2 The 4 Tissues

Question 1

Epithelial tissue

Answer 1

• Often at the edge of tissues or surrounding them
• They are polarised when at the surfaces
• Always have basement membrane on the basal layer
• May not always have a reticular layer
• If clustered together can form a gland
• Often secrete something from the apical surface
• Held together by strong anchor proteins
• Communication through lateral and basal junctions, rarely apical

Question 2

Connective Tissue
Examples?
Products?

Answer 2

Fibroblast, chondrocytes, osteocytes, osteoblasts, osteoclasts, stem cells, progenitor cells, bone marrow, adipocytes, blood.

Products: fibres, ground substances, wax/gel-like substances

Question 3

Nerve tissue

Answer 3

• Primarily made up of neurons and support cells.
• Fast communication.
• Nerves congregate to make fibres which congregate to make nerves.

Question 4

Muscle tissue:
Types
Function
Secretorys

Answer 4

Types: skeletal (striated), cardiac (involuntary) and smooth (non-striated and involuntary)
Function: main function is to contract. Movement, stability and movement of tissue content.
Secrete hormones eg. Natriuretic, factors A and B, myostatins.