Portage Learning BIOD 152 Lab 6 Exam **2026/2027** - 2026/2027 Official Exam
OBJECTIVE ASSESSMENT - EXAM
Portage Learning BIOD 152 Lab 6 Exam **2026/2027** -
2026/2027 Official Exam
50 100%
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
Digestive System Lab Nutrient Absorption
Gastrointestinal Anatomy Digestive System Pathology
Digestive Processes & Enzymes
COVER PAGE - 1
, SECTION 1 | Digestive System Lab | Q1-Q10 | Portage Learning BIOD 152 Lab 6 Exam **2026/2027** - 2026/2027 Official Exam 2026/2027
Q1 Question 1 of 50
A first-year anatomy student is preparing to examine a histology slide of jejunal tissue
under the compound light microscope. The lab manual instructs her to begin by locating
the finger-like projections of the mucosa at low power before increasing magnification.
Which objective lens magnification should she use first to identify the villi clearly?
A. 10x objective, giving a total magnification of 100x
B. 40x objective, giving a total magnification of 400x
C. 100x oil-immersion objective, giving a total magnification of 1000x
D. 4x scanning objective, giving a total magnification of 40x
Correct Answer: A
Rationale:
The 10x objective (total magnification 100x) is the standard low-power viewing lens used to locate and
orient structures such as villi on a histology slide before moving to higher magnification. The 40x
objective is used afterward for cellular detail, while the 100x oil-immersion lens requires immersion oil
and is reserved for bacteria or blood smears. The 4x scanning objective is too low to clearly resolve
individual villi on most tissue sections.
Q2 Question 2 of 50
During a fetal pig dissection lab, a student opens the abdominal cavity and must identify
the long, coiled tube running from the pyloric sphincter to the ileocecal valve. The
instructor asks her to measure and record the total length of this structure as it appears in
the specimen. Which tool and procedure should she use to obtain the most accurate
measurement?
A. A rigid wooden meter stick laid alongside the intact coil in place
B. A flexible cloth tape gently traced along the uncoiled tube after removing it from the
peritoneum
C. A caliper measuring only the outer diameter at three points
D. A digital scale recording the mass of the dissected segment
Correct Answer: B
Rationale:
A flexible cloth tape followed along the length of the small intestine after it has been gently uncoiled
yields the most accurate length measurement, because the organ is highly convoluted and cannot be
measured meaningfully in place. A rigid meter stick cannot follow the curves and would underestimate
length, while a caliper measures only diameter and a scale measures only mass. Length values reported
in lab manuals come from this tracing technique.
Portage Learning BIOD 152 Lab 6 Exam **2026/2027** - 2026/2027 Official Exam -- 2026/2027 | Passing Score: 80% | Page 2 of 27
, Q3 Question 3 of 50
A student is examining a stained section of the stomach wall under high power and is
asked to identify the cells that secrete hydrochloric acid. The lab manual indicates these
cells are located in the gastric pits and stain intensely pink with eosin due to their
abundant mitochondria. Which cell type should the student identify and record in his lab
notebook?
A. Parietal (oxyntic) cells
B. Chief (zymogenic) cells
C. Mucous neck cells
D. Enteroendocrine cells
Correct Answer: C
Rationale:
Parietal cells are the eosinophilic, mitochondria-rich cells of the gastric pits that secrete hydrochloric acid
and intrinsic factor, and they are the cells the student should identify. Chief cells secrete pepsinogen and
stain basophilic due to abundant rough endoplasmic reticulum, while mucous neck cells secrete mucus
and enteroendocrine cells release hormones such as gastrin. The intense pink eosin staining reflects the
parietal cell's high mitochondrial content needed for the proton pump.
Q4 Question 4 of 50
In a histology laboratory session, a student is comparing two unstained wet mounts of
cheek epithelial cells, one prepared with saline alone and the other treated with Lugol's
iodine solution. She observes that only the iodine-treated cells display dark brown
granules within the cytoplasm. What is the correct interpretation of her observation, and
how should she record it in her lab report?
A. The granules are starch from food residue stained by iodine, indicating a positive test for
complex carbohydrates
B. The granules are nuclei stained by iodine, indicating a positive test for DNA
C. The granules are lipid droplets stained by iodine, indicating a positive test for fats
D. The granules are protein aggregates stained by iodine, indicating a positive test for
enzymes
Correct Answer: D
Rationale:
Lugol's iodine stains starch a dark blue-black or brown color, so the granules the student observes are
most likely food-derived starch particles from the cheek cells, and she should record this as a positive
test for complex carbohydrates. Iodine does not stain nuclei, lipids, or proteins; nuclei are visualized with
dyes such as methylene blue or hematoxylin. The observation illustrates the specificity of iodine for
starch in lab demonstration slides.
