Cell adaptaion

Question 1

What are the 5 types of cell adaptive changes?

Answer 1

Atrophy
Hypertrophy
Hyperplasia
Metaplasia
Dysplasia

Question 2

What is atrophy?

Answer 2

Decrease in size / amount of a cell
*** AFTER reaching normal growth

Question 3

What are the properties of atrophy?

Answer 3

Cells regress into smaller cell size and survive
Decreased function

Question 4

What does involution mean?

Answer 4

Atrophy due to physiologic process

e.g. Thymus gets smaller with age

Question 5

What is hypertrophy?

Answer 5

Skeletal & Cardiac muscle that increased in size
*** Without cellular proliferation

Question 6

What is hyperplasia?

Answer 6

Increase in number of cells
*** Reversible

Question 7

What is metaplasia?

Answer 7

Differentiated cell type is replaced by another differentiated cell type
*** Reversible

Question 8

What is dysplasia?

Answer 8

Disordered growth of cells
*** Irreversible (Only cell adaptive mechanism that is irreversible)