BIO 201 EXAMS 1–4 – ANATOMY &
PHYSIOLOGY I (STRAIGHTERLINE) –
250+ ACTUAL EXAM QUESTIONS
WITH VERIFIED ANSWERS &
DETAILED RATIONALES
Course: BIO 201 – Anatomy & Physiology I
Institution: StraighterLine
Exams: Exam 1, Exam 2, Exam 3, Exam 4
Academic Year: 2026
Document Contents:
• 250+ high-yield multiple-choice and select-all-that-apply questions
• Verified correct answers with comprehensive rationales
• Coverage of all core BIO 201 topics across four exams: Anatomical Terminology &
Homeostasis, Chemistry & Cellular Biology, Tissues & Integumentary System,
Skeletal System & Joints, Muscular System, Nervous System (Central, Peripheral &
Autonomic), and Special Senses
• Organized by exam for focused review
SECTION 1: EXAM 1 – INTRODUCTION, CHEMISTRY &
CELLULAR BIOLOGY (Questions 1–65)
1. The study of the structure of body parts and their relationships is called:
A) Physiology
B) Anatomy
,C) Histology
D) Cytology
Correct Answer: B) Anatomy
Rationale: Anatomy focuses on the form and organization of structures. Physiology
studies function, histology studies tissues, and cytology studies cells.
2. The principle that function reflects structure is known as:
A) Homeostasis
B) Complementarity of structure and function
C) Negative feedback
D) Hierarchy of organization
Correct Answer: B) Complementarity of structure and function
Rationale: This principle states that what a structure can do depends on its specific
form. For example, bones support and protect because they contain hard mineral
deposits.
3. The simplest level of organization in the human body is the:
A) Cellular level
B) Tissue level
C) Chemical level
D) Organ level
Correct Answer: C) Chemical level
,Rationale: The chemical level includes atoms and molecules, which are the building
blocks for cells, tissues, and organs.
4. The maintenance of a relatively stable internal environment despite external
changes is termed:
A) Metabolism
B) Adaptation
C) Responsiveness
D) Homeostasis
Correct Answer: D) Homeostasis
Rationale: Homeostasis is a dynamic equilibrium maintained by feedback mechanisms.
Metabolism is the sum of chemical reactions; adaptation is a long-term adjustment.
5. A feedback mechanism that enhances or amplifies a change is called:
A) Positive feedback
B) Negative feedback
C) Feedforward control
D) Homeostatic imbalance
Correct Answer: A) Positive feedback
Rationale: Positive feedback increases the output of a system, such as blood clotting
and childbirth. Negative feedback counteracts changes.
, 6. Body temperature regulation is an example of which type of feedback?
A) Positive feedback
B) Negative feedback
C) Feedforward
D) Oscillating feedback
Correct Answer: B) Negative feedback
Rationale: When body temperature rises, mechanisms (sweating, vasodilation) act to
reduce it, returning it to the set point.
7. In the anatomical position, the body is:
A) Lying face down
B) Sitting upright
C) Standing upright, palms facing forward
D) Standing with arms crossed
Correct Answer: C) Standing upright, palms facing forward
Rationale: In anatomical position, the body is standing upright, facing forward, with
arms at the sides and palms facing forward.
8. The dorsal body cavity includes the:
PHYSIOLOGY I (STRAIGHTERLINE) –
250+ ACTUAL EXAM QUESTIONS
WITH VERIFIED ANSWERS &
DETAILED RATIONALES
Course: BIO 201 – Anatomy & Physiology I
Institution: StraighterLine
Exams: Exam 1, Exam 2, Exam 3, Exam 4
Academic Year: 2026
Document Contents:
• 250+ high-yield multiple-choice and select-all-that-apply questions
• Verified correct answers with comprehensive rationales
• Coverage of all core BIO 201 topics across four exams: Anatomical Terminology &
Homeostasis, Chemistry & Cellular Biology, Tissues & Integumentary System,
Skeletal System & Joints, Muscular System, Nervous System (Central, Peripheral &
Autonomic), and Special Senses
• Organized by exam for focused review
SECTION 1: EXAM 1 – INTRODUCTION, CHEMISTRY &
CELLULAR BIOLOGY (Questions 1–65)
1. The study of the structure of body parts and their relationships is called:
A) Physiology
B) Anatomy
,C) Histology
D) Cytology
Correct Answer: B) Anatomy
Rationale: Anatomy focuses on the form and organization of structures. Physiology
studies function, histology studies tissues, and cytology studies cells.
2. The principle that function reflects structure is known as:
A) Homeostasis
B) Complementarity of structure and function
C) Negative feedback
D) Hierarchy of organization
Correct Answer: B) Complementarity of structure and function
Rationale: This principle states that what a structure can do depends on its specific
form. For example, bones support and protect because they contain hard mineral
deposits.
3. The simplest level of organization in the human body is the:
A) Cellular level
B) Tissue level
C) Chemical level
D) Organ level
Correct Answer: C) Chemical level
,Rationale: The chemical level includes atoms and molecules, which are the building
blocks for cells, tissues, and organs.
4. The maintenance of a relatively stable internal environment despite external
changes is termed:
A) Metabolism
B) Adaptation
C) Responsiveness
D) Homeostasis
Correct Answer: D) Homeostasis
Rationale: Homeostasis is a dynamic equilibrium maintained by feedback mechanisms.
Metabolism is the sum of chemical reactions; adaptation is a long-term adjustment.
5. A feedback mechanism that enhances or amplifies a change is called:
A) Positive feedback
B) Negative feedback
C) Feedforward control
D) Homeostatic imbalance
Correct Answer: A) Positive feedback
Rationale: Positive feedback increases the output of a system, such as blood clotting
and childbirth. Negative feedback counteracts changes.
, 6. Body temperature regulation is an example of which type of feedback?
A) Positive feedback
B) Negative feedback
C) Feedforward
D) Oscillating feedback
Correct Answer: B) Negative feedback
Rationale: When body temperature rises, mechanisms (sweating, vasodilation) act to
reduce it, returning it to the set point.
7. In the anatomical position, the body is:
A) Lying face down
B) Sitting upright
C) Standing upright, palms facing forward
D) Standing with arms crossed
Correct Answer: C) Standing upright, palms facing forward
Rationale: In anatomical position, the body is standing upright, facing forward, with
arms at the sides and palms facing forward.
8. The dorsal body cavity includes the:
