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Flashcards in Glands Deck (19):
0

Define glandular tissue

-Type of epithelia cell (an aggregation of cells) which are specialised for secretion

1

What is an exocrine gland?

-A gland which secretes to the outside of the body via ducts

2

What is an endocrine gland?

A ductless gland which secretes into the bloodstream

3

What type of glandular structures are there?

-Unicellular/multicellular
-Simple/compound
-Acinar/tubular
-Coiled/branched

4

Where do unicellular gland secrete onto?

Epithelial cells

5

What is endocytosis?

-Cell makes contact with extracellular material
-Cell surrounds material

6

What is transepithelial transport?

-1)Endocytosis at one membrane
2)Transport vesicle
3)secretion/exocytosis at opposite membrane

7

Describe the secretions of serous glands

-Watery and free of mucus
-Often contain enzymes
-Stain eosinophilic with H+E

8

Which epithelia cells continually regenerate?

-Respiratory
-Digestive
-Urinary
-Skin

9

Describe merocrine secretion

-Membrane bound vesicle approaches cell surface
-Fuses with plasma membrane
-Contents released into extracellular space
-PM transiently larger
-Membrane retrieved

10

Describe apocrine secretions

-Non-membrane bound structures approach pm
-contacts apical membrane and pushes up
-membrane surrounds droplet and pinches off
-membrane added to regain size

11

Describe holocrine secretion

-The cell disintegrates and releases the whole cell contents

12

What are the three salivary glands and what are their secretion types?

-Parotid ->serous
-Sublingual ->mucus
-Submandibular ->both (mucus pushes serous to edge of cell forming a cresent)

13

What is an adenocarcinoma?

-Malignant neoplasm from glandular epithelial cells

14

Why is glycosylation of proteins important and where does it occur?

-Adds biochemical specificity to the protein
-Occurs in the golgi

15

How do proteins migrate through the cisternae of the golgi?

-Swelling at the ends of the cisternae
-Buds off into vesicles
-Join the next membrane disc

16

What is the fate of the vesicles produced from the golgi?

-Enter regulatory secretory pathway
-Enter constitutive pathway
-Remain in the cell as lysosomes
-Enter the glycocalyx of the pm

17

What does the glycocalyx of the pm do?

-Adds biological specificity
-Adherence of cell
-Communication
-Protection - lubrication
-Division

18

What is the purpose of secretion and how is secretion controlled?

-Communication
-Regulation of pathways
-Lubrication
-Protection
-Nervous and endocrine hormonal control