BIOL122 | BIOL 122 HUMAN
BIOLOGICAL SCIENCE BUNDLE WITH
COMPLETE SOLUTIONS | 2026/2027
UPDATED | ORIGINAL PRACTICE
QUESTION BANK
INTRODUCTION
BIOL122 Human Biological Science is designed to develop an integrated
understanding of human structure and function, connecting anatomical organisation
with physiological processes and the mechanisms that maintain internal stability. This
practice bundle is intended for students preparing for assessments in human biological
science and is structured to test understanding through application rather than simple
memorisation.
The questions emphasise clinical and physiological scenarios requiring students to
interpret information, connect multiple body systems, identify appropriate
physiological mechanisms, and apply foundational biological principles to unfamiliar
situations. Particular attention is given to homeostasis, nervous and endocrine
regulation, cardiovascular and respiratory function, digestion, renal regulation,
reproduction, immunity, and interactions between body systems.
Each question contains four answer choices, one best answer, and a detailed rationale
explaining the underlying biological reasoning and why the alternative options are
less appropriate. Working through these questions systematically can help identify
knowledge gaps, strengthen examination reasoning, and improve the ability to explain
physiological processes clearly and accurately.
CORE DOMAINS TESTED
1.
Cell Biology and Cellular Organisation — cellular structures, membrane
transport, signalling, metabolism, and tissue organisation.
2.
3.
Homeostasis and Physiological Regulation — feedback mechanisms and
maintenance of internal conditions.
4.
1
, 5.
Anatomical Organisation — relationships among cells, tissues, organs, and
organ systems.
6.
7.
Nervous System — neural communication, sensory processing, autonomic
regulation, and reflexes.
8.
9.
Endocrine System — hormones, receptors, feedback loops, and endocrine
regulation.
10.
11.
Cardiovascular System — cardiac function, blood vessels, circulation, and
tissue perfusion.
12.
13.
Respiratory System — ventilation, gas exchange, oxygen transport, and
carbon dioxide regulation.
14.
15.
Digestive System — gastrointestinal motility, digestion, absorption, and
nutrient processing.
16.
17.
Renal System — filtration, reabsorption, secretion, fluid balance, and acid-
base regulation.
18.
19.
Immune and Lymphatic Systems — innate and adaptive immunity,
inflammation, lymphatic function, and host defence.
20.
21.
2
, Musculoskeletal System — muscle contraction, skeletal organisation,
movement, and calcium regulation.
22.
23.
Reproductive System — reproductive anatomy, hormonal regulation,
gametogenesis, and reproductive physiology.
24.
25.
Integrated Human Physiology — interactions among organ systems in
maintaining homeostasis.
26.
QUESTIONS 1-100
Q1: A patient experiences severe dehydration after several
hours without access to water. Which physiological response
most directly helps restore extracellular fluid volume?
A) Reduced secretion of antidiuretic hormone
B) Increased antidiuretic hormone secretion and increased renal water
reabsorption
C) Increased urinary water loss
D) Suppression of thirst
Rationale: The correct answer is B because dehydration increases plasma osmolality
and stimulates antidiuretic hormone secretion, which increases water reabsorption by
the kidneys. Option A is incorrect because ADH generally increases rather than
decreases during dehydration. Option C is incorrect because conserving water is the
appropriate response. Option D is incorrect because thirst is also stimulated during
dehydration.
Q2: A red blood cell is placed into a solution with a
substantially lower solute concentration than its cytoplasm.
What is most likely to occur?
A) The cell loses water and shrinks
B) No movement of water occurs
C) Water enters the cell, causing it to swell
D) Sodium actively leaves the cell to prevent swelling
Rationale: The correct answer is C because water moves by osmosis toward the
compartment with greater effective solute concentration. A hypotonic solution causes
3
BIOLOGICAL SCIENCE BUNDLE WITH
COMPLETE SOLUTIONS | 2026/2027
UPDATED | ORIGINAL PRACTICE
QUESTION BANK
INTRODUCTION
BIOL122 Human Biological Science is designed to develop an integrated
understanding of human structure and function, connecting anatomical organisation
with physiological processes and the mechanisms that maintain internal stability. This
practice bundle is intended for students preparing for assessments in human biological
science and is structured to test understanding through application rather than simple
memorisation.
The questions emphasise clinical and physiological scenarios requiring students to
interpret information, connect multiple body systems, identify appropriate
physiological mechanisms, and apply foundational biological principles to unfamiliar
situations. Particular attention is given to homeostasis, nervous and endocrine
regulation, cardiovascular and respiratory function, digestion, renal regulation,
reproduction, immunity, and interactions between body systems.
Each question contains four answer choices, one best answer, and a detailed rationale
explaining the underlying biological reasoning and why the alternative options are
less appropriate. Working through these questions systematically can help identify
knowledge gaps, strengthen examination reasoning, and improve the ability to explain
physiological processes clearly and accurately.
CORE DOMAINS TESTED
1.
Cell Biology and Cellular Organisation — cellular structures, membrane
transport, signalling, metabolism, and tissue organisation.
2.
3.
Homeostasis and Physiological Regulation — feedback mechanisms and
maintenance of internal conditions.
4.
1
, 5.
Anatomical Organisation — relationships among cells, tissues, organs, and
organ systems.
6.
7.
Nervous System — neural communication, sensory processing, autonomic
regulation, and reflexes.
8.
9.
Endocrine System — hormones, receptors, feedback loops, and endocrine
regulation.
10.
11.
Cardiovascular System — cardiac function, blood vessels, circulation, and
tissue perfusion.
12.
13.
Respiratory System — ventilation, gas exchange, oxygen transport, and
carbon dioxide regulation.
14.
15.
Digestive System — gastrointestinal motility, digestion, absorption, and
nutrient processing.
16.
17.
Renal System — filtration, reabsorption, secretion, fluid balance, and acid-
base regulation.
18.
19.
Immune and Lymphatic Systems — innate and adaptive immunity,
inflammation, lymphatic function, and host defence.
20.
21.
2
, Musculoskeletal System — muscle contraction, skeletal organisation,
movement, and calcium regulation.
22.
23.
Reproductive System — reproductive anatomy, hormonal regulation,
gametogenesis, and reproductive physiology.
24.
25.
Integrated Human Physiology — interactions among organ systems in
maintaining homeostasis.
26.
QUESTIONS 1-100
Q1: A patient experiences severe dehydration after several
hours without access to water. Which physiological response
most directly helps restore extracellular fluid volume?
A) Reduced secretion of antidiuretic hormone
B) Increased antidiuretic hormone secretion and increased renal water
reabsorption
C) Increased urinary water loss
D) Suppression of thirst
Rationale: The correct answer is B because dehydration increases plasma osmolality
and stimulates antidiuretic hormone secretion, which increases water reabsorption by
the kidneys. Option A is incorrect because ADH generally increases rather than
decreases during dehydration. Option C is incorrect because conserving water is the
appropriate response. Option D is incorrect because thirst is also stimulated during
dehydration.
Q2: A red blood cell is placed into a solution with a
substantially lower solute concentration than its cytoplasm.
What is most likely to occur?
A) The cell loses water and shrinks
B) No movement of water occurs
C) Water enters the cell, causing it to swell
D) Sodium actively leaves the cell to prevent swelling
Rationale: The correct answer is C because water moves by osmosis toward the
compartment with greater effective solute concentration. A hypotonic solution causes
3
