WGU D312 ANATOMY AND PHYSIOLOGY I WITH LAB
OBJECTIVE ASSESSMENT (OA) COMPREHENSIVE
PRACTICE LATEST UPDATED 2026-2027 ACTUAL FINAL
EXAM WITH ALL POSSIBLE AND WELL ELABORATED
100 PRACTICE QUESTIONS AND 100% CORRECT
VERIFIED ANSWERS FULLY SOLVED PLUS DETAILED
RATIONALES INCLUDING EXPERT ANSWER KEY
(COMPLETE A+ SOLUTIONS) NEWLY UPDATED
VERSION FULL REVISED RATED A+ BRAND NEW!!!
Question 1
Which plane divides the body into unequal left and
right portions?
A. Midsagittal plane
B. Parasagittal plane
C. Coronal plane
D. Transverse plane
Correct Answer: B. Parasagittal plane
Rationale: A parasagittal plane runs vertically
parallel to the midline but divides the body into
,unequal left and right parts, unlike a midsagittal
plane which divides it into equal halves .
Question 2
The layer of the epidermis where mitosis occurs and
new cells are produced is the:
A. Stratum corneum
B. Stratum granulosum
C. Stratum basale
D. Stratum lucidum
Correct Answer: C. Stratum basale
Rationale: The stratum basale is the deepest
epidermal layer where stem cells divide to produce
new keratinocytes. The stratum corneum is the
outermost layer of dead cells.
Question 3
What is the role of the effector in a negative
feedback loop?
A. Detects changes in the variable
B. Compares the variable to a set point
C. Carries out the response to counteract the initial
,change
D. Amplifies the initial stimulus
Correct Answer: C. Carries out the response to
counteract the initial change
Rationale: The effector is the component that
executes the response to bring the variable back to
its normal range. Receptors detect changes, and the
control center compares to the set point.
Question 4
Which directional term means closer to the point of
attachment to the trunk?
A. Distal
B. Proximal
C. Medial
D. Lateral
Correct Answer: B. Proximal
Rationale: Proximal means nearer to the trunk or
point of origin. Distal means farther from the trunk.
Medial refers to the midline, and lateral refers to
the side.
, Question 5
Oxygen and carbon dioxide are exchanged across
respiratory membranes by which transport process?
A. Facilitated diffusion
B. Active transport
C. Simple diffusion
D. Osmosis
Correct Answer: C. Simple diffusion
Rationale: Gases like oxygen and carbon dioxide
move passively from high to low concentration
directly through the phospholipid bilayer without a
carrier or energy, which is simple diffusion .
Question 6
Which bone is part of the shoulder joint?
A. Clavicle
B. Radial
C. Ulna
D. Humerus
Correct Answer: D. Humerus
Rationale: The humerus and scapula articulate to
OBJECTIVE ASSESSMENT (OA) COMPREHENSIVE
PRACTICE LATEST UPDATED 2026-2027 ACTUAL FINAL
EXAM WITH ALL POSSIBLE AND WELL ELABORATED
100 PRACTICE QUESTIONS AND 100% CORRECT
VERIFIED ANSWERS FULLY SOLVED PLUS DETAILED
RATIONALES INCLUDING EXPERT ANSWER KEY
(COMPLETE A+ SOLUTIONS) NEWLY UPDATED
VERSION FULL REVISED RATED A+ BRAND NEW!!!
Question 1
Which plane divides the body into unequal left and
right portions?
A. Midsagittal plane
B. Parasagittal plane
C. Coronal plane
D. Transverse plane
Correct Answer: B. Parasagittal plane
Rationale: A parasagittal plane runs vertically
parallel to the midline but divides the body into
,unequal left and right parts, unlike a midsagittal
plane which divides it into equal halves .
Question 2
The layer of the epidermis where mitosis occurs and
new cells are produced is the:
A. Stratum corneum
B. Stratum granulosum
C. Stratum basale
D. Stratum lucidum
Correct Answer: C. Stratum basale
Rationale: The stratum basale is the deepest
epidermal layer where stem cells divide to produce
new keratinocytes. The stratum corneum is the
outermost layer of dead cells.
Question 3
What is the role of the effector in a negative
feedback loop?
A. Detects changes in the variable
B. Compares the variable to a set point
C. Carries out the response to counteract the initial
,change
D. Amplifies the initial stimulus
Correct Answer: C. Carries out the response to
counteract the initial change
Rationale: The effector is the component that
executes the response to bring the variable back to
its normal range. Receptors detect changes, and the
control center compares to the set point.
Question 4
Which directional term means closer to the point of
attachment to the trunk?
A. Distal
B. Proximal
C. Medial
D. Lateral
Correct Answer: B. Proximal
Rationale: Proximal means nearer to the trunk or
point of origin. Distal means farther from the trunk.
Medial refers to the midline, and lateral refers to
the side.
, Question 5
Oxygen and carbon dioxide are exchanged across
respiratory membranes by which transport process?
A. Facilitated diffusion
B. Active transport
C. Simple diffusion
D. Osmosis
Correct Answer: C. Simple diffusion
Rationale: Gases like oxygen and carbon dioxide
move passively from high to low concentration
directly through the phospholipid bilayer without a
carrier or energy, which is simple diffusion .
Question 6
Which bone is part of the shoulder joint?
A. Clavicle
B. Radial
C. Ulna
D. Humerus
Correct Answer: D. Humerus
Rationale: The humerus and scapula articulate to
