1
BIOL251 Human Anatomy & Physiology I with Lab
Final Exam Actual Exam 2026/2027 – Complete
Exam-Style Questions with Detailed Rationales | 100%
Verified – Pass Guaranteed – A+ Graded
Module 1: Introduction, Homeostasis & Cells
Q1: When describing the relationship of the heart to the lungs, a student notes that the heart is
located "medial" to the lungs. What does this directional term mean in this context?
A. The heart is closer to the back (posterior) than the lungs.
B. The heart is closer to the midline of the body than the lungs.
C. The heart is inferior to the lungs.
D. The heart is on the outer side away from the midline compared to the lungs.
Correct Answer: B
Rationale: Medial refers to a position being closer to the midline of the body; since the heart is
centered between the lungs, it is indeed medial to them.
Q2: Which body cavity is protected by the thoracic cage (rib cage) and contains the heart and
lungs?
A. Abdominopelvic cavity
B. Dorsal cavity
C. Ventral cavity: Thoracic cavity
D. Cranial cavity
Correct Answer: C
Rationale: The thoracic cavity is the superior portion of the ventral cavity, enclosed by the ribs,
and houses the lungs and the heart (within the pericardial sac).
Q3: A patient is running a marathon and their body temperature is rising. To maintain
homeostasis, the body initiates sweating to cool down. What type of feedback loop is this, and
why?
,2
A. Positive feedback, because the response amplifies the stimulus (heat).
B. Positive feedback, because the body is trying to keep running.
C. Negative feedback, because the response (sweating) counteracts the stimulus (heat) to return
to set point.
D. Negative feedback, because the temperature is increasing.
Correct Answer: C
Rationale: This is a classic example of negative feedback because the body's response
(sweating/evaporative cooling) works to reverse or negate the initial stimulus (increased body
temperature) to restore balance.
Q4: Which organelle is the site of protein synthesis and contains ribosomes attached to its
membrane?
A. Smooth Endoplasmic Reticulum (SER)
B. Golgi Apparatus
C. Rough Endoplasmic Reticulum (RER)
D. Lysosome
Correct Answer: C
Rationale: The Rough Endoplasmic Reticulum is studded with ribosomes, which are the cellular
machinery responsible for translating mRNA into proteins.
Q5: If a cell lacks sufficient energy (ATP), which process involving the Sodium-Potassium Pump
would be immediately compromised?
A. The passive diffusion of oxygen into the cell.
B. The active transport of 3 Na+ out and 2 K+ in against their gradients.
C. The movement of water via osmosis.
D. The synthesis of lipids in the smooth ER.
Correct Answer: B
Rationale: The Sodium-Potassium Pump requires active transport, which uses ATP to move ions
against their concentration gradients; without ATP, this gradient maintenance fails.
,3
Q6: During cell division (mitosis), which phase is characterized by the alignment of
chromosomes at the cell's equator (metaphase plate)?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Correct Answer: B
Rationale: Metaphase is the specific stage where chromosomes line up single-file along the
center of the cell, preparing for separation in the next phase.
Q7: Which tissue type functions primarily to cover body surfaces, line body cavities, and form
glands?
A. Nervous tissue
B. Muscle tissue
C. Epithelial tissue
D. Connective tissue
Correct Answer: C
Rationale: Epithelial tissue acts as a protective barrier and is found on skin surfaces and lining
internal organs and cavities.
Q8: A solution with a pH of 2 is described as having a higher concentration of hydrogen ions
compared to a solution with a pH of 4. How much higher is the concentration?
A. 2 times higher
B. 10 times higher
C. 100 times higher
D. 1000 times higher
Correct Answer: C
, 4
Rationale: The pH scale is logarithmic; each whole number difference represents a tenfold
difference in ion concentration, so a difference of 2 (from 4 to 2) is
10×10=100
times.
Q9: What is the primary function of the Golgi Apparatus in the cell?
A. Synthesizing ATP
B. Modifying, sorting, and packaging proteins for secretion or delivery
C. Digesting waste materials
D. Containing the cell's DNA
Correct Answer: B
Rationale: The Golgi Apparatus acts as the "post office" of the cell, receiving proteins from the
RER, modifying them, and packaging them into vesicles for transport.
Q10: Which process describes the movement of water molecules across a selectively permeable
membrane from an area of low solute concentration to high solute concentration?
A. Diffusion
B. Active Transport
C. Osmosis
D. Facilitated Diffusion
Correct Answer: C
Rationale: Osmosis is the specific passive transport of water across a membrane driven by solute
concentration differences.
Q11: DNA replication occurs during which phase of the cell cycle?
