1
WGU D312 Anatomy and
Physiology Exam 1 (Latest
2025/2026 Update) 287 Actual
Exam Questions and Certified
Answers | 100% Correct | A Grade
Quiz_________________?
What quadrant includes the left lobe of the liver, stomach, pancreas, and portions of the small
and large intestines? -
Answer☑️
Left upper quadrant (LUQ)
Quiz_________________?
Which part of the plasma membrane binds a specific molecule outside the cell? -
Answer☑️
Receptor
A receptor is a type of recognition protein that can selectively bind a specific molecule outside
the cell, and this binding induces a chemical reaction within the cell.
Quiz_________________?
What does it mean if an anatomical structure is caudal? -
Answer☑️
If an anatomical structure is described as caudal, it means it is located towards the tail or lower
part of the body. In humans, this typically refers to a position closer to the feet or the lower
end of the spine.
, For example, the legs are caudal to the arms, meaning they are situated lower on the body
2
compared to the arms.
Quiz_________________?
What is the role of an effector in a negative feedback system? -
Answer☑️
In a negative feedback system, the effector plays a crucial role in maintaining homeostasis by
carrying out the response to a stimulus. Here's how it works:
Detection: A receptor detects a change in a physiological variable (e.g., temperature, blood
sugar levels).
Signal Processing: The control center (often the brain or endocrine glands) processes this
information and determines the appropriate response.
Action: The effector enacts the response to counteract the initial change and bring the variable
back to its set point.
For example, if your body temperature drops, the effector (such as muscles shivering)
generates heat to raise your body temperature back to normal.
Quiz_________________?
What is the correct order of the epidermis layer arranged from deep to superficial? -
Answer☑️
1. Stratum basale (or stratum germinativum)
2. Stratum spinosum
3. Stratum granulosum
4. Stratum lucidum (only present in thick skin, such as the palms and soles)
5. Stratum corneum
Quiz_________________?
Which skin layer contains Langerhans cells? -
Answer☑️
, Langerhans cells are primarily found in the stratum spinosum layer of the epidermis. These cells
3
play a key role in the skin's immune defense by acting as antigen-presenting cells, which help
detect and fight pathogens.
Quiz_________________?
Which degree of burn affects the underlying bones and muscles? -
Answer☑️
Fourth-degree burns are the most severe and affect not only all layers of the skin but also the
underlying bones, muscles, and tendons. These burns often appear charred or white and are
typically painless because the nerve endings are destroyed.
Quiz_________________?
Which part of the long bone has an epiphyseal line? -
Answer☑️
The epiphyseal line is located at the junction between the diaphysis (the shaft or central part of
the bone) and the epiphysis (the end part of the bone) in long bones. This line is a remnant of
the epiphyseal plate (growth plate) and indicates that the bone has completed its growth in
length.
Quiz_________________?
Which suture is present between the left and right parietal lobes? -
Answer☑️
The suture present between the left and right parietal lobes is the sagittal suture. This suture
runs along the midline of the skull, connecting the two parietal bones.
Quiz_________________?
Which two bones form the pectoral girdle? -
Answer☑️
The pectoral girdle, also known as the shoulder girdle, is formed by two bones: the clavicle
(collarbone) and the scapula (shoulder blade). These bones work together to connect the
upper limb to the axial skeleton and provide a wide range of motion for the shoulder and arm.
, 4
Quiz_________________?
What are the periodic invaginations in sarcolemma called? -
Answer☑️
The periodic invaginations in the sarcolemma are called T-tubules (transverse tubules). These
structures play a crucial role in conducting electrical impulses from the surface of the muscle
fiber to its interior, ensuring that the muscle contracts efficiently and uniformly.
Quiz_________________?
Which medially placed group of muscles is part of the erector spinae? -
Answer☑️
The spinalis muscles are the most medially placed group within the erector spinae muscle
group. These muscles are located closest to the spine and are responsible for extending and
laterally flexing the cervical and thoracic regions of the spine.
Quiz_________________?
Which thigh muscle is situated below the adductor longus? -
Answer☑️
The muscle situated below the adductor longus is the adductor magnus. This muscle is a large,
triangular muscle located in the medial compartment of the thigh and plays a significant role in
adducting and medially rotating the thigh
Quiz_________________?
What is the role of oligodendrocytes? -
Answer☑️
Oligodendrocytes play a crucial role in the central nervous system (CNS) by producing the
myelin sheath that insulates axons. This myelination is essential for the efficient transmission of
electrical impulses along nerve fibers, which helps in the rapid and coordinated communication
between neurons. Additionally, oligodendrocytes provide metabolic support to neurons and
contribute to maintaining a stable microenvironment within the CNS.
