Cell And Homeostasis Flashcards
1
Q
Cell theory
A
Each cell has identical dna but every gene is expressed differently causing different functions.
2
Q
Endothelium
A
Closed system. Ex: blood vessels
3
Q
Epithelium
A
Is exposed to outside environment ex: skin, sweat glands.
4
Q
Dynamic constancy
A
Negative feedback- a home static mechanism maintains parameter around a normal range ( with fluctuations above and below)
5
Q
Positive feedback
A
Something starts to get away from set point, but body takes it further back. ( pregnancy and blood clotting)
6
Q
Homeostasis via Smooth muscle regulation
Contracted vs relaxed
A
Contracted : high pressure/ resistance
Relaxed: low pressure / resistance
7
Q
Homeostasis and glucose
A
Eat blood sugar rises pancreatic islets insulin produced cells increase uptake of glucose blood glucose goes down
