BIOL 252 Human Anatomy & Physiology II with Lab
Module 1 Exam Review | 75+ Practice Questions &
Answers with Explanations | Portage Learning
LockDown Browser Study Guide
Prepare for the BIOL 252 Human Anatomy & Physiology II with Lab Module 1 Exam
with this comprehensive 75+ question practice review featuring multiple-choice questions,
detailed answers, and clear explanations. Covers homeostasis, chemistry review, cell
physiology, tissues, membranes, transport mechanisms, fluid balance, and foundational
anatomy and physiology concepts tested in Portage Learning's LockDown Browser
Module 1 Exam. Ideal for exam preparation, self-assessment, and reinforcing essential
Human Anatomy & Physiology II concepts.
1. Which body fluid compartment contains the greatest percentage of total body
water in a healthy adult?
A. Plasma
B. Interstitial fluid
C. Transcellular fluid
D. Intracellular fluid
Answer: D. Intracellular fluid
Approximately two-thirds of the body's total water is found within cells, making intracellular
fluid the largest fluid compartment.
2. Which electrolyte is the most abundant positively charged ion found within
intracellular fluid?
A. Sodium
B. Calcium
C. Magnesium
D. Potassium
Answer: D. Potassium
, Potassium is the primary intracellular cation and plays essential roles in nerve impulse
transmission, muscle contraction, and maintaining cellular function.
3. Which electrolyte is the most abundant positively charged ion present in
extracellular fluid?
A. Potassium
B. Calcium
C. Magnesium
D. Sodium
Answer: D. Sodium
Sodium is the major extracellular cation responsible for regulating fluid balance, blood
pressure, and nerve impulse conduction.
4. Which process describes the movement of water across a selectively permeable
membrane from an area of lower solute concentration to higher solute
concentration?
A. Diffusion
B. Active transport
C. Filtration
D. Osmosis
Answer: D. Osmosis
Osmosis is the passive movement of water across a selectively permeable membrane
toward an area containing a higher solute concentration.
5. Which transport mechanism requires cellular energy in the form of ATP to move
substances against their concentration gradient?
A. Facilitated diffusion
B. Simple diffusion
C. Osmosis
D. Active transport
, Answer: D. Active transport
Active transport uses ATP to move molecules from areas of lower concentration to higher
concentration against their concentration gradient.
6. Which membrane transport process allows molecules to move from an area of
higher concentration to lower concentration without requiring cellular energy?
A. Active transport
B. Endocytosis
C. Exocytosis
D. Simple diffusion
Answer: D. Simple diffusion
Simple diffusion is a passive process in which molecules move naturally down their
concentration gradient without ATP expenditure.
7. Which membrane transport process requires carrier proteins but does not require
ATP to move substances across the plasma membrane?
A. Active transport
B. Endocytosis
C. Phagocytosis
D. Facilitated diffusion
Answer: D. Facilitated diffusion
Facilitated diffusion uses membrane carrier or channel proteins to transport molecules
down their concentration gradient without using energy.
8. Which process enables cells to engulf large solid particles such as bacteria or
cellular debris?
A. Pinocytosis
B. Exocytosis
C. Diffusion
D. Phagocytosis
Module 1 Exam Review | 75+ Practice Questions &
Answers with Explanations | Portage Learning
LockDown Browser Study Guide
Prepare for the BIOL 252 Human Anatomy & Physiology II with Lab Module 1 Exam
with this comprehensive 75+ question practice review featuring multiple-choice questions,
detailed answers, and clear explanations. Covers homeostasis, chemistry review, cell
physiology, tissues, membranes, transport mechanisms, fluid balance, and foundational
anatomy and physiology concepts tested in Portage Learning's LockDown Browser
Module 1 Exam. Ideal for exam preparation, self-assessment, and reinforcing essential
Human Anatomy & Physiology II concepts.
1. Which body fluid compartment contains the greatest percentage of total body
water in a healthy adult?
A. Plasma
B. Interstitial fluid
C. Transcellular fluid
D. Intracellular fluid
Answer: D. Intracellular fluid
Approximately two-thirds of the body's total water is found within cells, making intracellular
fluid the largest fluid compartment.
2. Which electrolyte is the most abundant positively charged ion found within
intracellular fluid?
A. Sodium
B. Calcium
C. Magnesium
D. Potassium
Answer: D. Potassium
, Potassium is the primary intracellular cation and plays essential roles in nerve impulse
transmission, muscle contraction, and maintaining cellular function.
3. Which electrolyte is the most abundant positively charged ion present in
extracellular fluid?
A. Potassium
B. Calcium
C. Magnesium
D. Sodium
Answer: D. Sodium
Sodium is the major extracellular cation responsible for regulating fluid balance, blood
pressure, and nerve impulse conduction.
4. Which process describes the movement of water across a selectively permeable
membrane from an area of lower solute concentration to higher solute
concentration?
A. Diffusion
B. Active transport
C. Filtration
D. Osmosis
Answer: D. Osmosis
Osmosis is the passive movement of water across a selectively permeable membrane
toward an area containing a higher solute concentration.
5. Which transport mechanism requires cellular energy in the form of ATP to move
substances against their concentration gradient?
A. Facilitated diffusion
B. Simple diffusion
C. Osmosis
D. Active transport
, Answer: D. Active transport
Active transport uses ATP to move molecules from areas of lower concentration to higher
concentration against their concentration gradient.
6. Which membrane transport process allows molecules to move from an area of
higher concentration to lower concentration without requiring cellular energy?
A. Active transport
B. Endocytosis
C. Exocytosis
D. Simple diffusion
Answer: D. Simple diffusion
Simple diffusion is a passive process in which molecules move naturally down their
concentration gradient without ATP expenditure.
7. Which membrane transport process requires carrier proteins but does not require
ATP to move substances across the plasma membrane?
A. Active transport
B. Endocytosis
C. Phagocytosis
D. Facilitated diffusion
Answer: D. Facilitated diffusion
Facilitated diffusion uses membrane carrier or channel proteins to transport molecules
down their concentration gradient without using energy.
8. Which process enables cells to engulf large solid particles such as bacteria or
cellular debris?
A. Pinocytosis
B. Exocytosis
C. Diffusion
D. Phagocytosis
