Homeostasis (cumulative question) Flashcards
1
Q
integumentary system and skin
A
- thermoregulation (negative feedback loop)
- stimulus -> sensor -> control center -> effect (sweat/blood vessels constrict) -> normal
- protects organs
2
Q
bones
A
- calcium levels in blood
- parathyroid hormone (PTH) increases by accelerating bone recycling
- calcitonin decreases
3
Q
blood: rbc production negative feedback loop
A
- erythropoietin (EPO) excreted by kidney cells when low O2 levels
- rb marrow produces
- increased oxygen delivery
- EPO inhibited
- back again
(old cells destroyed by liver/spleen)
4
Q
cardiovascular system
A
- regulates blood flow
- oxygen/nutrients/wastes/hormone transportation
- arterioles regulate blood pressure
5
Q
muscles
A
produces heat to maintain body temperature, protects/supports internal organs
6
Q
lymphatic system
A
- maintains blood volume (collects excess fluid and returns it via vessels to veins)
- defends against disease
7
Q
respiratory system
A
- supplies blood w/oxygen for cells, rids of CO2
- regulates blood pH
8
Q
digestive system
A
supplies blood w/nutrients and water for cells
- rids body of non-digestible waste
9
Q
pancreas’ insulin and bicarbonate
A
- bicarbonate: pH adjustment, neutralizes acid
- insulin: blood sugar levels
10
Q
urinary system
A
- excrete nitrogenous and other wastes
- water-salt and pH balance regulation
11
Q
kidneys
A
- conserves H20
- regulates pH
- stimulates RBC production
- ADH released by posterior pituitary when low water
- renin
- erythropoietin
12
Q
nervous system
A
regulates/coordinates activities of all other systems
- responds quickly to internal/external stimuli
13
Q
hypothalamus
A
regulates: - blood pressure - heat - breathing rate - digestion - body temp - emotions coordinates:
