4th Histology Lecture Exam - Skin, GIT, and Accessory Organs (Batch 2025) Flashcards
- The epidermis is lined by which type of epithelium?
A. Stratified columnar epithelium
B. Keratinized stratified squamous epithelium
C. Non-keratinized simple squamous epithelium
D. Simple columnar epithelium
Keratinized stratified squamous epithelium
Epidermis –
Epithelial Tissue Layer (*Stratified Squamous Keratinized ET); Ectodermal in origin.
Dermis – Connective Tissue Layer.
Papillary: Loose (Areolar) CT;
Reticular: Dense Irregular CT. *Both Fibrous.
Hypodermis/ Subcutaneous Tissue – Not part of the skin
Loose CT w/ Adipocytes
- This epidermal layer is seen only in palms and soles
A. Stratum spinosum
B. Stratum corneum
C. Stratum basale
D. Stratum lucidum
Stratum lucidum
CLG-SB (Thick Skin)
S. corneum: Dead Keratinocytes
S. lucidum: Dead Keratinocytes
S. granulosum: Keratohyaline (apoptosis)
S. spinosum: Langerhans/ Dendritic Cells (APC/Macrophage)
S. basale: Stem cells/Merkel cells/ Melanocytes
- This layer is composed of cuboidal cells
A. Stratum granulosum
B. Stratum corneum
C. Stratum basale
D. Stratum spinosum
Stratum basale
S. corneum: Flattened Squamous Keratinocytes
S. lucidum: - Flattened
Granular/ S. granulosum: Flattened
Spinous/ S. spinosum: Polyhedral cells w/ central nuclei
Basal/ S. basale : Cuboidal/ Columnar cells
- These epidermal cells are mechanoreceptors for light touch
A. Keratinocytes
B.Langerhan cells
C.Merkel cells
D.Melanocytes
Merkel cells
- This gland is dependent on sex hormones
A. Eccrine Sweat gland
B. Pacinian corpuscle
C. Apocrine sweat gland
D. Meissner corpuscle
Apocrine sweat gland
Dermal Appendages (Reticular Dermis)
Sweat Gland:
Simple Coiled Tubular: Eccrine (Merocrine), Apocrine
Sebaceous Glands:
Compound Acinar (Grape-like Structure)
Hair Follicle:
Dead Keratizined Epithelial Cell
- Mostly found in the perineum and axillary regions
A. Meissner corpuscle
B. Pacinian corpuscle
C. Apocrine sweat gland
D. Eccrine Sweat gland
Apocrine sweat gland
Location: Axilla, Areola, Perianal, Genital Area
- This sweat gland is most numerous on the soles
A. Eccrine Sweat gland
B. Pacinian corpuscle
C. Meissner corpuscle
D. Apocrine sweat gland
Eccrine Sweat gland
- Its outer capsule is made up of flattened Schwann cells
A. Apocrine sweat gland
B. Eccrine Sweat gland
C. Pacinian corpuscle
D. Meissner corpuscle
Pacinian corpuscle
Uncapsulated:
Merkel cells: each associated with expanded nerve
endings
Free nerve endings: in the papillary dermis and extending into lower epidermal layers
Root hair plexuses: a web of sensory ibers surrounding the bases of hair follicles in the reticular dermis that detects movements of the hairs.
Encapsulated
Meissner corpuscles are elliptical structures, 30-75
μm by 50-150 μm, consisting of sensory axons winding
among lattened Schwann cells arranged perpendicular
to the epidermis in the dermal papillae
Lamellated (pacinian) corpuscles are large oval struc-
tures, approximately 0.5 mm by 1 mm, found deep in the
reticular dermis and hypodermis, with an outer capsule
and 15-50 thin, concentric lamellae of lattened Schwann
cells and collagen surrounding a highly branched, unmy-
elinated axon .
Krause end bulbs are simpler encapsulated, ovoid
structures, with extremely thin, collagenous capsules
penetrated by a sensory iber.
Ruffini corpuscles have collagenous, fusiform capsules
anchored irmly to the surrounding connective tissue
- Receptor for low frequency vibration
A. Meissner corpuscle
B. Apocrine sweat gland
C. Pacinian corpuscle
D. Eccrine Sweat gland
Meissner corpuscle
- This structure has adrenergic innervation
A. Apocrine sweat gland
B. Eccrine Sweat gland
C. Meissner corpuscle
D. Pacinian corpuscle
Apocrine sweat gland
Sweat Gland:
Eccrine (Merocrine) Sweat Gland
-Release sweat to adjust body temperature (**Exocytosis)
Apocrine Sweat Gland
-Respond to stress and sexual stimulation (*Release on hair follicle).
