BIOD 151: Modules 1–7 Practice Exam
QUESTIONS AND CORRECT DETAILED
ANSWERS 2025 (VERIFIED ANSWERS)
Module 1: Introduction to Anatomy and Physiology
- Which of the following best defines homeostasis?
- The ability of the body to perform digestion
- The tendency of the body to maintain a stable internal environment
- The process of breathing
- 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
- Which type of bond forms when electrons are shared between atoms?
- Ionic bond
- Covalent bond
- Hydrogen bond
- Metallic bond 1 / 4
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
- Which organelle is responsible for energy (ATP) production in the cell?
- Nucleus
- Golgi apparatus
- Mitochondrion
- Lysosome
Answer: C
Rationale: The mitochondrion is known as the "powerhouse" of the cell because it produces ATP through cellular respiration.
Module 4: Tissues
- Which tissue type forms the lining of organs and body cavities?
- Muscle tissue
- Nervous tissue
- Connective tissue
- 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
- Which layer of the skin contains blood vessels and sensory receptors?
- Epidermis
- Stratum corneum
- Hypodermis
- Dermis 2 / 4
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
- Which type of bone cell breaks down bone tissue?
- Osteoblast
- Osteocyte
- Osteoclast
- 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
- Which of the following describes a function of skeletal muscle?
- Pumping blood
- Peristalsis
- Generating heat
- Hormone secretion
Answer: C
Rationale: Skeletal muscles produce heat during contraction, helping to
maintain body temperature.
Mixed Review Questions
- Which feedback mechanism enhances or amplifies a change in the body?
- Negative feedback
- Positive feedback
- Neutral feedback
- Reflex arc 3 / 4
Answer: B
Rationale: Positive feedback intensifies a change, such as during childbirth or
blood clotting, until a specific outcome is achieved.
- Which macromolecule is the primary source of energy for the body?
- Protein
- Lipid
- Nucleic acid
- Carbohydrate
Answer: D
Rationale: Carbohydrates are broken down into glucose, which is the body’s
main source of energy, especially for the brain.
- What type of connective tissue stores fat?
- Areolar
- Adipose
- Dense regular
- Reticular
Answer: B
Rationale: Adipose tissue stores fat and provides insulation and cushioning for
the body.
- Which type of epithelial tissue is best suited for diffusion and filtration?
- Stratified squamous
- Simple cuboidal
- Simple squamous
- Transitional
Answer: C
Rationale: Simple squamous epithelium is thin and flat, allowing for efficient
diffusion and filtration across membranes.
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