Exocrine glands Flashcards Preview

Year 1 Cell Biology > Exocrine glands > Flashcards

Flashcards in Exocrine glands Deck (36):
1

Exocrine glands are derived from what type of tissue?

Epithelial

2

How are exocrine glands classified?

1. Type of secretion2. Mode of secretion3. Cell numbers

3

What do mucous glands secrete?

Mucinogens

4

What is mucin?

Hydrated mucinogens

5

What are examples of mucous glands?

1. Goblet cells2. Mucous cells

6

What are mixed glands?

Contain serous and mucous secretory uits

7

What are examples of mixed glands?

1. Submandibular gland2. Sublingual gland

8

What are characteristics of merocrine secretion?

1. Exocytosis2. No loss of plasmalemma or cytoplasm3. Most common

9

What are characteristics of apocrine secretion?

1. Secretory product is released along with apical cytoplasm and apical plasmalemma

10

Mammary glands use what type of secretory gland process for lipids?

Apocrine

11

What are characteristics of holocrine secretion?

The entire cell and its secretory product is released

12

Sebaceous glands use what type of secretory gland process?

Holocrine

13

What are the two shapes of secretory units?

1. Acinus (aka alveolar)2. Tubular

14

What are examples of simple duct systems that do not have an excretory duct?

Stomach / intestinal glands

15

What are two types of intralobular ducts?

1. Intercalated 2. Striated

16

What are myoepithelial cells?

Contractile cells derived from epithelium

17

Myoepithelial cells contain what types of filaments?

Actin and myosin

18

How would you confirm the epithelial origin of myoepithelial cells?

Cytokeratin

19

Where are myoepithelial cells located?

Surround the secretory units of many multicellular glands (mamary, sweat, large salivary) and small ducts and share their basal lamina

20

How are myoepithelial cells connected to epithelial cells?

Desmosomes and gap junctions

21

What is the classification of the parotid gland?

Compound acinar

22

Is the parotid gland purely serous, purely mucous, or mixed?

Purely serous

23

What kind of intralobular ducts does the parotid gland have?

Intralobular and intercalated

24

What is the classification of the submandibular gland?

Compound tubuloacinar

25

Is the submandibular gland purely serous, purely mucous, or mixed?

Mixed, but mostly serous (demilune parts)

26

Are serous demilunes present in living tissue?

No

27

What are the characteristics of the intralobular ducts in the submandibular gland?

Prominent striated ducts, short intercalated ducts

28

What is the classification of the sublingual gland?

Compound tubuloacinar

29

Is the sublingual gland purely serous, purely mucous, or mixed?

Mixed, but mostly mucous (serous demilunes are sparse)

30

What are the characteristics of the intralobular ducts in the sublingual gland?

Less developed than those of other salivary glands

31

What are some symptoms of Sjogren syndrome?

Dry eyes, dry mouth, dysphagia, dysphonia, difficulty tasting, cracked lips, parotid enlargement by 50%

32

What is the classification of the pancreas?

Compound acinar

33

The pancreas is most similar to what other gland?

Parotid

34

What differentiates the pancreas from the parotid gland?

1. Islets of Langerhans2. Centroacinar cells3. Absence of striated ducts

35

What feature is unique to the pancreas?

Centroacinar cells

36

What are the characteristics of the intralobular ducts in the pancreas?

1. Centroacinar cells represent the intra-acinar segment of the intercalated duct2. Large intralobular ducts3. Interlobular ducts4. Duct cells secrete bicarbonate