-Influenced by hormones; Seen in axilla, areola, perianal and genital area.
-Contains fatty acids (That gives distinctive body odor).
- Which layer of the epidermis contains keratohyaline granules?
A. Stratum corneum
B. Stratum spinosum
C. Stratum granulosum
D. Stratum corneum
Stratum granulosum
S. corneum: Dead Keratinocytes
S. lucidum: Dead Keratinocytes
S. granulosum: Keratohyaline (apoptosis)
S. spinosum: Langerhans/ Dendritic Cells (APC/Macrophage)
S. basale: Stem cells/Merkel cells/ Melanocytes
- Which of the following cells are antigen presenting cells found in the skin?
A. Pacinian corpuscle
B. Merkel cells
C. Kupffer cells
D. Langerhan cells
Langerhan cells
S. corneum: Dead Keratinocytes
S. lucidum: Dead Keratinocytes
S. granulosum: Keratohyaline (apoptosis)
S. spinosum: Langerhans/ Dendritic Cells (APC/Macrophage)
S. basale: Stem cells/Merkel cells/ Melanocytes
- A new skin product is said to boost collagen production. Which of the cells is its target?
A. Merkel cells
B. Keratinocyte
C. Melanocyte
D. Fibroblast
Fibroblast
Fibroblast:
-Produces Collagen and Elastic Fibers
- Which is the growing part of the nail?
A. Matrix
B. Root
C. Nail bed
D. Lunula
Matrix
- Which of the following is the most abundant receptor of the skin
A. Pacinian corpuscles
B. Ruffini’s corpuscle
C. Free nerve endings
D. Krause’s end bulb
Free nerve endings
- Where is thick skin found?
A. Palms
B. Back
C. Knees
D. Nape
Palms
- It is a thin layer composed of loose connective tissue
A. None
B. Both
C. Papillary layer of the dermis
D. Reticular layer of the dermis
Papillary layer of the dermis
- Responsible for the elasticity of the skin
A. Both
B. None
C. Reticular layer of the dermis
D. Papillary layer of the dermis
Reticular layer of the dermis
- Contains fibroblasts, mast cells and leukocytes
A. Reticular layer of the dermis
B. None
C. Papillary layer of the dermis
D. Reticular layer of the dermis
Papillary layer of the dermis
- Contains numerous keratinocytes
A. Papillary layer of the dermis
B. Both
C. None
D. Reticular layer of the dermis
None
- This is the outermost epithelial cell layer without nuclei or organelles
A. Stratum lucidum
B. Stratum corneum
C. Stratum granulosum
D. Stratum basale
Stratum corneum
- This epidermal cell is responsible for skin pigmentation
A. Melanocyte
B. Keratinocyte
C. Merkel cell
D. Langerhan cell
Melanocyte
- Which cell is found on the dermis?
A. Fibroblast
B. Melanocyte
C. Keratinocyte
D. Collagen
Fibroblast
- Which of the following responds to pain?
A. Free nerve endings
B. Ruffini’s corpuscle
C. Krause’s end bulbs
D. Meissner’s corpuscle
Free nerve endings
- What is the correct term of cuticle?
A. Eponychium
B. Root
C. Lunula
D. Nail bed
Eponychium
- Which is not considered as an epidermal appendage?
A. Nail
B. Hair
C. Hypodermis
D. Sebaceous gland
Hypodermis
Epidermal appendage
Sweat Gland, Sebacceous Gland, Hair Follicle, Nails
- This epidermal layer is composed of numerous cell layers which appears pointy
A. Stratum spinosum
B. Stratum basale
C. Stratum germinativum
D. Stratum lucidum
Stratum spinosum
- Layers of the Epidermis:
THICK SKIN (Top to bottom)
S. corneum, S. lucidum, S. granulosum, S. spinosum, S. basale.
- Which layer is on the surface of the skin?
A. Stratum spinosum
B. Stratum lucidum
C. Stratum basale
D. Stratum corneum
Stratum corneum
- Layers of the Epidermis:
THICK SKIN (Top to bottom)
S. corneum, S. lucidum, S. granulosum, S. spinosum, S. basale/germinativum
- What type of glands are the glands of Moll?
