Homeostasis (cumulative question) Flashcards Preview

HSCI100 > Homeostasis (cumulative question) > Flashcards

Flashcards in Homeostasis (cumulative question) Deck (13):
1

integumentary system and skin

- thermoregulation (negative feedback loop)
- stimulus -> sensor -> control center -> effect (sweat/blood vessels constrict) -> normal
- protects organs

2

bones

- calcium levels in blood
- parathyroid hormone (PTH) increases by accelerating bone recycling
- calcitonin decreases

3

blood: rbc production negative feedback loop

- 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

cardiovascular system

- regulates blood flow
-oxygen/nutrients/wastes/hormone transportation
- arterioles regulate blood pressure

5

muscles

produces heat to maintain body temperature, protects/supports internal organs

6

lymphatic system

- maintains blood volume (collects excess fluid and returns it via vessels to veins)
- defends against disease

7

respiratory system

- supplies blood w/oxygen for cells, rids of CO2
- regulates blood pH

8

digestive system

supplies blood w/nutrients and water for cells
- rids body of non-digestible waste

9

pancreas' insulin and bicarbonate

- bicarbonate: pH adjustment, neutralizes acid
- insulin: blood sugar levels

10

urinary system

- excrete nitrogenous and other wastes
- water-salt and pH balance regulation

11

kidneys

- conserves H20
- regulates pH
- stimulates RBC production
- ADH released by posterior pituitary when low water
- renin
- erythropoietin

12

nervous system

regulates/coordinates activities of all other systems
- responds quickly to internal/external stimuli

13

hypothalamus

regulates:
- blood pressure
- heat
- breathing rate
- digestion
- body temp
- emotions
coordinates: