BIO 201 Midterm Exam Study Guide –
Actual Exam 2026/2027 100% Verified
Questions with Detailed Rationales | A+
Graded
This comprehensive study guide covers all essential topics for the BIO 201
Midterm Exam, including anatomy foundations, cellular biology, biochemistry,
membrane transport, histology, and the skeletal system . Each question includes a
verified correct answer and a detailed rationale to help you understand the
underlying concepts.
PART 1: FOUNDATIONS OF ANATOMY & PHYSIOLOGY
Q1. The study of the structure of body parts and their relationships to one
another is called:
A) Physiology
B) Histology
C) Anatomy
D) Cytology
✅ Correct Answer: C
Rationale: Anatomy is the study of the structure of body parts and their
relationships to one another. Physiology is the study of function. Histology is the
study of tissues, and cytology is the study of cells .
Q2. Which level of organization is the most complex?
A) Cellular level
B) Tissue level
,C) Organ level
D) Chemical level
✅ Correct Answer: C
Rationale: The levels of organization from simplest to most complex are:
chemical, cellular, tissue, organ, organ system, and organismal. Organs are
composed of multiple tissue types working together, making them more complex
than cells or tissues alone .
Q3. The directional term meaning "toward the midline of the body" is:
A) Lateral
B) Proximal
C) Medial
D) Distal
✅ Correct Answer: C
Rationale: Medial means toward the midline of the body. Lateral means away
from the midline. Proximal means closer to the point of attachment or trunk.
Distal means farther from the point of attachment or trunk .
Q4. Which body cavity contains the brain?
A) Thoracic cavity
B) Abdominal cavity
C) Cranial cavity
D) Pelvic cavity
✅ Correct Answer: C
Rationale: The cranial cavity (within the skull) contains the brain. The thoracic
cavity contains the heart and lungs. The abdominal cavity contains digestive
organs. The pelvic cavity contains reproductive and excretory organs .
, Q5. The plane that divides the body into anterior and posterior portions is the:
A) Sagittal plane
B) Midsagittal plane
C) Frontal (coronal) plane
D) Transverse plane
✅ Correct Answer: C
Rationale: The frontal (coronal) plane divides the body into anterior (front) and
posterior (back) portions. Sagittal planes divide into left and right. The transverse
plane divides into superior and inferior .
Q6. Which organ system is responsible for providing the body with oxygen and
removing carbon dioxide?
A) Cardiovascular system
B) Respiratory system
C) Digestive system
D) Nervous system
✅ Correct Answer: B
Rationale: The respiratory system (lungs, trachea, bronchi) performs gas
exchange—providing oxygen to the blood and removing carbon dioxide. The
cardiovascular system transports these gases .
Q7. The maintenance of a stable internal environment despite external changes
is called:
A) Metabolism
B) Homeostasis
C) Adaptation
D) Reproduction
✅ Correct Answer: B
Actual Exam 2026/2027 100% Verified
Questions with Detailed Rationales | A+
Graded
This comprehensive study guide covers all essential topics for the BIO 201
Midterm Exam, including anatomy foundations, cellular biology, biochemistry,
membrane transport, histology, and the skeletal system . Each question includes a
verified correct answer and a detailed rationale to help you understand the
underlying concepts.
PART 1: FOUNDATIONS OF ANATOMY & PHYSIOLOGY
Q1. The study of the structure of body parts and their relationships to one
another is called:
A) Physiology
B) Histology
C) Anatomy
D) Cytology
✅ Correct Answer: C
Rationale: Anatomy is the study of the structure of body parts and their
relationships to one another. Physiology is the study of function. Histology is the
study of tissues, and cytology is the study of cells .
Q2. Which level of organization is the most complex?
A) Cellular level
B) Tissue level
,C) Organ level
D) Chemical level
✅ Correct Answer: C
Rationale: The levels of organization from simplest to most complex are:
chemical, cellular, tissue, organ, organ system, and organismal. Organs are
composed of multiple tissue types working together, making them more complex
than cells or tissues alone .
Q3. The directional term meaning "toward the midline of the body" is:
A) Lateral
B) Proximal
C) Medial
D) Distal
✅ Correct Answer: C
Rationale: Medial means toward the midline of the body. Lateral means away
from the midline. Proximal means closer to the point of attachment or trunk.
Distal means farther from the point of attachment or trunk .
Q4. Which body cavity contains the brain?
A) Thoracic cavity
B) Abdominal cavity
C) Cranial cavity
D) Pelvic cavity
✅ Correct Answer: C
Rationale: The cranial cavity (within the skull) contains the brain. The thoracic
cavity contains the heart and lungs. The abdominal cavity contains digestive
organs. The pelvic cavity contains reproductive and excretory organs .
, Q5. The plane that divides the body into anterior and posterior portions is the:
A) Sagittal plane
B) Midsagittal plane
C) Frontal (coronal) plane
D) Transverse plane
✅ Correct Answer: C
Rationale: The frontal (coronal) plane divides the body into anterior (front) and
posterior (back) portions. Sagittal planes divide into left and right. The transverse
plane divides into superior and inferior .
Q6. Which organ system is responsible for providing the body with oxygen and
removing carbon dioxide?
A) Cardiovascular system
B) Respiratory system
C) Digestive system
D) Nervous system
✅ Correct Answer: B
Rationale: The respiratory system (lungs, trachea, bronchi) performs gas
exchange—providing oxygen to the blood and removing carbon dioxide. The
cardiovascular system transports these gases .
Q7. The maintenance of a stable internal environment despite external changes
is called:
A) Metabolism
B) Homeostasis
C) Adaptation
D) Reproduction
✅ Correct Answer: B
