, strengthen connections between organ systems,
and develop the reasoning skills needed for assessment success. The resource is
intended as original exam-style practice material, not an official ACU examination
or leaked assessment.
CORE DOMAINS TESTED
1.
1
,Human homeostasis and physiological regulation — Integration of control
systems that maintain internal stability.
2.
3.
Nervous system physiology — Neural signalling, sensory processing,
autonomic regulation, and reflexes.
4.
5.
Endocrine regulation — Hormonal signalling, feedback mechanisms, and
endocrine control of body functions.
6.
7.
Cardiovascular physiology — Cardiac function, circulation, blood pressure,
and tissue perfusion.
8.
9.
Respiratory physiology — Ventilation, gas exchange, oxygen transport, and
carbon dioxide regulation.
10.
11.
Renal physiology — Filtration, reabsorption, secretion, electrolyte balance,
and fluid regulation.
12.
13.
Digestive physiology and metabolism — Digestion, absorption, nutrient
processing, and metabolic regulation.
14.
15.
Immune and lymphatic function — Innate and adaptive defence,
inflammation, and immune coordination.
16.
17.
2
, Musculoskeletal physiology — Bone, muscle contraction, movement, and
mineral homeostasis.
18.
19.
Reproductive physiology — Gametogenesis, hormonal regulation,
fertilisation, pregnancy, and reproductive cycles.
20.
21.
Cellular physiology and metabolism — Membrane transport, cellular energy
production, signalling, and biochemical integration.
22.
23.
Integrated organ-system physiology — Interactions among multiple systems
during physiological challenges.
24.
QUESTIONS 1-100
Q1: A student stands rapidly after lying down for 30 minutes
and briefly feels light-headed. Which physiological response
most directly restores cerebral perfusion?
A) Increased parasympathetic stimulation of the sinoatrial node
B) Increased sympathetic activity causing increased heart rate and peripheral
vasoconstriction
C) Reduced myocardial contractility with systemic vasodilation
D) Increased renal sodium excretion within several seconds
Rationale: The correct answer is B because standing suddenly reduces venous return
and therefore transiently lowers arterial pressure. Baroreceptors detect the fall in
arterial stretch and promote sympathetic activity, increasing heart rate, contractility,
and peripheral vasoconstriction to restore blood pressure and cerebral perfusion. A
is incorrect because increased parasympathetic activity would slow the heart. C
would further reduce blood pressure and would oppose the compensatory response. D
is incorrect because renal sodium handling contributes to longer-term blood-volume
regulation rather than the immediate response to standing.
Q2: A patient has damage to the posterior pituitary that
prevents normal release of antidiuretic hormone. Which
finding is most likely?
3
, A) Low urine volume with highly concentrated urine
B) Increased glucose reabsorption in the proximal tubule
C) Large volumes of dilute urine with increased thirst
D) Increased aldosterone secretion caused directly by the posterior pituitary
Rationale: The correct answer is C because antidiuretic hormone increases water
permeability of the collecting ducts, allowing greater water reabsorption. Reduced
ADH release therefore produces excessive dilute urine and compensatory thirst. A is
the opposite of the expected response. B concerns glucose handling and is not the
primary consequence of reduced ADH. D is incorrect because aldosterone is
produced by the adrenal cortex and is regulated primarily through the renin–
angiotensin–aldosterone system and potassium concentration.
Q3: During vigorous exercise, skeletal muscle oxygen demand
increases substantially. Which change most directly
facilitates oxygen unloading from haemoglobin in active
muscle?
A) Reduced carbon dioxide production
B) Increased blood pH
C) Reduced local temperature
D) Increased carbon dioxide and hydrogen ion concentration in the tissue
Rationale: The correct answer is D because active tissues produce carbon dioxide
and hydrogen ions, lowering local pH and reducing haemoglobin's affinity for oxygen.
This promotes oxygen unloading, contributing to the Bohr effect. A is incorrect
because active muscle generally produces more carbon dioxide. B would increase
haemoglobin's oxygen affinity rather than promote unloading. C is incorrect because
exercising muscle generally becomes warmer, and increased temperature also
favours oxygen release.
Q4: A patient with severe diarrhoea loses large quantities of
bicarbonate-rich intestinal fluid. Which acid-base
disturbance is most likely to develop?
A) Respiratory alkalosis
B) Metabolic alkalosis
C) Respiratory acidosis
D) Metabolic acidosis
Rationale: The correct answer is D because intestinal bicarbonate loss reduces the
body's buffering capacity and causes a primary metabolic acidosis. A respiratory
alkalosis results from excessive carbon dioxide elimination, which is not the primary
event here. B is incorrect because bicarbonate loss decreases rather than increases
systemic bicarbonate. C would primarily result from inadequate ventilation and
carbon dioxide retention.
4
QUIZ B COMPREHENSIVE REVIEW | 50
SHORT-ANSWER QUESTIONS WITH
ANSWERS AND DETAILED RATIONALES |
2026/2027 UPDATED | AUSTRALIAN
CATHOLIC UNIVERSITY [QUESTION 1-
200] AND ANSWERS UPDATED 2026/2027
| 100% VERIFIED | DETAILED
RATIONALES – PASS GUARANTEED A+
GRADED | INSTANT DOWNLOAD
INTRODUCTION
The BIOL122 Human Biological Science 2 Quiz B Comprehensive Review is
designed as an intensive practice resource for students studying Human Biological
Science 2 at Australian Catholic University. It focuses on integrated human biology
concepts that require students to connect structure, function, regulation, and
physiological responses rather than relying solely on memorisation. The material is
particularly useful for students preparing for Quiz B and broader course assessments
during the 2026/2027 academic period.
The questions emphasize application-level reasoning through clinical and
physiological scenarios involving body systems, cellular processes, regulation,
metabolism, reproduction, immunity, and homeostasis. Each question provides four
plausible answer choices, followed by a detailed rationale explaining the correct
response and why the alternatives are less appropriate.
Working through these questions can help students identify knowledge gaps, practise
interpreting physiological scenarios, strengthen connections between organ systems,
and develop the reasoning skills needed for assessment success. The resource is
intended as original exam-style practice material, not an official ACU examination
or leaked assessment.
CORE DOMAINS TESTED
1.
1
,Human homeostasis and physiological regulation — Integration of control
systems that maintain internal stability.
2.
3.
Nervous system physiology — Neural signalling, sensory processing,
autonomic regulation, and reflexes.
4.
5.
Endocrine regulation — Hormonal signalling, feedback mechanisms, and
endocrine control of body functions.
6.
7.
Cardiovascular physiology — Cardiac function, circulation, blood pressure,
and tissue perfusion.
8.
9.
Respiratory physiology — Ventilation, gas exchange, oxygen transport, and
carbon dioxide regulation.
10.
11.
Renal physiology — Filtration, reabsorption, secretion, electrolyte balance,
and fluid regulation.
12.
13.
Digestive physiology and metabolism — Digestion, absorption, nutrient
processing, and metabolic regulation.
14.
15.
Immune and lymphatic function — Innate and adaptive defence,
inflammation, and immune coordination.
16.
17.
2
, Musculoskeletal physiology — Bone, muscle contraction, movement, and
mineral homeostasis.
18.
19.
Reproductive physiology — Gametogenesis, hormonal regulation,
fertilisation, pregnancy, and reproductive cycles.
20.
21.
Cellular physiology and metabolism — Membrane transport, cellular energy
production, signalling, and biochemical integration.
22.
23.
Integrated organ-system physiology — Interactions among multiple systems
during physiological challenges.
24.
QUESTIONS 1-100
Q1: A student stands rapidly after lying down for 30 minutes
and briefly feels light-headed. Which physiological response
most directly restores cerebral perfusion?
A) Increased parasympathetic stimulation of the sinoatrial node
B) Increased sympathetic activity causing increased heart rate and peripheral
vasoconstriction
C) Reduced myocardial contractility with systemic vasodilation
D) Increased renal sodium excretion within several seconds
Rationale: The correct answer is B because standing suddenly reduces venous return
and therefore transiently lowers arterial pressure. Baroreceptors detect the fall in
arterial stretch and promote sympathetic activity, increasing heart rate, contractility,
and peripheral vasoconstriction to restore blood pressure and cerebral perfusion. A
is incorrect because increased parasympathetic activity would slow the heart. C
would further reduce blood pressure and would oppose the compensatory response. D
is incorrect because renal sodium handling contributes to longer-term blood-volume
regulation rather than the immediate response to standing.
Q2: A patient has damage to the posterior pituitary that
prevents normal release of antidiuretic hormone. Which
finding is most likely?
3
, A) Low urine volume with highly concentrated urine
B) Increased glucose reabsorption in the proximal tubule
C) Large volumes of dilute urine with increased thirst
D) Increased aldosterone secretion caused directly by the posterior pituitary
Rationale: The correct answer is C because antidiuretic hormone increases water
permeability of the collecting ducts, allowing greater water reabsorption. Reduced
ADH release therefore produces excessive dilute urine and compensatory thirst. A is
the opposite of the expected response. B concerns glucose handling and is not the
primary consequence of reduced ADH. D is incorrect because aldosterone is
produced by the adrenal cortex and is regulated primarily through the renin–
angiotensin–aldosterone system and potassium concentration.
Q3: During vigorous exercise, skeletal muscle oxygen demand
increases substantially. Which change most directly
facilitates oxygen unloading from haemoglobin in active
muscle?
A) Reduced carbon dioxide production
B) Increased blood pH
C) Reduced local temperature
D) Increased carbon dioxide and hydrogen ion concentration in the tissue
Rationale: The correct answer is D because active tissues produce carbon dioxide
and hydrogen ions, lowering local pH and reducing haemoglobin's affinity for oxygen.
This promotes oxygen unloading, contributing to the Bohr effect. A is incorrect
because active muscle generally produces more carbon dioxide. B would increase
haemoglobin's oxygen affinity rather than promote unloading. C is incorrect because
exercising muscle generally becomes warmer, and increased temperature also
favours oxygen release.
Q4: A patient with severe diarrhoea loses large quantities of
bicarbonate-rich intestinal fluid. Which acid-base
disturbance is most likely to develop?
A) Respiratory alkalosis
B) Metabolic alkalosis
C) Respiratory acidosis
D) Metabolic acidosis
Rationale: The correct answer is D because intestinal bicarbonate loss reduces the
body's buffering capacity and causes a primary metabolic acidosis. A respiratory
alkalosis results from excessive carbon dioxide elimination, which is not the primary
event here. B is incorrect because bicarbonate loss decreases rather than increases
systemic bicarbonate. C would primarily result from inadequate ventilation and
carbon dioxide retention.
4