A. Apocrine sweat gland
B. Endocrine gland
C. Eccrine sweat gland
D. Sebaceous gland
Apocrine sweat gland
The ciliary glands (glands of Moll) are modified apocrine sweat glands that are found on the margin of the eyelid.
They are next to the base of the eyelashes, and anterior to the Meibomian glands within the distal eyelid margin. These glands are relatively large and tubular-shaped, and secrete lipid that adds to the superficial layer of the tear film, retarding evaporation.
- Which is the receptor of fine touch?
A. Free nerve endings
B. Ruffini’s corpuscle
C. Meissner’s corpuscle
D. Krause’s end bulbs
Meissner’s corpuscle
Receptors
Merkel’s cells: light touch
Meissner corpuscle: low frequency vibration/ fine touch
Free nerve endings: pain
- Which of the following statements regarding the esophagus is correct?
A. Lined with non-keratinized simple squamous epithelium
B. It is entirely covered with adventitia
C. Distal 1/3 is made up of skeletal muscle
D. Mucus secreting glands are found in the lamina propia and submucosa
Mucus secreting glands are found in the lamina propia and submucosa
Submucosa:
o Dense Irregular Collagenous Tissue; Blood Vessels, Nerves, Lymphatic Vessels.
o Meissner’s Plexuses (Submucosal Nerve Plexuses) – Function: Secretion.
o Deep Esophageal Glands (Esophageal Glands Proper).
- Which one is specific for duodenum?
A. Brunner’s gland
B. Intestinal gland
C. Crypts of Lieberkuhn
D. Lacteals
Brunner’s gland
- What do you call the **neuroendocrine cells **found at the lamina propia of the GIT?
A. Argentaffin cells
B. Kulchitsky cells
C. Paneth cells
D. Goblet cells
Argentaffin cells
Enteroendocrine (Endrocrine, Argentaffin) Cells – Scattered epithelial cells in the gastric mucosa with endocrine or paracrine functions.
* In Fundus – Secretes: Serotonin – Inhibits gastric acid secretion, stimulates production and release of gastric mucus.
* In Pylorus (Antrum) – Produces: Gastrin (G-Cell) – Stimulates secretion of acid and pepsinogen.
- Gastrin is produced in which of the following?
A. Body
B. Fundus
C. Antrum
D. Pylorus
Antrum
Enteroendocrine (Endrocrine, Argentaffin) Cells – Scattered epithelial cells in the gastric mucosa with endocrine or paracrine functions.
* In Fundus – Secretes: Serotonin – Inhibits gastric acid secretion, stimulates production and release of gastric mucus.
* In Pylorus (Antrum) – Produces: Gastrin (G-Cell) – Stimulates secretion of acid and pepsinogen.
- Which cell types is most prevalent within the gastric pit of the stomach?
A. Mucus secreting cells
B. Parietal cells
C. Columnar absortive cells
D. Paneth cells
Mucus secreting cells
- Hyperacidity of the stomach is due to hypersecretion of which cell?
A. Mucous neck cell
B. Columnar cell
C. Parietal cell
D. Zymogenic cell
Parietal cell
- Which of these cells will manifest Pernicious anemia if destroyed?
A. Absorptive cells
B. Paneth cells
C. Parietal cells
D. Goblet cells
Parietal cells
- In the GIT, the cells that secrete antibacterial enzymes are found in which of the following?
A. Crypts of Lieberkuhn
B. Lamina propia
C. Payer’s patch
D. Intestinal villi
Crypts of Lieberkuhn
- Plica circularis is a feature of which of the following?
A. Esophagus
B. Stomach
C. Small intestine
D. Large intestine
Small intestine
- Which of the following would result to a reduced number of Paneth cells?
A. Decreased mucus secretion
B. Increased intestinal fats
C. Reduced sugar breakdown
D. Increased intestinal bacteria
Increased intestinal bacteria
- Which one penetrates the core of **intestinal villus **with microvasculature and lymphatics?
A. Intestinal glands
B. Smooth muscle
C. Epithelium
D. Lacteals
Lacteals
- Which one is the primary function of lacteals?
