WGU D312 Anatomy And Physiology I
OA Practice Exam 2 QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2025
1. Which plane divides the body into anterior and posterior parts?
A. Transverse
B. Sagittal
C. Frontal
D. Oblique
The frontal (coronal) plane divides the body into front (anterior) and
back (posterior) sections.
2. What is the basic structural and functional unit of life?
A. Tissue
B. Cell
C. Organ
, D. Atom
Cells are the smallest units that carry out all life processes.
3. Which organelle is responsible for producing ATP?
A. Nucleus
B. Ribosome
C. Mitochondrion
D. Golgi apparatus
Mitochondria are the "powerhouses" of the cell, generating ATP
through cellular respiration.
4. The elbow is ______ to the wrist.
A. Distal
B. Proximal
C. Inferior
D. Superficial
Proximal means closer to the point of attachment or the trunk of the
body.
5. Which type of connective tissue stores fat?
A. Areolar
B. Adipose
C. Dense regular
D. Reticular
Adipose tissue is a loose connective tissue that stores energy in fat
cells.
,6. The function of simple squamous epithelium is:
A. Absorption
B. Protection
C. Diffusion and filtration
D. Contraction
Its thinness allows for efficient diffusion and filtration in lungs and
capillaries.
7. Which type of muscle is involuntary and striated?
A. Skeletal
B. Cardiac
C. Smooth
D. Voluntary
Cardiac muscle is striated like skeletal but involuntary like smooth
muscle.
8. The major function of the integumentary system is:
A. Movement
B. Absorption
C. Protection
D. Circulation
It forms a barrier to protect the body from mechanical damage,
pathogens, and dehydration.
9. Which layer of the skin contains blood vessels?
A. Epidermis
, B. Dermis
C. Stratum corneum
D. Keratin
The dermis contains blood vessels, nerves, and other structures.
10. What is the primary function of melanin?
A. Aid digestion
B. Produce sweat
C. Protect against UV radiation
D. Provide elasticity to the skin
Melanin absorbs harmful ultraviolet radiation from sunlight.
11. Which bone is part of the axial skeleton?
A. Femur
B. Sternum
C. Pelvis
D. Scapula
The sternum is a central component of the thoracic cage in the axial
skeleton.
12. Osteocytes are found in:
A. Cartilage
B. Bone
C. Tendons
D. Ligaments
Osteocytes are mature bone cells that maintain bone tissue.
OA Practice Exam 2 QUESTIONS AND
CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2025
1. Which plane divides the body into anterior and posterior parts?
A. Transverse
B. Sagittal
C. Frontal
D. Oblique
The frontal (coronal) plane divides the body into front (anterior) and
back (posterior) sections.
2. What is the basic structural and functional unit of life?
A. Tissue
B. Cell
C. Organ
, D. Atom
Cells are the smallest units that carry out all life processes.
3. Which organelle is responsible for producing ATP?
A. Nucleus
B. Ribosome
C. Mitochondrion
D. Golgi apparatus
Mitochondria are the "powerhouses" of the cell, generating ATP
through cellular respiration.
4. The elbow is ______ to the wrist.
A. Distal
B. Proximal
C. Inferior
D. Superficial
Proximal means closer to the point of attachment or the trunk of the
body.
5. Which type of connective tissue stores fat?
A. Areolar
B. Adipose
C. Dense regular
D. Reticular
Adipose tissue is a loose connective tissue that stores energy in fat
cells.
,6. The function of simple squamous epithelium is:
A. Absorption
B. Protection
C. Diffusion and filtration
D. Contraction
Its thinness allows for efficient diffusion and filtration in lungs and
capillaries.
7. Which type of muscle is involuntary and striated?
A. Skeletal
B. Cardiac
C. Smooth
D. Voluntary
Cardiac muscle is striated like skeletal but involuntary like smooth
muscle.
8. The major function of the integumentary system is:
A. Movement
B. Absorption
C. Protection
D. Circulation
It forms a barrier to protect the body from mechanical damage,
pathogens, and dehydration.
9. Which layer of the skin contains blood vessels?
A. Epidermis
, B. Dermis
C. Stratum corneum
D. Keratin
The dermis contains blood vessels, nerves, and other structures.
10. What is the primary function of melanin?
A. Aid digestion
B. Produce sweat
C. Protect against UV radiation
D. Provide elasticity to the skin
Melanin absorbs harmful ultraviolet radiation from sunlight.
11. Which bone is part of the axial skeleton?
A. Femur
B. Sternum
C. Pelvis
D. Scapula
The sternum is a central component of the thoracic cage in the axial
skeleton.
12. Osteocytes are found in:
A. Cartilage
B. Bone
C. Tendons
D. Ligaments
Osteocytes are mature bone cells that maintain bone tissue.
