L17 Flashcards
What factors affect growth?
• Enviromental factors e.g.
NUTRITION: deficiencies/excess.
• Internal factors e.g.
• GENETIC • ENDOCRINE: DM, Iodine, GH.• BLOOD SUPPLY• NERVE SUPPLY • STRESS: psycho-social, diseases.
• NEOPLASIA: DNA mutation loss of control over cell division.
What is agenesis?
Agenesis is the complete absence of an organ and its primordium.
What is aplasia?
Aplasia is the complete failure of development of an organ, represented by a fibrous streak.
What is hypoplasia?
Hypoplasia is the failure of an organ to reach its normal size.
What is atrophy?
Atrophy is the decrease in the size of an organ due to a decrease in the size and number of its cells.
What is hyperplasia?
Increased cellular growth.
What is hypertrophy?
Increased size of an organ due to an increase in the size of its cells., Increased cellular growth.
What is metaplasia?
Abnormal cellular differentiation.
What is dysplasia?
Abnormal cellular differentiation.
What is neoplasia?
Abnormal uncontrolled cell growth.