A. Absorption of salts
B. Absorption of chylomicron
C. Absorption of water
D. Absorption of amino acid
Absorption of chylomicron
Chylomicrons are transferred to the lateral cell membrane, secreted by exocytosis, and flow into the extracellular space in the direction of the lamina propria, where most enter the lymph in lacteals (4).
- Villi are longest in which part of the GIT?
A. Ileum
B. Stomach
C. Jejunum
D. Duodenum
Duodenum
- The mineralized tissue that covers the roots of the tooth is which of the following?
A. Crown
B. Cementum
C. Dentin
D. Enamel
Cementum
Cementum covers the dentin of the root and resembles bone, but it is avascular. It is thickest around the root tip where cementocytes reside in lacunae with processes in canaliculi, especially near the cementum surface.
- Which is the collagenous fibrous tissue that holds a tooth to an alveolar socket?
A. Dental pulp
B. Sharpey’s fibers
C. Tome’s fibers
D. Periondontal ligament
Periondontal ligament
- What digestive phase involves enzymes to break the food into smaller molecules for absorption in the circulation?
A. Absorption
B. Ingestion
C. Fragmentation
D. Digestion
Digestion
- Which layer of the digestive tract is rich in macrophages and lymphoid cells?
A. Muscularis mucosa
B. Submucosa
C. Lamina propia
D. Mucus membrane
Lamina propia
- Which one is associated with an incompetent barrier at the gastroesophageal junction due to a decrease lower esophageal sphincteric tone?
A. Gastroesophageal reflux
B. Esophageal varices
C. Esophageal ulcer
D. Reflux esophagitis
Gastroesophageal reflux
- Which process occurs as a result of the action of pancreatic lipase and bile?
A. Lipid digestion
B. Protein absorption
C. Release of amino acid
D. Carbohydrate breakdown
Lipid digestion
- The fibers of the outer longitudinal layer that congregate in thick longitudinal bands of the large intestine is which of the following?
A. Appendices epiploicae
B. Haustration
C. Columns of Morgagni
D. Teniae coli
Teniae coli
- This substance produced by the serous demilunes of the submandibular gland to hydrolyze the walls of bacteria is which of the following?
A. Lysozyme
B. Mucin
C. Lactoferrin
D. Immunoglobulin
Lysozyme
- Which of the following drains bile from the hepatocytes to the bile duct?
A. Portal triad
B. Classic hepatic lobule
C. Portal lobule
D. Portal acinus
Portal lobule
- The part of the digestive tract that involves mechanical processing through muscular contractions is which of the following?
A. Large intestines
B. Stomach
C. Small intestines
D. Pharynx
Stomach
- The elongated cells located in the taste bud which extends from the base to the taste pore is which of the following?
A. Basal cells
B. Microvilli
C. Neuroepithelial (taste) cells
D. Sustentacular cells
Neuroepithelial (taste) cells
- Which one exhibits a broader and taller mushroom-like shape papilla?
A. Filiform
B. Circumvallate
C. Foliate
D. Fungiform
Fungiform
- Tongue – Muscular Organ Covered with Mucosa (Stratified Squamous).
o LE has folds (Papilla).
o Filiform: Pointed.
o Fungiform: Mushroom.
o Foliate: Shallow, Longitudinal.
o Circumvallate: Largest, Burried.
- Which cell secretes an uncalcified predentin?
A. Odontoblast
B. Granular layer (of Tomes)
C. Ameloblast
D. Cementocytes
Odontoblast
- The muscular layer consisting of smooth muscle cells that forms the lower esophageal is found in which of the following?
A. Lamina propria near the stomach
B. Distal end of the esophagus
C. Midportion of the esophagus
D. Proximal end of the esophagus
Distal end of the esophagus
Tunica Muscularis (Muscularis Externa): Inner Circular & Outer Longitudinal.
Layer:
Upper (PROXIMAL) 1/3: Skeletal Muscle.
Middle 1/3: Smooth & Skeletal Muscle.
Lower (DISTAL)1/3: Smooth Muscle.
- In the digestive system, which one is characterized by aggregations of Peyer patches?
A. Duodenum
B. Jejunum
C. Stomach
D. Ileum
Ileum
- Which one secretes acid glycoproteins that protects the mucosal lining?
A. APUD cells
B. Fundic glands
C. Goblet cells
D. Parietal cells
Goblet cells
- Which condition is marked by atrophy of the intestinal mucosa caused by infections or nutritional deficiencies?
