BIOL251 Human Anatomy & Physiology
I w/Lab Final Exam Review | 150
Original Practice Questions
Question 1
A patient's core body temperature rises to 40°C during a febrile illness. Which
component of a homeostatic control system is responsible for detecting this
deviation from the set point?
A. Effector
B. Control center
C. Receptor
D. Afferent pathway
Correct Answer: C
Explanation: Receptors are sensory structures that monitor the internal
environment and detect deviations from the set point, sending input to the
control center via afferent pathways. Clinical pearl: Fever reflects a reset
hypothalamic set point, not receptor failure.
Question 2
Which directional term correctly describes the relationship of the stomach to the
spinal column?
A. Posterior
B. Anterior
C. Superior
D. Lateral
,Correct Answer: B
Explanation: The stomach lies anterior (ventral) to the spinal column. Best
practice: Always confirm anatomical position (palms forward, standing upright)
before applying directional terminology.
Question 3
A researcher studying how prolonged bed rest affects bone density is investigating
which level of structural organization?
A. Cellular
B. Tissue
C. Organ system
D. Chemical
Correct Answer: C
Explanation: Bone density changes reflect interactions among skeletal, muscular,
and endocrine systems, illustrating the organ system level. Analysis: Homeostatic
disruption at one level propagates across levels.
Question 4
Which body cavity subdivision contains the heart and lungs?
A. Abdominopelvic cavity
B. Dorsal cavity
C. Thoracic cavity
D. Cranial cavity
Correct Answer: C
Explanation: The thoracic cavity houses the heart (mediastinum) and lungs
(pleural cavities). Recall: The diaphragm separates thoracic from abdominopelvic
cavities.
,Question 5
During a marathon, a runner's sweat glands activate to dissipate heat. In this
negative feedback loop, the sweat glands function as:
A. Receptors
B. Control centers
C. Effectors
D. Afferent neurons
Correct Answer: C
Explanation: Effectors are muscles or glands that produce a response to restore
the set point. Application: Sweat glands enact the cooling response commanded
by the hypothalamic control center.
Question 6
A CT scan reveals a tumor located in the left upper abdominal quadrant. Which
organ is most likely involved?
A. Cecum
B. Spleen
C. Gallbladder
D. Appendix
Correct Answer: B
Explanation: The spleen lies in the left upper quadrant; the cecum, gallbladder,
and appendix reside in the right quadrants. Clinical pearl: LUQ pain with splenic
enlargement may refer to the left shoulder via the phrenic nerve.
Question 7
Which plane divides the body into equal right and left halves?
, A. Frontal plane
B. Transverse plane
C. Midsagittal plane
D. Oblique plane
Correct Answer: C
Explanation: The midsagittal (median) plane passes through the midline, creating
equal right and left halves. Understanding: Parasagittal planes create unequal
halves.
Question 8
Which statement best illustrates positive feedback?
A. Insulin lowering blood glucose
B. Shivering raising body temperature
C. Oxytocin intensifying uterine contractions
D. Vasodilation reducing body heat
Correct Answer: C
Explanation: Positive feedback amplifies the initial stimulus; oxytocin-driven labor
contractions are the classic example. Analysis: Positive feedback is rare and
typically self-limiting, not homeostatic long-term.
Question 9
A patient reports pain "in the pit of the stomach." Using surface anatomy, this
region corresponds to the:
A. Epigastric region
B. Hypogastric region
C. Right iliac region
D. Left lumbar region
I w/Lab Final Exam Review | 150
Original Practice Questions
Question 1
A patient's core body temperature rises to 40°C during a febrile illness. Which
component of a homeostatic control system is responsible for detecting this
deviation from the set point?
A. Effector
B. Control center
C. Receptor
D. Afferent pathway
Correct Answer: C
Explanation: Receptors are sensory structures that monitor the internal
environment and detect deviations from the set point, sending input to the
control center via afferent pathways. Clinical pearl: Fever reflects a reset
hypothalamic set point, not receptor failure.
Question 2
Which directional term correctly describes the relationship of the stomach to the
spinal column?
A. Posterior
B. Anterior
C. Superior
D. Lateral
,Correct Answer: B
Explanation: The stomach lies anterior (ventral) to the spinal column. Best
practice: Always confirm anatomical position (palms forward, standing upright)
before applying directional terminology.
Question 3
A researcher studying how prolonged bed rest affects bone density is investigating
which level of structural organization?
A. Cellular
B. Tissue
C. Organ system
D. Chemical
Correct Answer: C
Explanation: Bone density changes reflect interactions among skeletal, muscular,
and endocrine systems, illustrating the organ system level. Analysis: Homeostatic
disruption at one level propagates across levels.
Question 4
Which body cavity subdivision contains the heart and lungs?
A. Abdominopelvic cavity
B. Dorsal cavity
C. Thoracic cavity
D. Cranial cavity
Correct Answer: C
Explanation: The thoracic cavity houses the heart (mediastinum) and lungs
(pleural cavities). Recall: The diaphragm separates thoracic from abdominopelvic
cavities.
,Question 5
During a marathon, a runner's sweat glands activate to dissipate heat. In this
negative feedback loop, the sweat glands function as:
A. Receptors
B. Control centers
C. Effectors
D. Afferent neurons
Correct Answer: C
Explanation: Effectors are muscles or glands that produce a response to restore
the set point. Application: Sweat glands enact the cooling response commanded
by the hypothalamic control center.
Question 6
A CT scan reveals a tumor located in the left upper abdominal quadrant. Which
organ is most likely involved?
A. Cecum
B. Spleen
C. Gallbladder
D. Appendix
Correct Answer: B
Explanation: The spleen lies in the left upper quadrant; the cecum, gallbladder,
and appendix reside in the right quadrants. Clinical pearl: LUQ pain with splenic
enlargement may refer to the left shoulder via the phrenic nerve.
Question 7
Which plane divides the body into equal right and left halves?
, A. Frontal plane
B. Transverse plane
C. Midsagittal plane
D. Oblique plane
Correct Answer: C
Explanation: The midsagittal (median) plane passes through the midline, creating
equal right and left halves. Understanding: Parasagittal planes create unequal
halves.
Question 8
Which statement best illustrates positive feedback?
A. Insulin lowering blood glucose
B. Shivering raising body temperature
C. Oxytocin intensifying uterine contractions
D. Vasodilation reducing body heat
Correct Answer: C
Explanation: Positive feedback amplifies the initial stimulus; oxytocin-driven labor
contractions are the classic example. Analysis: Positive feedback is rare and
typically self-limiting, not homeostatic long-term.
Question 9
A patient reports pain "in the pit of the stomach." Using surface anatomy, this
region corresponds to the:
A. Epigastric region
B. Hypogastric region
C. Right iliac region
D. Left lumbar region
