ATI TEAS Test – Science
Section: Comprehensive
Practice Question Bank
(150 Questions with
Answers & Rationales)
Table of Contents
Question
Section Topic Area
Numbers
Human Anatomy & Physiology – General, Integumentary,
I 1–25
& Musculoskeletal
Human Anatomy & Physiology – Cardiovascular &
II 26–50
Respiratory
Human Anatomy & Physiology – Digestive, Renal, &
III 51–75
Endocrine
, Question
Section Topic Area
Numbers
Human Anatomy & Physiology – Nervous, Reproductive, &
IV 76–100
Immune
V Biology – Cell Structure, Organelles, & Metabolism 101–120
Biology – Genetics, DNA, Protein Synthesis, & Cellular
VI 121–135
Respiration
VII Chemistry – Atomic Structure, Bonding, & Periodic Table 136–145
VIII Chemistry – Solutions, Acids/Bases, & Chemical Reactions 146–150
SECTION I: Human Anatomy & Physiology – General, Integumentary, &
Musculoskeletal
Question 1
Which term describes the body's ability to maintain a relatively stable internal environment
despite external fluctuations?
A) Metabolism
B) Homeostasis
C) Anabolism
D) Catabolism
CorreCt Answer: B
Rationale: Homeostasis is the physiological process by which the body maintains stable internal
conditions such as temperature, pH, and fluid balance. Metabolism refers to all chemical
reactions in the body, while anabolism and catabolism are specific metabolic processes.
Question 2
The plane that divides the body into equal left and right halves is the:
A) Coronal plane
,B) Transverse plane
C) Midsagittal plane
D) Parasagittal plane
CorreCt Answer: C
Rationale: The midsagittal (median) plane divides the body into equal left and right halves. The
coronal plane divides anterior from posterior, and the transverse plane divides superior from
inferior.
Question 3
Which of the following lists the levels of structural organization in the human body in the
correct order, from simplest to most complex?
A) Cell → Tissue → Organ → Organ system → Organism
B) Tissue → Cell → Organ → Organ system → Organism
C) Cell → Organ → Tissue → Organ system → Organism
D) Organ → Tissue → Cell → Organ system → Organism
CorreCt Answer: A
Rationale: The correct hierarchical organization is: cell → tissue → organ → organ system →
organism. Cells form tissues, tissues form organs, organs form organ systems, and organ systems
compose the organism.
Question 4
Which type of tissue covers body surfaces, lines body cavities, and forms glands?
A) Connective tissue
B) Muscle tissue
C) Nervous tissue
D) Epithelial tissue
CorreCt Answer: D
Rationale: Epithelial tissue functions in protection, absorption, secretion, and sensation. It
covers body surfaces, lines internal cavities, and forms glands.
Question 5
Which of the following is a function of the integumentary system?
A) Vitamin D synthesis
B) Hematopoiesis
, C) Calcium storage
D) Filtration of blood
CorreCt Answer: A
Rationale: The integumentary system (skin) synthesizes vitamin D when exposed to UV light.
Hematopoiesis occurs in bone marrow, calcium storage in bones, and blood filtration in the
kidneys.
Question 6
The outermost layer of the skin is the:
A) Dermis
B) Hypodermis
C) Epidermis
D) Subcutaneous layer
CorreCt Answer: C
Rationale: The epidermis is the outermost layer of the skin. The dermis lies beneath it, and the
hypodermis (subcutaneous layer) is the deepest layer.
Question 7
Which of the following would you expect to find in the skin's dermis?
A) Stratified squamous epithelium
B) Blood vessels, nerve endings, and hair follicles
C) Keratinized cells
D) Melanocytes
CorreCt Answer: B
Rationale: The dermis contains blood vessels, nerve endings, hair follicles, sweat glands, and
sebaceous glands. The epidermis contains stratified squamous epithelium, keratinized cells, and
melanocytes.
Question 8
Which type of muscle tissue is striated, voluntary, and attached to bones?
