Tissues of the Body

Question 0

Exocrine

Answer 0

Glands with ducts

Question 1

Gland

Answer 1

Epithelial cell or collection of cells specialised for secretion

Question 2

Endocrine

Answer 2

Ductless glands

Secrete into the blood stream

Question 3

How to classify glads

Four methods

Answer 3

Destination of secretion
Structure of gland
Nature of secretion
Method of secretion

Question 4

Destination

Answer 4

Exocrine – ducts to epithelial tissue

Endocrine – into blood stream

Question 5

Structure of gland

Answer 5

1 – secretory part

• — unicellular or multicellular
• — acinar (grape shape) or tubular
• — coiled or branched

2 – duct system

• – simple gland (single duct)
• — complex gland (branched duct)

Branching ducts
Main > interlobular > intralobular > intercalary

Question 6

Nature of secretion

Answer 6

1 – mucous glands

• – secrete mucus
• – rich in mucins
• – stain poorly

2 – serous glands

• – secrete watery enzymes
• • eosinphillic (pink)

Question 7

Method of secretion

Answer 7

Merocrine
Apocrine
Holocrine

Question 8

Merocrine

Answer 8

Basically exocytosis
1- membrane bound component approaches cell surface
2- fuses with plasma membrane
3- contents and in continuity with extra cellular space
4- membrane is achieved to maintain surface area

Question 9

Apocrine

Answer 9

Has to get membrane from the plasma membrane
1- non-membrane bound structure approaches cell surface
2- makes contact and pushes up apical membrane
3- thin layer of apical cytoplasm drapes around droplet
4- membrane pinches off from cell
5- membrane replaced from cell