A. Duodenal ulcer
B. Malignancy
C. Gastritis
D. Malabsorption syndrome
Malabsorption syndrome
- Which of the following mucosal forms extend through muscularis mucosa?
A. Gastric glands
B. Brunner’s gland
C. Crypts of Lieberkhun
D. Pyloric gland
Brunner’s gland
- Which cell is not found in the neck of the gastric gland?
A. Stem cells
B. Parietal cells
C. Neuroendocrine cells
D. Mucous neck cells
Neuroendocrine cells
- Which one is the pepsin-secreting cell?
A. Stem cell
B. Parietal cell
C. Zymogenic cell
D. Mucous neck cell
Zymogenic cell
- Which one inhibits the release of other hormones in the stomach?
A. Gastrin
B. Somatostatin
C. HCl
D. Glucagon
Somatostatin
- Which one functions to increase the area of contact between the intestinal surface and nutrients?
A. Microvilli
B. Lamina propia
C. Enterocytes
D. Serosa
Microvilli
- Exocrine product of liver
A. Cholecystokinin
B. Lipase
C. Bile
D. Secretin
E. Trypsin
Bile
- The following structures are contained in the portal canal, EXCEPT:
A. br. of portal vein
B. central vein
C. none of these
D. bile ductule
E. br. of hepatic artery
central vein
- This structural organization of the liver has the branches of the hepatic artery at the periphery:
A. Classical lobule
B. Centroacinar
C. Hepatic acini
D. All of these
E. Portal lobule
Classical lobule
- This lobule arrangement is consistent with other exocrine glands:
A. Portal lobule
B. Classical lobule
C. All of these
D. Centroacinar
E. Hepatic acini
Portal lobule
- Site of primary function of hepatic circulation:
A. Peribiliary plexus
B. Capillaries
C. None of these
D. Sinusoids
E. Terminal portal venules
Sinusoids
- Which is the zone found at the center of the hepatic acinus?
A. Zone of permanent repose
B. Zone of varying activity
C. None of these
D. Zonula adherens
E. Zone of permanent function
Zone of permanent repose
- The portal triad is at the center of this hepatic structural organization:
A. Hepatic acini
B. Portal lobule
C. Zone of permanent function
D. Zone of permanent repose
E. Classical lobule
Portal lobule
- Drainage system of the liver:
A. Sinusoids
B. Portal vein
C. Hepatic artery
D. Hepatic vein
E. Bile canaliculi
Hepatic vein
- The portal vein supplies this much blood to the liver:
A. 90%
B. 15-25%
C. 70-80%
D. 30-50%
E. 55-65%
70-80%
- Functional unit of liver:
A. Hepatocyte
B. Acini
C. Sinusoid
D. Bile canaliculi
E. Classical lobule
B. Acini
- The following statements regarding Kupffer cells are TRUE, EXCEPT:
A. They possess villous projections called vermiform bodies.
B. None of these (All are TRUE)
C. They are usually situated on the endothelium.
D. Majority of the cell’s surface is exposed to sinusoidal blood.
E. There is abundance of lysosomes, Golgi complexes and RER’s in the cytoplasm.
None of these (All are TRUE)
- This is the most abundant cell in the liver:
A. Kupffer cell
B. Hepatocyte
C. Endothelial cell
D. Fat-storing cell
E. Pit cell
Hepatocyte
- These cells possess short pseudopods and are non-phagocytic:
A. Interstitial cell
B. Fat-storing cell
C. Kupffer cell
D. Endothelial cell
E. Pit cell
Pit cell
- Which statement regarding the Space of Disse is FALSE?
A. None of these (All are TRUE).
B. Collagen fibrils and unmyelinated nerve axons are found in it.
C. It is occupied by a true ground substance.
D. It lies between the sinusoid lining and hepatocyte.
E. Plasma is free to move around this space.
It is occupied by a true ground substance.
- The following substance in the hepatocyte cytoplasm appear as rosettes or dense aggregates when seen under the electron microscope:
A. Glycogen
B. Smooth endoplasmic reticulum
C. Ribosomes
D. Lipids
E. Reticular fibers
Glycogen
- TRUE of the hepatocyte, EXCEPT:
A. It is polyhedral, having 6 or more sides.
B. The smooth endoplasmic reticulum assumes branched and anastomosing sections.
C. It is binucleate in 75% of cases.
D. Ribosomes in the RER is responsible for the basophilic cytoplasm.
E. None of these (All are TRUE)
It is binucleate in 75% of cases.
