SPECIALIZED GLANDULAR EPITHELIUM

Question 1

Name the basis on which the gland are classified ?

Answer 1

1. On the basis of no. of cells.
   a) Unicellular gland
   b) Multicellular gland
   - Exocrine gland
   - Endocrine gland
   - Composite gland
2. On the basis of discharge of secretion
   a) Holocrine
   b) Merocrine
   c) Apocrine

Question 2

What are unicellular gland? explain with example.

Answer 2

• A single cell release some secretion

- Eg.- mucus secreting goblet cell / mucocyte of intestine

Question 3

What are are multicellular gland and what are its type ?

Answer 3

• A group or cluster of cells release some secretion
• Types of multicellular glands are
  - exocrine gland
  - endocrine gland
  - composite gland

Question 4

Short note on exocrine gland.

Answer 4

Exocrine gland ( external secretion)

• Duct present to transport their secretion
• eg.- salivary gland , liver , mamary gland etc.

Question 5

Short note on endocrine gland.

Answer 5

Endocrine gland ( internal secretion)

• Ductless gland secretes harmone into venous blood.
• eg.- pituitary gland , pineal gland , thymus , thyroid , adrenal gland etc.

Question 6

Short note on composite gland.

Answer 6

Composite gland ( mixed gland \ heterocrine gland)

- Partly exocrine and partly endocrine
- eg.- pancreas and gonads(testis in males and ovaries in females)

Question 7

What are holocrine glands ?

Answer 7

• Holocrine gland {holo- complete crine - secretion}
• Complete cell burst to release their secretion
• eg.- sebaceous gland (oil gland)

Question 8

What are apocrine glands ?

Answer 8

• Secretory substance release along with the apical part of the cell.
• eg.- mamary gland and axillary sweat gland

Question 9

What are merocrine glands ?

Answer 9

• Secretory substances gets secreted out by exocytosis without damaging the cells
• eg.- pancreas , salivary gland and intestinal glands.