BIOD 151: Modules 1–7 Practice Exam
QUESTIONS AND CORRECT DETAILED
ANSWERS 2025 (VERIFIED ANSWERS)
Module 1: Introduction to Anatomy and Physiology
1. Which of the following best defines homeostasis?
A. The ability of the body to perform digestion
B. The tendency of the body to maintain a stable internal environment
C. The process of breathing
D. The study of disease
Answer: B
Rationale: Homeostasis refers to the body's ability to maintain a stable internal
environment despite external changes. This is essential for normal body
function.
Module 2: Chemistry of Life
2. Which type of bond forms when electrons are shared between atoms?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Metallic bond
,Answer: B
Rationale: A covalent bond is formed when two atoms share one or more pairs
of electrons, allowing them to achieve stability.
Module 3: Cells
3. Which organelle is responsible for energy (ATP) production in the cell?
A. Nucleus
B. Golgi apparatus
C. Mitochondrion
D. Lysosome
Answer: C
Rationale: The mitochondrion is known as the "powerhouse" of the cell because
it produces ATP through cellular respiration.
Module 4: Tissues
4. Which tissue type forms the lining of organs and body cavities?
A. Muscle tissue
B. Nervous tissue
C. Connective tissue
D. Epithelial tissue
Answer: D
Rationale: Epithelial tissue covers body surfaces and lines cavities and hollow
organs, providing protection, secretion, and absorption.
Module 5: The Integumentary System
5. Which layer of the skin contains blood vessels and sensory receptors?
A. Epidermis
B. Stratum corneum
C. Hypodermis
D. Dermis
,Answer: D
Rationale: The dermis lies beneath the epidermis and contains connective
tissue, blood vessels, nerve endings, and sensory receptors.
Module 6: The Skeletal System
6. Which type of bone cell breaks down bone tissue?
A. Osteoblast
B. Osteocyte
C. Osteoclast
D. Chondrocyte
Answer: C
Rationale: Osteoclasts are responsible for bone resorption, breaking down bone
matrix and releasing calcium into the blood.
Module 7: The Muscular System
7. Which of the following describes a function of skeletal muscle?
A. Pumping blood
B. Peristalsis
C. Generating heat
D. Hormone secretion
Answer: C
Rationale: Skeletal muscles produce heat during contraction, helping to
maintain body temperature.
Mixed Review Questions
8. Which feedback mechanism enhances or amplifies a change in the body?
A. Negative feedback
B. Positive feedback
C. Neutral feedback
D. Reflex arc
, Answer: B
Rationale: Positive feedback intensifies a change, such as during childbirth or
blood clotting, until a specific outcome is achieved.
9. Which macromolecule is the primary source of energy for the body?
A. Protein
B. Lipid
C. Nucleic acid
D. Carbohydrate
Answer: D
Rationale: Carbohydrates are broken down into glucose, which is the body’s
main source of energy, especially for the brain.
10. What type of connective tissue stores fat?
A. Areolar
B. Adipose
C. Dense regular
D. Reticular
Answer: B
Rationale: Adipose tissue stores fat and provides insulation and cushioning for
the body.
11. Which type of epithelial tissue is best suited for diffusion and filtration?
A. Stratified squamous
B. Simple cuboidal
C. Simple squamous
D. Transitional
Answer: C
Rationale: Simple squamous epithelium is thin and flat, allowing for efficient
diffusion and filtration across membranes.
QUESTIONS AND CORRECT DETAILED
ANSWERS 2025 (VERIFIED ANSWERS)
Module 1: Introduction to Anatomy and Physiology
1. Which of the following best defines homeostasis?
A. The ability of the body to perform digestion
B. The tendency of the body to maintain a stable internal environment
C. The process of breathing
D. The study of disease
Answer: B
Rationale: Homeostasis refers to the body's ability to maintain a stable internal
environment despite external changes. This is essential for normal body
function.
Module 2: Chemistry of Life
2. Which type of bond forms when electrons are shared between atoms?
A. Ionic bond
B. Covalent bond
C. Hydrogen bond
D. Metallic bond
,Answer: B
Rationale: A covalent bond is formed when two atoms share one or more pairs
of electrons, allowing them to achieve stability.
Module 3: Cells
3. Which organelle is responsible for energy (ATP) production in the cell?
A. Nucleus
B. Golgi apparatus
C. Mitochondrion
D. Lysosome
Answer: C
Rationale: The mitochondrion is known as the "powerhouse" of the cell because
it produces ATP through cellular respiration.
Module 4: Tissues
4. Which tissue type forms the lining of organs and body cavities?
A. Muscle tissue
B. Nervous tissue
C. Connective tissue
D. Epithelial tissue
Answer: D
Rationale: Epithelial tissue covers body surfaces and lines cavities and hollow
organs, providing protection, secretion, and absorption.
Module 5: The Integumentary System
5. Which layer of the skin contains blood vessels and sensory receptors?
A. Epidermis
B. Stratum corneum
C. Hypodermis
D. Dermis
,Answer: D
Rationale: The dermis lies beneath the epidermis and contains connective
tissue, blood vessels, nerve endings, and sensory receptors.
Module 6: The Skeletal System
6. Which type of bone cell breaks down bone tissue?
A. Osteoblast
B. Osteocyte
C. Osteoclast
D. Chondrocyte
Answer: C
Rationale: Osteoclasts are responsible for bone resorption, breaking down bone
matrix and releasing calcium into the blood.
Module 7: The Muscular System
7. Which of the following describes a function of skeletal muscle?
A. Pumping blood
B. Peristalsis
C. Generating heat
D. Hormone secretion
Answer: C
Rationale: Skeletal muscles produce heat during contraction, helping to
maintain body temperature.
Mixed Review Questions
8. Which feedback mechanism enhances or amplifies a change in the body?
A. Negative feedback
B. Positive feedback
C. Neutral feedback
D. Reflex arc
, Answer: B
Rationale: Positive feedback intensifies a change, such as during childbirth or
blood clotting, until a specific outcome is achieved.
9. Which macromolecule is the primary source of energy for the body?
A. Protein
B. Lipid
C. Nucleic acid
D. Carbohydrate
Answer: D
Rationale: Carbohydrates are broken down into glucose, which is the body’s
main source of energy, especially for the brain.
10. What type of connective tissue stores fat?
A. Areolar
B. Adipose
C. Dense regular
D. Reticular
Answer: B
Rationale: Adipose tissue stores fat and provides insulation and cushioning for
the body.
11. Which type of epithelial tissue is best suited for diffusion and filtration?
A. Stratified squamous
B. Simple cuboidal
C. Simple squamous
D. Transitional
Answer: C
Rationale: Simple squamous epithelium is thin and flat, allowing for efficient
diffusion and filtration across membranes.
