1
A&P 1 101 LAB EXAM 8 CUMULATIVE FINAL LAB
PRACTICAL 2026/2027 | Portage Learning | Already Graded
A | 100% Correct | Pass Guaranteed
Section 1: Microscope & Histology Review (Q1-15)
Q1. When using the compound light microscope in the laboratory, you observe a
specimen using the 40x objective lens. If the ocular lens has a standard magnification
of 10x, what is the total magnification of the image?
A. 40x
B. 140x
C. 400x [CORRECT]
D. 1000x
Rationale: Total magnification is calculated by multiplying the ocular lens
magnification (10x) by the objective lens magnification (40x), yielding 400x. Distractor
D represents oil immersion (100x objective), while A represents only the objective
magnification without the ocular.
Correct Answer: C
Q2. During a histology lab exercise, a student switches from the 10x objective to the
100x oil immersion objective and notices the field of view is blurry despite being in
focus at lower magnifications. What is the correct sequence of adjustments to resolve
this issue?
A. Adjust the coarse focus knob, then increase the light intensity using the iris
diaphragm
B. Apply immersion oil, use only the fine focus knob, and ensure the condenser is
properly raised and iris diaphragm is open [CORRECT]
C. Switch back to 40x, refocus with coarse adjustment, then return to 100x without oil
D. Remove the slide, clean the lens with lens paper, and restart at 4x magnification
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Rationale: At 100x oil immersion, the working distance is extremely short; coarse
focus would crash the lens into the slide. Immersion oil matches the refractive index
between the lens and specimen, fine focus provides minute adjustments, and proper
condenser/lighting (Köhler illumination) is essential. Option A risks lens damage,
while C and D ignore the fundamental requirement for immersion oil and condenser
adjustment.
Correct Answer: B
Q3. A student observes that when switching from the 4x objective to the 40x
objective, the field of view becomes significantly smaller and darker. Which
statement best explains the relationship between total magnification, field of view,
and depth of focus?
A. As magnification increases, field of view and depth of focus both increase
proportionally
B. As magnification increases, field of view decreases while depth of focus also
decreases [CORRECT]
C. As magnification increases, field of view increases while depth of focus decreases
D. Field of view and depth of focus remain constant regardless of magnification
changes
Rationale: Higher magnification objectives have narrower fields of view and shallower
depths of focus because they resolve smaller areas with greater detail. This is a
fundamental optical principle of compound microscopy that students must master
for efficient slide scanning and multi-layer tissue observation.
Correct Answer: B
Q4. While examining a prepared slide at 400x total magnification, a student notices
that only the upper layer of cells appears sharp while deeper layers appear fuzzy.
Which microscope adjustment will maximize the clarity of structures at different
depths within the tissue section?
,3
A. Rotate the nosepiece to the 10x objective to increase depth of focus
B. Adjust the fine focus knob slightly to scan through different focal planes
[CORRECT]
C. Close the iris diaphragm completely to increase contrast at all depths
D. Move the condenser downward to increase the working distance
Rationale: Scanning through focal planes by adjusting the fine focus knob allows the
observer to visualize structures at different depths within a thick tissue section. While
closing the iris diaphragm (C) increases contrast and depth of focus slightly, it does
not allow visualization of different depth planes, and switching to 10x (A) sacrifices
the necessary magnification.
Correct Answer: B
Q5. DIAGRAM-BASED IDENTIFICATION: Examine the photomicrograph showing a
tissue section from the alveoli of the lung. The tissue consists of a single layer of
extremely thin, flattened cells with flattened nuclei. Identify this epithelial tissue.
A. Simple cuboidal epithelium
B. Simple squamous epithelium [CORRECT]
C. Stratified squamous epithelium
D. Pseudostratified ciliated columnar epithelium
Rationale: The single layer of flattened cells with flattened nuclei is diagnostic of
simple squamous epithelium, optimized for diffusion and filtration in alveoli and
capillaries. Distractor B (simple cuboidal) would show cube-shaped cells, while D
(pseudostratified) would show nuclei at varying heights and cilia, typical of
respiratory passages rather than alveoli.
Correct Answer: B
Q6. DIAGRAM-BASED IDENTIFICATION: A kidney tubule slide viewed at 400x shows
a single layer of roughly square-shaped cells with centrally located spherical nuclei
and a clear lumen. Identify this epithelial tissue type.
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A. Simple columnar epithelium
B. Stratified cuboidal epithelium
C. Simple squamous epithelium
D. Simple cuboidal epithelium [CORRECT]
Rationale: Simple cuboidal epithelium is characterized by a single layer of cube-
shaped cells with central, round nuclei and is the primary lining of kidney tubules and
glandular ducts. The square profile in cross-section and central nucleus distinguish it
from the flattened simple squamous (C) and the taller simple columnar (A) with basal
nuclei.
Correct Answer: D
Q7. A histology slide from the small intestine shows a single layer of tall, narrow cells
with oval nuclei positioned near the basal membrane. The apical surface displays a
dense brush border of microvilli, and scattered goblet cells are visible. Identify this
epithelial tissue.
A. Pseudostratified ciliated columnar epithelium
B. Stratified columnar epithelium
C. Simple columnar epithelium [CORRECT]
D. Transitional epithelium
Rationale: Simple columnar epithelium lines the digestive tract and is defined by a
single layer of tall cells with basal nuclei, microvilli for absorption, and interspersed
goblet cells for mucus secretion. Pseudostratified (A) would show nuclei at varying
heights and cilia rather than microvilli, while transitional (D) is stratified and found in
the urinary system.