A) Cardiac muscle
B) Smooth muscle
C) Skeletal muscle
D) Visceral muscle
Section: Comprehensive
Practice Question Bank
(150 Questions with
Answers & Rationales)
Table of Contents
Question
Section Topic Area
Numbers
Human Anatomy & Physiology – General, Integumentary,
I 1–25
& Musculoskeletal
Human Anatomy & Physiology – Cardiovascular &
II 26–50
Respiratory
Human Anatomy & Physiology – Digestive, Renal, &
III 51–75
Endocrine
, Question
Section Topic Area
Numbers
Human Anatomy & Physiology – Nervous, Reproductive, &
IV 76–100
Immune
V Biology – Cell Structure, Organelles, & Metabolism 101–120
Biology – Genetics, DNA, Protein Synthesis, & Cellular
VI 121–135
Respiration
VII Chemistry – Atomic Structure, Bonding, & Periodic Table 136–145
VIII Chemistry – Solutions, Acids/Bases, & Chemical Reactions 146–150
SECTION I: Human Anatomy & Physiology – General, Integumentary, &
Musculoskeletal
Question 1
Which term describes the body's ability to maintain a relatively stable internal environment
despite external fluctuations?
A) Metabolism
B) Homeostasis
C) Anabolism
D) Catabolism
CorreCt Answer: B
Rationale: Homeostasis is the physiological process by which the body maintains stable internal
conditions such as temperature, pH, and fluid balance. Metabolism refers to all chemical
reactions in the body, while anabolism and catabolism are specific metabolic processes.
Question 2
The plane that divides the body into equal left and right halves is the:
A) Coronal plane
,B) Transverse plane
C) Midsagittal plane
D) Parasagittal plane
CorreCt Answer: C
Rationale: The midsagittal (median) plane divides the body into equal left and right halves. The
coronal plane divides anterior from posterior, and the transverse plane divides superior from
inferior.
Question 3
Which of the following lists the levels of structural organization in the human body in the
correct order, from simplest to most complex?
A) Cell → Tissue → Organ → Organ system → Organism
B) Tissue → Cell → Organ → Organ system → Organism
C) Cell → Organ → Tissue → Organ system → Organism
D) Organ → Tissue → Cell → Organ system → Organism
CorreCt Answer: A
Rationale: The correct hierarchical organization is: cell → tissue → organ → organ system →
organism. Cells form tissues, tissues form organs, organs form organ systems, and organ systems
compose the organism.
Question 4
Which type of tissue covers body surfaces, lines body cavities, and forms glands?
A) Connective tissue
B) Muscle tissue
C) Nervous tissue
D) Epithelial tissue
CorreCt Answer: D
Rationale: Epithelial tissue functions in protection, absorption, secretion, and sensation. It
covers body surfaces, lines internal cavities, and forms glands.
Question 5
Which of the following is a function of the integumentary system?
A) Vitamin D synthesis
B) Hematopoiesis
, C) Calcium storage
D) Filtration of blood
CorreCt Answer: A
Rationale: The integumentary system (skin) synthesizes vitamin D when exposed to UV light.
Hematopoiesis occurs in bone marrow, calcium storage in bones, and blood filtration in the
kidneys.
Question 6
The outermost layer of the skin is the:
A) Dermis
B) Hypodermis
C) Epidermis
D) Subcutaneous layer
CorreCt Answer: C
Rationale: The epidermis is the outermost layer of the skin. The dermis lies beneath it, and the
hypodermis (subcutaneous layer) is the deepest layer.
Question 7
Which of the following would you expect to find in the skin's dermis?
A) Stratified squamous epithelium
B) Blood vessels, nerve endings, and hair follicles
C) Keratinized cells
D) Melanocytes
CorreCt Answer: B
Rationale: The dermis contains blood vessels, nerve endings, hair follicles, sweat glands, and
sebaceous glands. The epidermis contains stratified squamous epithelium, keratinized cells, and
melanocytes.
Question 8
Which type of muscle tissue is striated, voluntary, and attached to bones?
A) Cardiac muscle
B) Smooth muscle
C) Skeletal muscle
D) Visceral muscle
