BIO 201 Midterm Exam Review 2026 Practice Questions & Verified
Answers Anatomy & Physiology Study Guide
SECTION 1: FOUNDATIONS, HOMEOSTASIS, AND CHEMICAL LEVEL OF
ORGANIZATION (Questions 1-30)
Question 1
The study of the function of the body and its parts is called:
A) Anatomy
B) Histology
C) Physiology
D) Cytology
Answer: C
Rationale: Physiology is the study of how the body and its parts function.
Anatomy (A) is the study of structure. Histology (B) studies tissues. Cytology (D)
studies cells .
Question 2
Which of the following lists the levels of structural organization from simplest to
most complex?
A) Tissue, Cellular, Organ, Chemical, System, Organismal
,B) Chemical, Cellular, Tissue, Organ, System, Organismal
C) Chemical, Tissue, Cellular, Organ, System, Organismal
D) Organ, System, Tissue, Cellular, Chemical, Organismal
Answer: B
Rationale: The correct order from simplest to most complex is: Chemical
(atoms/molecules), Cellular (cells), Tissue (groups of similar cells), Organ (multiple
tissue types), System (related organs), Organismal (all systems) .
Question 3
A patient’s body temperature rises above normal. In response, blood vessels
dilate and sweating begins to cool the body. This is an example of:
A) Positive feedback
B) Negative feedback
C) Homeostatic imbalance
D) Pathophysiology
Answer: B
Rationale: Negative feedback reverses a change to maintain homeostasis. The
response (cooling) opposes the initial stimulus (rising temperature) .
,Question 4
Which of the following is an example of positive feedback?
A) Regulation of blood glucose by insulin
B) Blood pressure regulation
C) Enhancement of labor contractions by oxytocin
D) Body temperature regulation
Answer: C
Rationale: Positive feedback amplifies the original stimulus. Oxytocin causes
stronger uterine contractions, which stimulate more oxytocin release, creating a
cycle that ends with childbirth .
Question 5
The maintenance of a stable internal environment is called:
A) Metabolism
B) Homeostasis
C) Adaptation
D) Reproduction
, Answer: B
Rationale: Homeostasis refers to the maintenance of a relatively stable internal
environment despite external changes. Metabolism (A) is the sum of all chemical
reactions .
Question 6
The smallest unit of an element that still retains the properties of that element is
the:
A) Molecule
B) Atom
C) Proton
D) Electron
Answer: B
Rationale: An atom is the fundamental unit of an element. Molecules (A) are two
or more atoms bonded together. Protons (C) and electrons (D) are subatomic
particles .
Question 7
Which subatomic particle has a positive charge and is located in the nucleus?
Answers Anatomy & Physiology Study Guide
SECTION 1: FOUNDATIONS, HOMEOSTASIS, AND CHEMICAL LEVEL OF
ORGANIZATION (Questions 1-30)
Question 1
The study of the function of the body and its parts is called:
A) Anatomy
B) Histology
C) Physiology
D) Cytology
Answer: C
Rationale: Physiology is the study of how the body and its parts function.
Anatomy (A) is the study of structure. Histology (B) studies tissues. Cytology (D)
studies cells .
Question 2
Which of the following lists the levels of structural organization from simplest to
most complex?
A) Tissue, Cellular, Organ, Chemical, System, Organismal
,B) Chemical, Cellular, Tissue, Organ, System, Organismal
C) Chemical, Tissue, Cellular, Organ, System, Organismal
D) Organ, System, Tissue, Cellular, Chemical, Organismal
Answer: B
Rationale: The correct order from simplest to most complex is: Chemical
(atoms/molecules), Cellular (cells), Tissue (groups of similar cells), Organ (multiple
tissue types), System (related organs), Organismal (all systems) .
Question 3
A patient’s body temperature rises above normal. In response, blood vessels
dilate and sweating begins to cool the body. This is an example of:
A) Positive feedback
B) Negative feedback
C) Homeostatic imbalance
D) Pathophysiology
Answer: B
Rationale: Negative feedback reverses a change to maintain homeostasis. The
response (cooling) opposes the initial stimulus (rising temperature) .
,Question 4
Which of the following is an example of positive feedback?
A) Regulation of blood glucose by insulin
B) Blood pressure regulation
C) Enhancement of labor contractions by oxytocin
D) Body temperature regulation
Answer: C
Rationale: Positive feedback amplifies the original stimulus. Oxytocin causes
stronger uterine contractions, which stimulate more oxytocin release, creating a
cycle that ends with childbirth .
Question 5
The maintenance of a stable internal environment is called:
A) Metabolism
B) Homeostasis
C) Adaptation
D) Reproduction
, Answer: B
Rationale: Homeostasis refers to the maintenance of a relatively stable internal
environment despite external changes. Metabolism (A) is the sum of all chemical
reactions .
Question 6
The smallest unit of an element that still retains the properties of that element is
the:
A) Molecule
B) Atom
C) Proton
D) Electron
Answer: B
Rationale: An atom is the fundamental unit of an element. Molecules (A) are two
or more atoms bonded together. Protons (C) and electrons (D) are subatomic
particles .
Question 7
Which subatomic particle has a positive charge and is located in the nucleus?