Correct Answer: C
Q8. A slide from the trachea shows epithelial tissue with nuclei appearing at various
heights, giving a false stratified appearance, but all cells contact the basement
A&P 1 101 LAB EXAM 8 CUMULATIVE FINAL LAB
PRACTICAL 2026/2027 | Portage Learning | Already Graded
A | 100% Correct | Pass Guaranteed
Section 1: Microscope & Histology Review (Q1-15)
Q1. When using the compound light microscope in the laboratory, you observe a
specimen using the 40x objective lens. If the ocular lens has a standard magnification
of 10x, what is the total magnification of the image?
A. 40x
B. 140x
C. 400x [CORRECT]
D. 1000x
Rationale: Total magnification is calculated by multiplying the ocular lens
magnification (10x) by the objective lens magnification (40x), yielding 400x. Distractor
D represents oil immersion (100x objective), while A represents only the objective
magnification without the ocular.
Correct Answer: C
Q2. During a histology lab exercise, a student switches from the 10x objective to the
100x oil immersion objective and notices the field of view is blurry despite being in
focus at lower magnifications. What is the correct sequence of adjustments to resolve
this issue?
A. Adjust the coarse focus knob, then increase the light intensity using the iris
diaphragm
B. Apply immersion oil, use only the fine focus knob, and ensure the condenser is
properly raised and iris diaphragm is open [CORRECT]
C. Switch back to 40x, refocus with coarse adjustment, then return to 100x without oil
D. Remove the slide, clean the lens with lens paper, and restart at 4x magnification
,2
Rationale: At 100x oil immersion, the working distance is extremely short; coarse
focus would crash the lens into the slide. Immersion oil matches the refractive index
between the lens and specimen, fine focus provides minute adjustments, and proper
condenser/lighting (Köhler illumination) is essential. Option A risks lens damage,
while C and D ignore the fundamental requirement for immersion oil and condenser
adjustment.
Correct Answer: B
Q3. A student observes that when switching from the 4x objective to the 40x
objective, the field of view becomes significantly smaller and darker. Which
statement best explains the relationship between total magnification, field of view,
and depth of focus?
A. As magnification increases, field of view and depth of focus both increase
proportionally
B. As magnification increases, field of view decreases while depth of focus also
decreases [CORRECT]
C. As magnification increases, field of view increases while depth of focus decreases
D. Field of view and depth of focus remain constant regardless of magnification
changes
Rationale: Higher magnification objectives have narrower fields of view and shallower
depths of focus because they resolve smaller areas with greater detail. This is a
fundamental optical principle of compound microscopy that students must master
for efficient slide scanning and multi-layer tissue observation.
Correct Answer: B
Q4. While examining a prepared slide at 400x total magnification, a student notices
that only the upper layer of cells appears sharp while deeper layers appear fuzzy.
Which microscope adjustment will maximize the clarity of structures at different
depths within the tissue section?
,3
A. Rotate the nosepiece to the 10x objective to increase depth of focus
B. Adjust the fine focus knob slightly to scan through different focal planes
[CORRECT]
C. Close the iris diaphragm completely to increase contrast at all depths
D. Move the condenser downward to increase the working distance
Rationale: Scanning through focal planes by adjusting the fine focus knob allows the
observer to visualize structures at different depths within a thick tissue section. While
closing the iris diaphragm (C) increases contrast and depth of focus slightly, it does
not allow visualization of different depth planes, and switching to 10x (A) sacrifices
the necessary magnification.
Correct Answer: B
Q5. DIAGRAM-BASED IDENTIFICATION: Examine the photomicrograph showing a
tissue section from the alveoli of the lung. The tissue consists of a single layer of
extremely thin, flattened cells with flattened nuclei. Identify this epithelial tissue.
A. Simple cuboidal epithelium
B. Simple squamous epithelium [CORRECT]
C. Stratified squamous epithelium
D. Pseudostratified ciliated columnar epithelium
Rationale: The single layer of flattened cells with flattened nuclei is diagnostic of
simple squamous epithelium, optimized for diffusion and filtration in alveoli and
capillaries. Distractor B (simple cuboidal) would show cube-shaped cells, while D
(pseudostratified) would show nuclei at varying heights and cilia, typical of
respiratory passages rather than alveoli.
Correct Answer: B
Q6. DIAGRAM-BASED IDENTIFICATION: A kidney tubule slide viewed at 400x shows
a single layer of roughly square-shaped cells with centrally located spherical nuclei
and a clear lumen. Identify this epithelial tissue type.
, 4
A. Simple columnar epithelium
B. Stratified cuboidal epithelium
C. Simple squamous epithelium
D. Simple cuboidal epithelium [CORRECT]
Rationale: Simple cuboidal epithelium is characterized by a single layer of cube-
shaped cells with central, round nuclei and is the primary lining of kidney tubules and
glandular ducts. The square profile in cross-section and central nucleus distinguish it
from the flattened simple squamous (C) and the taller simple columnar (A) with basal
nuclei.
Correct Answer: D
Q7. A histology slide from the small intestine shows a single layer of tall, narrow cells
with oval nuclei positioned near the basal membrane. The apical surface displays a
dense brush border of microvilli, and scattered goblet cells are visible. Identify this
epithelial tissue.
A. Pseudostratified ciliated columnar epithelium
B. Stratified columnar epithelium
C. Simple columnar epithelium [CORRECT]
D. Transitional epithelium
Rationale: Simple columnar epithelium lines the digestive tract and is defined by a
single layer of tall cells with basal nuclei, microvilli for absorption, and interspersed
goblet cells for mucus secretion. Pseudostratified (A) would show nuclei at varying
heights and cilia rather than microvilli, while transitional (D) is stratified and found in
the urinary system.
Correct Answer: C
Q8. A slide from the trachea shows epithelial tissue with nuclei appearing at various
heights, giving a false stratified appearance, but all cells contact the basement
