Cells To Life
Week 5 Notes
Glandular Epithelia & Epithelial Membranes.
Glandular Epithelia:
- One or more cells that make & secrete an aqueous fluid – usually contains proteins / steroids /
lipids.
- Classified by:
o Site of product release:
§ Endocrine
§ Exocrine
o Number of cells forming the gland:
§ Unicellular – scattered within epithelial sheets – ductless.
§ Multicellular – form by invagination / evagination from an epithelial sheet – have
ducts (tubelike connections to epithelial sheets)
Endocrine (diffuse) Glands:
- Ductless glands that produce mainly hormones.
o Prompts target organs to respond in some way.
- Secretions also include amino acids, proteins, glycoproteins.
- Secrete by exocytosis directly into the extracellular space – hence diffuse endocrine system.
- Most are compact Multicellular organs (eg. Thyroid, ovaries, testes, pancreas)
- Situated close to blood/lymphatic vessels.
www.MedStudentNotes.com
Week 5 Notes
Glandular Epithelia & Epithelial Membranes.
Glandular Epithelia:
- One or more cells that make & secrete an aqueous fluid – usually contains proteins / steroids /
lipids.
- Classified by:
o Site of product release:
§ Endocrine
§ Exocrine
o Number of cells forming the gland:
§ Unicellular – scattered within epithelial sheets – ductless.
§ Multicellular – form by invagination / evagination from an epithelial sheet – have
ducts (tubelike connections to epithelial sheets)
Endocrine (diffuse) Glands:
- Ductless glands that produce mainly hormones.
o Prompts target organs to respond in some way.
- Secretions also include amino acids, proteins, glycoproteins.
- Secrete by exocytosis directly into the extracellular space – hence diffuse endocrine system.
- Most are compact Multicellular organs (eg. Thyroid, ovaries, testes, pancreas)
- Situated close to blood/lymphatic vessels.
www.MedStudentNotes.com