WGU D312 Anatomy and
Physiology Exam 1 (Latest
2025/2026 Update) 287 Actual
Exam Questions and Certified
Answers | 100% Correct | A Grade
Quiz_________________?
What quadrant includes the left lobe of the liver, stomach, pancreas, and portions of the small
and large intestines? -
Answer☑️
Left upper quadrant (LUQ)
Quiz_________________?
Which part of the plasma membrane binds a specific molecule outside the cell? -
Answer☑️
Receptor
A receptor is a type of recognition protein that can selectively bind a specific molecule outside
the cell, and this binding induces a chemical reaction within the cell.
Quiz_________________?
What does it mean if an anatomical structure is caudal? -
Answer☑️
If an anatomical structure is described as caudal, it means it is located towards the tail or lower
part of the body. In humans, this typically refers to a position closer to the feet or the lower
end of the spine.
, For example, the legs are caudal to the arms, meaning they are situated lower on the body
2
compared to the arms.
Quiz_________________?
What is the role of an effector in a negative feedback system? -
Answer☑️
In a negative feedback system, the effector plays a crucial role in maintaining homeostasis by
carrying out the response to a stimulus. Here's how it works:
Detection: A receptor detects a change in a physiological variable (e.g., temperature, blood
sugar levels).
Signal Processing: The control center (often the brain or endocrine glands) processes this
information and determines the appropriate response.
Action: The effector enacts the response to counteract the initial change and bring the variable
back to its set point.
For example, if your body temperature drops, the effector (such as muscles shivering)
generates heat to raise your body temperature back to normal.
Quiz_________________?
What is the correct order of the epidermis layer arranged from deep to superficial? -
Answer☑️
1. Stratum basale (or stratum germinativum)
2. Stratum spinosum
3. Stratum granulosum
4. Stratum lucidum (only present in thick skin, such as the palms and soles)
5. Stratum corneum
Quiz_________________?
Which skin layer contains Langerhans cells? -
Answer☑️
, Langerhans cells are primarily found in the stratum spinosum layer of the epidermis. These cells
3
play a key role in the skin's immune defense by acting as antigen-presenting cells, which help
detect and fight pathogens.
Quiz_________________?
Which degree of burn affects the underlying bones and muscles? -
Answer☑️
Fourth-degree burns are the most severe and affect not only all layers of the skin but also the
underlying bones, muscles, and tendons. These burns often appear charred or white and are
typically painless because the nerve endings are destroyed.
Quiz_________________?
Which part of the long bone has an epiphyseal line? -
Answer☑️
The epiphyseal line is located at the junction between the diaphysis (the shaft or central part of
the bone) and the epiphysis (the end part of the bone) in long bones. This line is a remnant of
the epiphyseal plate (growth plate) and indicates that the bone has completed its growth in
length.
Quiz_________________?
Which suture is present between the left and right parietal lobes? -
Answer☑️
The suture present between the left and right parietal lobes is the sagittal suture. This suture
runs along the midline of the skull, connecting the two parietal bones.
Quiz_________________?
Which two bones form the pectoral girdle? -
Answer☑️
The pectoral girdle, also known as the shoulder girdle, is formed by two bones: the clavicle
(collarbone) and the scapula (shoulder blade). These bones work together to connect the
upper limb to the axial skeleton and provide a wide range of motion for the shoulder and arm.
, 4
Quiz_________________?
What are the periodic invaginations in sarcolemma called? -
Answer☑️
The periodic invaginations in the sarcolemma are called T-tubules (transverse tubules). These
structures play a crucial role in conducting electrical impulses from the surface of the muscle
fiber to its interior, ensuring that the muscle contracts efficiently and uniformly.
Quiz_________________?
Which medially placed group of muscles is part of the erector spinae? -
Answer☑️
The spinalis muscles are the most medially placed group within the erector spinae muscle
group. These muscles are located closest to the spine and are responsible for extending and
laterally flexing the cervical and thoracic regions of the spine.
Quiz_________________?
Which thigh muscle is situated below the adductor longus? -
Answer☑️
The muscle situated below the adductor longus is the adductor magnus. This muscle is a large,
triangular muscle located in the medial compartment of the thigh and plays a significant role in
adducting and medially rotating the thigh
Quiz_________________?
What is the role of oligodendrocytes? -
Answer☑️
Oligodendrocytes play a crucial role in the central nervous system (CNS) by producing the
myelin sheath that insulates axons. This myelination is essential for the efficient transmission of
electrical impulses along nerve fibers, which helps in the rapid and coordinated communication
between neurons. Additionally, oligodendrocytes provide metabolic support to neurons and
contribute to maintaining a stable microenvironment within the CNS.
