Human body systems

Question 1

Tissue support

Extracellular matrix

Answer 1

• Material synthesised and secreted by cells of that tissue
• Has proteoglycans and insoluble protein fibres
• Lots in connective tissue also other functions (support)

Question 2

Tissue support

Cell junctions

Answer 2

• Held together by cell adhesion molecules
• Gap junctions between cells that allows to move freely
• Tight junction hold the cells together stop molecules passing
• Desmosome - strain on cell like cardiac

Question 3

Tissue support

Exchange

Answer 3

• Base thin layer of matrix
• Exchange simple flattened (squamous) has pores rapid exchange (more than one layer called stratified)
• Blood vessels called endothelium

Question 4

Tissue support

Transport and ciliated

Answer 4

• Active regulation as they are ciliated many folds higher surface area
• Sweep fluids across surface in reproductive tract

Question 5

Tissue support

Protective

Answer 5

• Epidermis has a stratified structure provides strength
• Prevents exchange occurring across structure

Question 6

Secreatory

Answer 6

• Loose connective tissue such as adipose tissue cartilage and fluid is blood
• Dense connective tissue such as tendon bones a ligiment and irregular form skin supported by bones and fluid is lyph

Question 7

Homeostasis

Answer 7

Regulating the condition within the normal range internally via physiological control mechanism

Question 8

Negative feedback loop

Answer 8

• Once corrective mechanism is inforced return stimulus to normal conditions