Anatomy & Physiology 2e, OpenStax, 2026/2027 – Instructor Answer
Guide with Complete Solutions
,Anatomy & Physiology 2e, OpenStax, 2026/2027 – Instructor Answer
Guide with Complete Solutions
UNIT 1 — FOUNDATIONS, CHEMISTRY, CELLS & TISSUES
1.
Which statement best describes physiology?
A. The study of body structures
B. The study of how body structures function
C. The study of diseases only
D. The study of tissues under a microscope
Answer: B. The study of how body structures function
Rationale: Physiology focuses on the functions and mechanisms of
living organisms. Anatomy focuses primarily on structure and the
relationships among structures.
2.
Which level of organization consists of two or more tissue types
working together?
A. Cellular
B. Tissue
C. Organ
D. Organ-system
Answer: C. Organ
Rationale: An organ is composed of at least two tissue types that work
together to perform specific functions.
3.
,Which characteristic allows the body to maintain relatively stable
internal conditions?
A. Metabolism
B. Homeostasis
C. Differentiation
D. Reproduction
Answer: B. Homeostasis
Rationale: Homeostasis is the maintenance of relatively stable internal
conditions despite changes in the external or internal environment.
4.
Which component of a negative-feedback loop detects a change in a
regulated variable?
A. Effector
B. Control center
C. Receptor
D. Stimulus
Answer: C. Receptor
Rationale: Receptors monitor changes and send information to the
control center, which determines the appropriate response.
5.
Which anatomical plane divides the body into anterior and posterior
portions?
A. Sagittal
B. Transverse
C. Frontal
D. Median
, Answer: C. Frontal
Rationale: The frontal, or coronal, plane separates the body into
anterior and posterior portions.
6.
Which term means closer to the midline of the body?
A. Lateral
B. Medial
C. Distal
D. Superficial
Answer: B. Medial
Rationale: Medial indicates a position closer to the body's midsagittal
plane, whereas lateral means farther from it.
7.
Which imaging technique uses magnetic fields and radio waves?
A. CT
B. MRI
C. PET
D. Ultrasound
Answer: B. MRI
Rationale: Magnetic resonance imaging uses magnetic fields and
radiofrequency energy to generate detailed images of internal
structures.
8.
Which organ system is primarily responsible for transporting oxygen,
nutrients, hormones, and wastes?
Guide with Complete Solutions
,Anatomy & Physiology 2e, OpenStax, 2026/2027 – Instructor Answer
Guide with Complete Solutions
UNIT 1 — FOUNDATIONS, CHEMISTRY, CELLS & TISSUES
1.
Which statement best describes physiology?
A. The study of body structures
B. The study of how body structures function
C. The study of diseases only
D. The study of tissues under a microscope
Answer: B. The study of how body structures function
Rationale: Physiology focuses on the functions and mechanisms of
living organisms. Anatomy focuses primarily on structure and the
relationships among structures.
2.
Which level of organization consists of two or more tissue types
working together?
A. Cellular
B. Tissue
C. Organ
D. Organ-system
Answer: C. Organ
Rationale: An organ is composed of at least two tissue types that work
together to perform specific functions.
3.
,Which characteristic allows the body to maintain relatively stable
internal conditions?
A. Metabolism
B. Homeostasis
C. Differentiation
D. Reproduction
Answer: B. Homeostasis
Rationale: Homeostasis is the maintenance of relatively stable internal
conditions despite changes in the external or internal environment.
4.
Which component of a negative-feedback loop detects a change in a
regulated variable?
A. Effector
B. Control center
C. Receptor
D. Stimulus
Answer: C. Receptor
Rationale: Receptors monitor changes and send information to the
control center, which determines the appropriate response.
5.
Which anatomical plane divides the body into anterior and posterior
portions?
A. Sagittal
B. Transverse
C. Frontal
D. Median
, Answer: C. Frontal
Rationale: The frontal, or coronal, plane separates the body into
anterior and posterior portions.
6.
Which term means closer to the midline of the body?
A. Lateral
B. Medial
C. Distal
D. Superficial
Answer: B. Medial
Rationale: Medial indicates a position closer to the body's midsagittal
plane, whereas lateral means farther from it.
7.
Which imaging technique uses magnetic fields and radio waves?
A. CT
B. MRI
C. PET
D. Ultrasound
Answer: B. MRI
Rationale: Magnetic resonance imaging uses magnetic fields and
radiofrequency energy to generate detailed images of internal
structures.
8.
Which organ system is primarily responsible for transporting oxygen,
nutrients, hormones, and wastes?
