WGU D312 ANATOMY & PHYSIOLOGY I EXAM 287
QUESTIONS WITH VERIFIED ANSWERS LATEST
Left upper quadrant (LUQ) - CORRECT ANSWER What quadrant includes the left
lobe of the liver, stomach, pancreas, and portions of the small and large
intestines?
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. - CORRECT ANSWER Which part of the plasma membrane binds a specific
molecule outside the cell?
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 compared to the arms. - CORRECT ANSWER What does it mean if an
anatomical structure is caudal?
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. -
CORRECT ANSWER What is the role of an effector in a negative feedback system?
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 - CORRECT ANSWER What is the correct order of the
epidermis layer arranged from deep to superficial?
Langerhans cells are primarily found in the stratum spinosum layer of the
epidermis. These cells play a key role in the skin's immune defense by acting as
antigen-presenting cells, which help detect and fight pathogens. - CORRECT
ANSWER Which skin layer contains Langerhans cells?
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. - CORRECT ANSWER Which degree of burn affects the underlying
bones and muscles?
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. - CORRECT ANSWER Which part
of the long bone has an epiphyseal line?
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.
- CORRECT ANSWER Which suture is present between the left and right parietal
lobes?
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. - CORRECT ANSWER Which two bones form
the pectoral girdle?
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. - CORRECT ANSWER What are the periodic
invaginations in sarcolemma called?
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. -
CORRECT ANSWER Which medially placed group of muscles is part of the erector
spinae?
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 -
CORRECT ANSWER Which thigh muscle is situated below the adductor longus?
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. - CORRECT ANSWER What
is the role of oligodendrocytes?
The membrane channel that opens due to physical distortion is the mechanically
gated channel. These channels respond to mechanical changes such as stretch,
pressure, or vibration and are crucial in sensory processes like touch and hearing. -
CORRECT ANSWER Which membrane channel is able to open due to a physical
distortion?
The nerve responsible for controlling the lifting of the upper eyelid is the
oculomotor nerve (cranial nerve III). It innervates the levator palpebrae superioris
muscle, which is essential for elevating the upper eyelid. - CORRECT ANSWER
Which nerve controls the lifting of the upper eyelid?
The posterior pituitary gland secretes two main hormones: oxytocin and
antidiuretic hormone (ADH), also known as vasopressin.
Oxytocin plays a crucial role in childbirth and lactation, stimulating uterine
contractions and milk ejection.
Antidiuretic hormone (ADH) helps regulate water balance in the body by
increasing water reabsorption in the kidneys. - CORRECT ANSWER Which
hormones are secreted from the posterior pituitary gland?
QUESTIONS WITH VERIFIED ANSWERS LATEST
Left upper quadrant (LUQ) - CORRECT ANSWER What quadrant includes the left
lobe of the liver, stomach, pancreas, and portions of the small and large
intestines?
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. - CORRECT ANSWER Which part of the plasma membrane binds a specific
molecule outside the cell?
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 compared to the arms. - CORRECT ANSWER What does it mean if an
anatomical structure is caudal?
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. -
CORRECT ANSWER What is the role of an effector in a negative feedback system?
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 - CORRECT ANSWER What is the correct order of the
epidermis layer arranged from deep to superficial?
Langerhans cells are primarily found in the stratum spinosum layer of the
epidermis. These cells play a key role in the skin's immune defense by acting as
antigen-presenting cells, which help detect and fight pathogens. - CORRECT
ANSWER Which skin layer contains Langerhans cells?
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. - CORRECT ANSWER Which degree of burn affects the underlying
bones and muscles?
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. - CORRECT ANSWER Which part
of the long bone has an epiphyseal line?
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.
- CORRECT ANSWER Which suture is present between the left and right parietal
lobes?
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. - CORRECT ANSWER Which two bones form
the pectoral girdle?
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. - CORRECT ANSWER What are the periodic
invaginations in sarcolemma called?
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. -
CORRECT ANSWER Which medially placed group of muscles is part of the erector
spinae?
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 -
CORRECT ANSWER Which thigh muscle is situated below the adductor longus?
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. - CORRECT ANSWER What
is the role of oligodendrocytes?
The membrane channel that opens due to physical distortion is the mechanically
gated channel. These channels respond to mechanical changes such as stretch,
pressure, or vibration and are crucial in sensory processes like touch and hearing. -
CORRECT ANSWER Which membrane channel is able to open due to a physical
distortion?
The nerve responsible for controlling the lifting of the upper eyelid is the
oculomotor nerve (cranial nerve III). It innervates the levator palpebrae superioris
muscle, which is essential for elevating the upper eyelid. - CORRECT ANSWER
Which nerve controls the lifting of the upper eyelid?
The posterior pituitary gland secretes two main hormones: oxytocin and
antidiuretic hormone (ADH), also known as vasopressin.
Oxytocin plays a crucial role in childbirth and lactation, stimulating uterine
contractions and milk ejection.
Antidiuretic hormone (ADH) helps regulate water balance in the body by
increasing water reabsorption in the kidneys. - CORRECT ANSWER Which
hormones are secreted from the posterior pituitary gland?
