WGU D312 Anatomy and Physiology I
with Lab OA Practice Exam QUESTIONS
AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2025
1. Which of the following is the basic structural and functional unit of
life?
A. Organelle
B. Tissue
C. Cell
D. Organ
Cells are the smallest unit that can carry out all the processes of life,
including metabolism, growth, and reproduction.
2. Which body system is responsible for producing blood cells?
A. Muscular system
B. Nervous system
C. Skeletal system
, D. Endocrine system
The skeletal system houses bone marrow, which produces red blood
cells, white blood cells, and platelets.
3. What term describes the body's ability to maintain a stable internal
environment?
A. Metabolism
B. Adaptation
C. Evolution
D. Homeostasis
Homeostasis refers to the body's regulation of its internal
environment to remain stable despite external changes.
4. Which directional term means "away from the midline"?
A. Medial
B. Lateral
C. Proximal
D. Superficial
Lateral means further from the midline of the body.
5. The heart is located in which body cavity?
A. Cranial
B. Abdominal
C. Thoracic
D. Pelvic
The thoracic cavity houses the lungs and heart.
,6. Which plane divides the body into right and left halves?
A. Transverse
B. Sagittal
C. Coronal
D. Frontal
The sagittal plane divides the body vertically into right and left parts.
7. What is the function of the mitochondria?
A. Protein synthesis
B. Energy production
C. Storage of genetic material
D. Packaging of proteins
Mitochondria are known as the "powerhouse" of the cell, producing
ATP through cellular respiration.
8. The skin is part of which body system?
A. Muscular
B. Integumentary
C. Nervous
D. Endocrine
The integumentary system includes the skin, hair, nails, and glands.
9. Which type of tissue contracts to produce movement?
A. Nervous
B. Epithelial
C. Muscle
, D. Connective
Muscle tissue can contract, enabling movement of the body and
internal organs.
10. Which organ is primarily responsible for filtering blood and
forming urine?
A. Liver
B. Spleen
C. Bladder
D. Kidney
The kidneys filter blood and form urine to excrete waste.
11. Which of the following is a function of the plasma membrane?
A. ATP production
B. DNA replication
C. Regulates passage of substances
D. Protein synthesis
The plasma membrane controls what enters and exits the cell.
12. Which macromolecule is made of amino acids?
A. Lipid
B. Carbohydrate
C. Protein
D. Nucleic acid
Proteins are polymers made from amino acid monomers.
with Lab OA Practice Exam QUESTIONS
AND CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2025
1. Which of the following is the basic structural and functional unit of
life?
A. Organelle
B. Tissue
C. Cell
D. Organ
Cells are the smallest unit that can carry out all the processes of life,
including metabolism, growth, and reproduction.
2. Which body system is responsible for producing blood cells?
A. Muscular system
B. Nervous system
C. Skeletal system
, D. Endocrine system
The skeletal system houses bone marrow, which produces red blood
cells, white blood cells, and platelets.
3. What term describes the body's ability to maintain a stable internal
environment?
A. Metabolism
B. Adaptation
C. Evolution
D. Homeostasis
Homeostasis refers to the body's regulation of its internal
environment to remain stable despite external changes.
4. Which directional term means "away from the midline"?
A. Medial
B. Lateral
C. Proximal
D. Superficial
Lateral means further from the midline of the body.
5. The heart is located in which body cavity?
A. Cranial
B. Abdominal
C. Thoracic
D. Pelvic
The thoracic cavity houses the lungs and heart.
,6. Which plane divides the body into right and left halves?
A. Transverse
B. Sagittal
C. Coronal
D. Frontal
The sagittal plane divides the body vertically into right and left parts.
7. What is the function of the mitochondria?
A. Protein synthesis
B. Energy production
C. Storage of genetic material
D. Packaging of proteins
Mitochondria are known as the "powerhouse" of the cell, producing
ATP through cellular respiration.
8. The skin is part of which body system?
A. Muscular
B. Integumentary
C. Nervous
D. Endocrine
The integumentary system includes the skin, hair, nails, and glands.
9. Which type of tissue contracts to produce movement?
A. Nervous
B. Epithelial
C. Muscle
, D. Connective
Muscle tissue can contract, enabling movement of the body and
internal organs.
10. Which organ is primarily responsible for filtering blood and
forming urine?
A. Liver
B. Spleen
C. Bladder
D. Kidney
The kidneys filter blood and form urine to excrete waste.
11. Which of the following is a function of the plasma membrane?
A. ATP production
B. DNA replication
C. Regulates passage of substances
D. Protein synthesis
The plasma membrane controls what enters and exits the cell.
12. Which macromolecule is made of amino acids?
A. Lipid
B. Carbohydrate
C. Protein
D. Nucleic acid
Proteins are polymers made from amino acid monomers.
