TCDHA HISTOLOGY EXAM SCRIPT 2026
ACTUAL QUESTIONS AND SOLUTIONS
COMPLETE STUDY SHEET GRADED A+
●● Endocrine glands:.
Answer: glands that secrete chemicals called hormones directly into the
bloodstream
●● Exocrine glands have 4 characteristics;.
Answer: 1. Duct system
2. Shape of secretory unit
3. Mode of Secretions
4. Nature of secretion
●● Serous Secretions are.
Answer: Clear, watery, with protein. Contains digestive enzyme
Amylase
●● Mucous Secretions are.
Answer: cloudy, mucin (glycoproteins) with water
●● Unicellular Secretory Unit.
,Answer: Goblet Cells
●● Multicellular secretory unit.
Answer: Tubular, alveolar/acinus
●● Merocrine Glands.
Answer: secrete product through free surface, no loss of cytoplasm/cell
(salivary glands, pancreas)
●● Apocrine Glands.
Answer: Secrete small amounts of cytoplasm/cell with secretory
product.
Apical portion pinches off + detaches.
Ex. Mammary glands
●● Holocrine Glands.
Answer: entire cells are discharged as secretion (sebaceous glands)
●● Acinus/Acini.
Answer: Consists of single layer cuboidal epithelial cells surrounding a
lumen(central opening) where the saliva is deposited after being
produced by secretory cells
, Located at terminal part of gland
●● Intercalated duct.
Answer: Duct associated with acinus or terminal part of salivary gland.
●● Parotid Gland.
Answer: Largest (Stensons Duct)
Duct system consists of LONG intercalated ducts and SHORT striated
ducts with basal striations.
Serous secretion
25% salivary volume
●● Mumps.
Answer: viral infection of the parotid gland
●● Submandibular Salivary Gland.
Answer: Medium, capsulated gland
Wharton's duct, opens under tongue near frenum at sublingual caruncle
ACTUAL QUESTIONS AND SOLUTIONS
COMPLETE STUDY SHEET GRADED A+
●● Endocrine glands:.
Answer: glands that secrete chemicals called hormones directly into the
bloodstream
●● Exocrine glands have 4 characteristics;.
Answer: 1. Duct system
2. Shape of secretory unit
3. Mode of Secretions
4. Nature of secretion
●● Serous Secretions are.
Answer: Clear, watery, with protein. Contains digestive enzyme
Amylase
●● Mucous Secretions are.
Answer: cloudy, mucin (glycoproteins) with water
●● Unicellular Secretory Unit.
,Answer: Goblet Cells
●● Multicellular secretory unit.
Answer: Tubular, alveolar/acinus
●● Merocrine Glands.
Answer: secrete product through free surface, no loss of cytoplasm/cell
(salivary glands, pancreas)
●● Apocrine Glands.
Answer: Secrete small amounts of cytoplasm/cell with secretory
product.
Apical portion pinches off + detaches.
Ex. Mammary glands
●● Holocrine Glands.
Answer: entire cells are discharged as secretion (sebaceous glands)
●● Acinus/Acini.
Answer: Consists of single layer cuboidal epithelial cells surrounding a
lumen(central opening) where the saliva is deposited after being
produced by secretory cells
, Located at terminal part of gland
●● Intercalated duct.
Answer: Duct associated with acinus or terminal part of salivary gland.
●● Parotid Gland.
Answer: Largest (Stensons Duct)
Duct system consists of LONG intercalated ducts and SHORT striated
ducts with basal striations.
Serous secretion
25% salivary volume
●● Mumps.
Answer: viral infection of the parotid gland
●● Submandibular Salivary Gland.
Answer: Medium, capsulated gland
Wharton's duct, opens under tongue near frenum at sublingual caruncle
