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Histology > Epithelial Glands II > Flashcards

Epithelial Glands II Flashcards

1
Q

Exocrine gland

A

duct persists

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2
Q

Endocrine gland

A

duct does not persist

secretes into capillaries

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3
Q

Compound gland

A

multicellular gland divided into subunits called lobules

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4
Q

Lobule

A

equivalent to simple branched gland

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5
Q

Secretory units of lobule

A

tubular, alveolar (acinar), or tubuloalveolar

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6
Q

Paranchyma

A

components of the gland derived from epithelium

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7
Q

Stroma

A

connective tissue capsule surrounding the entire gland as well as connective tissue that partitions separating the lobules and lobes

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8
Q

Septa (trabeculae)

A

extensions of capsule (stroma) that divide lobes and lobules

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9
Q

Lobes

A

subdivision of a compound gland separated from adjacent lobes by septa

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10
Q

Lobules

A
  • subdivision of lobe
  • separated by septa
  • equivalent to simple, branched gland
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11
Q

Acinus

A
  • secretory components of a lobule
  • serous, mucous, or sero-mucous
  • basement membrane covers outer surface of acinus
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12
Q

Myoepithelial cells

A
  • found between basement membrane and secretory cells of acinus
  • derived from epithelium but are characterized by extensive actin bundles resulting in contractility
  • help to express the secretions of the acini into the intercalated ducts
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13
Q

3 different kinds of ducts

A
  • intralobular ducts
  • interlobular ducts
  • lobar ducts
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14
Q

Intralobular ducts

A
  • ducts that lie WITHIN a lobule
  • two types: intercalated ducts and striated ducts
  • joined by the confluence of 2+ interlobular ducts
  • lined with columnar epithelium transition into stratified columnar epithelium
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15
Q

Intercalated ducts

A
  • drain the secretory acini
  • lined by simple squamous epithelium transition to low cuboidal epithelium
  • involved in bicarb/Cl- exchange
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16
Q

Striated duct

A
  • lined by cuboidal epithelium transitioning to columnar epithelium with basal striations (for active transport)
  • ACTIVELY reabsorbs sodium ions, passively reabsorbs chloride ions, ACTIVELY secretes potassium ions
17
Q

Interlobular ducts

A
  • formed by confluence of 2+ striated ducts and are found in the septa between adjacent lobules (found in connective tissues)
  • lined with pseudo stratified columnar epithelium
  • between lobules inside a lobe
18
Q

Lobar ducts

A
  • formed by confluence of 2+ intralobular ducts

- lobar ducts are lined with stratified columnar epithelium

19
Q

Minor salivary glands

A
  • line oral cavity
  • include Von Ebner’s glands, labial glands, palatal glands, buccal glands
  • keep surface of oral cavity moist
20
Q

Major salivary glands

A

include parotid, submandibular, and sublingual glands

21
Q

Parotid glands

A

-composed only of serous acini

22
Q

Submandibular glands

A
  • mixed glands with both mucous and serous acini, but serous are predominant
  • serous secretory cells form a crescent-shaped configuration around the mucous acini; these are called serous demilunes
23
Q

Sublingual glands

A

-mixed glands but the mucous acini are predominant

Histology (7 decks)

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