Ch.1 Blood Flashcards
% n how much? higher when?
8%, 5-6 liters in a minute, higher in BMR
Artenial blood:
Venous blood:
Both Alkaline:
Alkaline (breath in O2 into blood to tissues for energy prod in cell) for arteries
———————————–
Acidic (bc CO2 is produced as waste product w combined w water making acid taken back to lungs) for veins.
specific gravity
(measuring all solutes) 1.05-1.06, denser than water (1)
viscosity
(more solutes =increase in viscosity = harder/need more energy to pump)
can increase in high alt
4.5-5.5 (centipose more than H20)
plasma=2.5
what happens when low proteins?
blood too dilute making it hypotonic, water goes in to tissues causing swelling ex) potbelly
functions:
transport, regulation, protection, hemostasis
transport
gases
& metabolites: solutes needed throughout body also including nitrogenous waste-> urea, uric acid, creatine & creatinine
Kidney faliure caused by uremia (toxic)
vasodilation
heat is allowed to dissipate from the skin, & non-shiverying thermogenesis = brown fat & beta 2 receptors
vasoconstriction
heat is conserved (prevent heat loss) ex) shivering
& non-shiverying thermogenesis = brown fat & alpha 1 receptor burn making heat
regulation
thermoregulation & osmoregulation
osmoregulation
water is 60% of body weight, 40% is ICF, 20% is ECF (15% interstitial fluid, 5% plasma (300 mOsmols/L)
ADH= prevent water loss depending on situation
blood dilute? 280, ADH absent to lose h2o
concentrate? 320, ADH produced to conserve h2o
Aldosterone: regulate h2o by Na+ retention by osmosis
protection
immune system:
INNATE: nonspecific
ADAPTIVE: humoral=use b cells to make anti body & cell mediated: t cells destroy the infected cells
Hemostasis
Blood coagulation: Fibringen (solube) turns to fibrin (insoluble)
clot retraction uses Thrombosthenin (chemical)
clot dissolution uses Plasminogen
Composition in blood