- TRUE of the bile cannaliculi, EXCEPT:
A. Possesses short microvilli directed at the lumen.
B. Has no walls.
C. Lumen is a mere expansion of the intercellular space.
D. None of these (All are TRUE)
E. Occluding junctions prevent escape of bile into intercellular cleft.
None of these (All are TRUE)
- Terminal most branch of the biliary tree:
A. cholangioles
B. bile cannaliculi
C. portal canal
D. bile ducts
E. bile ductules
bile cannaliculi
- Muscles first appear in this segment of the biliary tree:
A. interlobular bile ducts
B. bile cannaliculi
C. hepatic duct
D. cystic duct
E. common bile duct
common bile duct
- Lining epithelium of gallbladder:
A. stratified squamous
B. stratified cuboidal
C. simple cuboidal
D. simple tall columnar
E. pseudostratified columnar
simple tall columnar
- Tubuloalveolar glands are present at which segment of the gallbladder?
A. cystic duct
B. fundus
C. body
D. all of these
E. neck
neck
- Cells making up the endocrine part of the pancreas:
A. zymogen granules
B. islet of Langerhans
C. acinar cells
D. centroacinar cells
E. none of these
islet of Langerhans
- This is the functional unit of the exocrine pancreas:
A. Delta cells
B. Centroacinar cell
C. Beta cells
D. Acinar tissue
E. Alpha cells
Acinar tissue
- This pancreatic cell secretes the hormone glucagon:
A. Alpha cells
B. Delta cells
C. Beta cells
D. G cells
E. PP cells
Alpha cells
- This pancreatic endocrine product affects the blood sugar level by decreasing it:
A. Gastrin
B. Somatostatin
C. Insulin
D. Pancreatic polypeptide
E. Glucagon
Insulin
- The predominant cell type in the endocrine pancreas:
A. Beta cell
B. Acinar cell
C. Delta cell
D. Centroacinar cell
E. Alpha cell
Beta cell
- Functional unit of the endocrine pancreas:
A. Centroacinar cell
B. Beta cell
C. Islets of Langerhans
D. Acinar tissue
E. Alpha cell
Islets of Langerhans
- The following salivary glands are purely mucous, EXCEPT:
A. Palatine glands
B. Glands at the root of the tongue
C. Lingual gland of Nuhn
D. Glossopalatine glands
E. none of these (all are purely mucous)
Lingual gland of Nuhn
o Von Ebner (Posterior Lingual Gland) – Purely Serous Secretion.
o Blandin & Nuhn (Anterior Lingual Gland) – Mixed Secretion.
- Which of the following glands is purely serous?
A. Sublingual gland
B. Submandibular gland
C. Glands of von Ebner
D. Lingual gland of Blandin
E. Parotid gland
Glands of von Ebner
o Von Ebner (Posterior Lingual Gland) – Purely Serous Secretion.
o Blandin & Nuhn (Anterior Lingual Gland) – Mixed Secretion.
*Parotid – Secretion is Purely Serous.
*Sublingual – Mixed, Predominantly mucous.
*Submandibular – Mixed, Predominantly serous.
- Which gland opens into the vestibule?
A. Glossopalatine gland
B. Submandibular gland
C. Parotid gland
D. Sublingual gland
E. Palatine glands
Parotid gland
- Lining epithelium of larger ducts of salivary glands:
A. Low cuboidal
B. Endothelial cell
C. Stratified cuboidal
D. Pseudostratified columnar
E. Squamous cell
Pseudostratified columnar
- Glandular composition of the parotid gland:
A. Purely mucous
B. Purely serous
C. Seromucous (mixed)
Purely serous
- Serous cells displaced to the terminal portion of the gland:
A. basal myoepithelial cells
B. demilunes of Giannuzzi
C. goblet cells
D. none of these
E. saliva
demilunes of Giannuzzi
- Has contractile properties to facilitate flow of secretions into the ducts:
A. saliva
B. goblet cells
C. none of these
D. basal myoepithelial cells
E. demilunes of Giannuzzi
basal myoepithelial cells
- Opens at the tip of the sublingual papilla, adjacent to the lingual frenulum:
A. duct of Santorini
B. Stensen’s duct
C. duct of Wirsung
D. Wharton’s duct
E. duct of Soledad
Wharton’s duct