Portage Learning BIOD 152 Lab 6 Exam **2026/2027** - 2026/2027 Official Exam -- 2026/2027 | Passing Score: 80% | Page 3 of 27
OBJECTIVE ASSESSMENT - EXAM
Portage Learning BIOD 152 Lab 6 Exam **2026/2027** -
2026/2027 Official Exam
50 100%
QUESTIONS VERIFIED ANSWERS EDITION
TOPICS COVERED
Digestive System Lab Nutrient Absorption
Gastrointestinal Anatomy Digestive System Pathology
Digestive Processes & Enzymes
COVER PAGE - 1
, SECTION 1 | Digestive System Lab | Q1-Q10 | Portage Learning BIOD 152 Lab 6 Exam **2026/2027** - 2026/2027 Official Exam 2026/2027
Q1 Question 1 of 50
A first-year anatomy student is preparing to examine a histology slide of jejunal tissue
under the compound light microscope. The lab manual instructs her to begin by locating
the finger-like projections of the mucosa at low power before increasing magnification.
Which objective lens magnification should she use first to identify the villi clearly?
A. 10x objective, giving a total magnification of 100x
B. 40x objective, giving a total magnification of 400x
C. 100x oil-immersion objective, giving a total magnification of 1000x
D. 4x scanning objective, giving a total magnification of 40x
Correct Answer: A
Rationale:
The 10x objective (total magnification 100x) is the standard low-power viewing lens used to locate and
orient structures such as villi on a histology slide before moving to higher magnification. The 40x
objective is used afterward for cellular detail, while the 100x oil-immersion lens requires immersion oil
and is reserved for bacteria or blood smears. The 4x scanning objective is too low to clearly resolve
individual villi on most tissue sections.
Q2 Question 2 of 50
During a fetal pig dissection lab, a student opens the abdominal cavity and must identify
the long, coiled tube running from the pyloric sphincter to the ileocecal valve. The
instructor asks her to measure and record the total length of this structure as it appears in
the specimen. Which tool and procedure should she use to obtain the most accurate
measurement?
A. A rigid wooden meter stick laid alongside the intact coil in place
B. A flexible cloth tape gently traced along the uncoiled tube after removing it from the
peritoneum
C. A caliper measuring only the outer diameter at three points
D. A digital scale recording the mass of the dissected segment
Correct Answer: B
Rationale:
A flexible cloth tape followed along the length of the small intestine after it has been gently uncoiled
yields the most accurate length measurement, because the organ is highly convoluted and cannot be
measured meaningfully in place. A rigid meter stick cannot follow the curves and would underestimate
length, while a caliper measures only diameter and a scale measures only mass. Length values reported
in lab manuals come from this tracing technique.
Portage Learning BIOD 152 Lab 6 Exam **2026/2027** - 2026/2027 Official Exam -- 2026/2027 | Passing Score: 80% | Page 2 of 27
, Q3 Question 3 of 50
A student is examining a stained section of the stomach wall under high power and is
asked to identify the cells that secrete hydrochloric acid. The lab manual indicates these
cells are located in the gastric pits and stain intensely pink with eosin due to their
abundant mitochondria. Which cell type should the student identify and record in his lab
notebook?
A. Parietal (oxyntic) cells
B. Chief (zymogenic) cells
C. Mucous neck cells
D. Enteroendocrine cells
Correct Answer: C
Rationale:
Parietal cells are the eosinophilic, mitochondria-rich cells of the gastric pits that secrete hydrochloric acid
and intrinsic factor, and they are the cells the student should identify. Chief cells secrete pepsinogen and
stain basophilic due to abundant rough endoplasmic reticulum, while mucous neck cells secrete mucus
and enteroendocrine cells release hormones such as gastrin. The intense pink eosin staining reflects the
parietal cell's high mitochondrial content needed for the proton pump.
Q4 Question 4 of 50
In a histology laboratory session, a student is comparing two unstained wet mounts of
cheek epithelial cells, one prepared with saline alone and the other treated with Lugol's
iodine solution. She observes that only the iodine-treated cells display dark brown
granules within the cytoplasm. What is the correct interpretation of her observation, and
how should she record it in her lab report?
A. The granules are starch from food residue stained by iodine, indicating a positive test for
complex carbohydrates
B. The granules are nuclei stained by iodine, indicating a positive test for DNA
C. The granules are lipid droplets stained by iodine, indicating a positive test for fats
D. The granules are protein aggregates stained by iodine, indicating a positive test for
enzymes
Correct Answer: D
Rationale:
Lugol's iodine stains starch a dark blue-black or brown color, so the granules the student observes are
most likely food-derived starch particles from the cheek cells, and she should record this as a positive
test for complex carbohydrates. Iodine does not stain nuclei, lipids, or proteins; nuclei are visualized with
dyes such as methylene blue or hematoxylin. The observation illustrates the specificity of iodine for
starch in lab demonstration slides.
Portage Learning BIOD 152 Lab 6 Exam **2026/2027** - 2026/2027 Official Exam -- 2026/2027 | Passing Score: 80% | Page 3 of 27
