Homeostasis Flashcards
1
Q
Examples of positive feedback
A
Oxytocin during parturition causes contractions
Digestion of proteins
2
Q
Examples of negative feedback
A
Temperature control
Water balance
pH levels in blood
3
Q
Osmoregulation
A
Osmoreceptors in the hypothalamus
ADH released when water is low
4
Q
Regulating calcium
A
- rise in Ca ions
- thyroid releases calcitonin
- stimulates Ca ion deposits in bones
- fall in Ca ions
- parathyroid glands release PTH
- stimulates releases of Ca from bones and uptake in kidneys
5
Q
Stages of cell necrosis
A
1) Normal cell
2) Reversible swelling
3) Irreversible swelling
4) Disintegration
6
Q
Stages of cell apoptosis
A
1) Normal cell
2) Condensation
3) Fragmentation
4) Apoptic bodies
