Week 1: Cell Adaptation and Death

Question 1

Examples of Epithelial, connective and ‘other’ cell types

Answer 1

Epithelial: Simple columnar (glandular), Stratified squamous, Ciliated pseudostratified columnar becoming ciliated simple cuboidal

Connective:

Other:

Question 2

Definition and examples of labile, stable and permanent cells

Answer 2

• Labile (continuously dividing)
• Epithelial e.g. Skin, GIT, reproductive, urinary tracts , lining of exocrine ducts
• Haemopoietic stem cells
• Stable (quiescent)
• Epithelial e.g. Liver, kidney, lung, pancreas
• Smooth muscle cells, fibroblasts, endothelial cells
• Permanent (non-dividing)
• Cardiac & skeletal myocytes, CNS neurons

Question 3

Definition and occurrence of an infarct

Answer 3

Necrosis. Cell dying by necrosis kills neighbouring cells population of cells= infarct

Question 4

Definition of metaplasia

Answer 4

The change from one normal, well-differentiated cell type to a different normal well-differentiated cell type typically in response to a change in the cellular environment or the application of stress.

Question 5

Cellular Process leading to tissue/ organ size increase/ decrease

Answer 5

Apoptosis= decrease in cell number
Autophagy= decrease in cell size

Hyperplasia= increase cell number
Hypertrophy= increase in cell size

Question 6

Example of a permanent cell typeNeuronal cell

Answer 6

Neuronal cell