A. Interphase (S phase)
B. Prophase
C. Cytokinesis
BIOL251 Human Anatomy & Physiology I with Lab
Final Exam Actual Exam 2026/2027 – Complete
Exam-Style Questions with Detailed Rationales | 100%
Verified – Pass Guaranteed – A+ Graded
Module 1: Introduction, Homeostasis & Cells
Q1: When describing the relationship of the heart to the lungs, a student notes that the heart is
located "medial" to the lungs. What does this directional term mean in this context?
A. The heart is closer to the back (posterior) than the lungs.
B. The heart is closer to the midline of the body than the lungs.
C. The heart is inferior to the lungs.
D. The heart is on the outer side away from the midline compared to the lungs.
Correct Answer: B
Rationale: Medial refers to a position being closer to the midline of the body; since the heart is
centered between the lungs, it is indeed medial to them.
Q2: Which body cavity is protected by the thoracic cage (rib cage) and contains the heart and
lungs?
A. Abdominopelvic cavity
B. Dorsal cavity
C. Ventral cavity: Thoracic cavity
D. Cranial cavity
Correct Answer: C
Rationale: The thoracic cavity is the superior portion of the ventral cavity, enclosed by the ribs,
and houses the lungs and the heart (within the pericardial sac).
Q3: A patient is running a marathon and their body temperature is rising. To maintain
homeostasis, the body initiates sweating to cool down. What type of feedback loop is this, and
why?
,2
A. Positive feedback, because the response amplifies the stimulus (heat).
B. Positive feedback, because the body is trying to keep running.
C. Negative feedback, because the response (sweating) counteracts the stimulus (heat) to return
to set point.
D. Negative feedback, because the temperature is increasing.
Correct Answer: C
Rationale: This is a classic example of negative feedback because the body's response
(sweating/evaporative cooling) works to reverse or negate the initial stimulus (increased body
temperature) to restore balance.
Q4: Which organelle is the site of protein synthesis and contains ribosomes attached to its
membrane?
A. Smooth Endoplasmic Reticulum (SER)
B. Golgi Apparatus
C. Rough Endoplasmic Reticulum (RER)
D. Lysosome
Correct Answer: C
Rationale: The Rough Endoplasmic Reticulum is studded with ribosomes, which are the cellular
machinery responsible for translating mRNA into proteins.
Q5: If a cell lacks sufficient energy (ATP), which process involving the Sodium-Potassium Pump
would be immediately compromised?
A. The passive diffusion of oxygen into the cell.
B. The active transport of 3 Na+ out and 2 K+ in against their gradients.
C. The movement of water via osmosis.
D. The synthesis of lipids in the smooth ER.
Correct Answer: B
Rationale: The Sodium-Potassium Pump requires active transport, which uses ATP to move ions
against their concentration gradients; without ATP, this gradient maintenance fails.
,3
Q6: During cell division (mitosis), which phase is characterized by the alignment of
chromosomes at the cell's equator (metaphase plate)?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Correct Answer: B
Rationale: Metaphase is the specific stage where chromosomes line up single-file along the
center of the cell, preparing for separation in the next phase.
Q7: Which tissue type functions primarily to cover body surfaces, line body cavities, and form
glands?
A. Nervous tissue
B. Muscle tissue
C. Epithelial tissue
D. Connective tissue
Correct Answer: C
Rationale: Epithelial tissue acts as a protective barrier and is found on skin surfaces and lining
internal organs and cavities.
Q8: A solution with a pH of 2 is described as having a higher concentration of hydrogen ions
compared to a solution with a pH of 4. How much higher is the concentration?
A. 2 times higher
B. 10 times higher
C. 100 times higher
D. 1000 times higher
Correct Answer: C
, 4
Rationale: The pH scale is logarithmic; each whole number difference represents a tenfold
difference in ion concentration, so a difference of 2 (from 4 to 2) is
10×10=100
times.
Q9: What is the primary function of the Golgi Apparatus in the cell?
A. Synthesizing ATP
B. Modifying, sorting, and packaging proteins for secretion or delivery
C. Digesting waste materials
D. Containing the cell's DNA
Correct Answer: B
Rationale: The Golgi Apparatus acts as the "post office" of the cell, receiving proteins from the
RER, modifying them, and packaging them into vesicles for transport.
Q10: Which process describes the movement of water molecules across a selectively permeable
membrane from an area of low solute concentration to high solute concentration?
A. Diffusion
B. Active Transport
C. Osmosis
D. Facilitated Diffusion
Correct Answer: C
Rationale: Osmosis is the specific passive transport of water across a membrane driven by solute
concentration differences.
Q11: DNA replication occurs during which phase of the cell cycle?
A. Interphase (S phase)
B. Prophase
C. Cytokinesis
