Chapter 10 Reverse Flashcards
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transport nutrients, oxygen, carbon dioxide, waste products, hormones
distributes heat
hemeostasis
Functions of blood
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only fluid tissue in body
living cells: formed elements
non-living cells: plasma
Blood components
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erytrocytes (RBC) 45%
buffy coat: leukcytes (WBC) and platelets less than 1%
Plasma 55%
composition of blood
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oxygen rich-scarlet red
oxygen poor-dull red
ph 7.35-7.45
temp 100.4
volume 6 qts
characteristics of blood
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90% water
dissolved substances: nutrients, salts (electrolytes), respiratory gases, hormones, plasma proteins, waste products
Blood Plasma
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most abundant solutes in plasman 7%
most made by liver
albumin
clotting proteins
globulins
Plasma proteins
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60% of plasma proteins
regulates osmotic pressure
made by liver
albumin
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4% of plasma
plays role in blood coagulation
made by liver
clotting proteins
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36% of plasma
Alpha and Beta globulins
transport proteins
made by liver
Globulins
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help protect the body from pathagens
made my lymphocytes
Gamma globulins
(antibodies)
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erythrocytes (RBC)
leukocytes (WBC)
platelets-thrombocytes
Formed elements
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carry oxygen
biconcave disks
bags of hemoglobin
no nucleus
very few organelles
5 million per mm^3
Erythrocytes
RBC
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iron containing protein
binds strongly but reversibly to oxygen
each hemoglobin molecule has 4 O2 binding sites
RBC has 250 million hemoglobin molecules
normal blood 12-18 g per 100ml of blood
Hemoglobin
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kidneys produce most erythropoietin in response to reduced O2 levels in blood
erythropoietin stimulates RBC formatoin in red marrow
homeostasis is maintaind via negative feedback from blood O2 levels
Hemoatopoiesis
Erytrhocyte production
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unable to divide, grow or synthesize proteins
wear out in 100-120 days
when worn out RBC is eliminated by phagocytes in teh spleen or liver
Old RBC
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protect body against pathogens
4000-11,000 WBC per mm^3
differential WBC count lists % of each type of WBC, may change with disease status
Leukocytes
WBC
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fragments of megakaryocytes
form platelet plug to help seal damaged blood vessels
initiates formatoin of blood clot
normal cound 300,000 per mm^3
Platelets
Thrombocytes