4.1- Le sang (cours 1) Flashcards

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1
Q

Quel est le volume de sang moyen chez adulte?

A

4 à 7 L

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2
Q

de quoi est composé le sang?

A

-globules rouges: 44%
-globules blancs (et –>)
-plaquettes: 1%
qui baignent dans le plasma (55%)

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3
Q

durée de vie globule rouge:

A

3 à 4 mois

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4
Q

synonyme(s) globules rouges:

A
  • érythrocyte

- hématie

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5
Q

nom de proportion du volume que les G rouges occupent dans sang:

A

(40 à 50%)

taux d’hématocrite

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6
Q

quelle est part. de G rouge?

A

cellule anucléée (pas de noyau)

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7
Q

c quoi hémoglobine?

A

prot. globulaire
- transporte O2, CO2 + contient 1 atome de Fer
- peut transporter jusqu’à 4 molécules à la fois
- constitue le globule rouge (structure)
- en possède 400 millions

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8
Q

où prennent essence les cellules du sang?

A

moelle osseuse rouge

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9
Q

à quoi servent globules blancs?

A

défense immunitaire

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10
Q

synonyme globule blanc:

A

leucocyte

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11
Q

3 types globules blancs:

A

-granulocytes (attaquent/mangent agents infectieux)
-lymphocytes (ciblent/détruisent agents infectieux)
-Monocytes (macrophages)
+ de détails dans notes (sous-types)

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12
Q

C quoi diapédèse?

A

-globules blanc se déforme, puis sort de capillaire sanguin pour défendre cellules

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13
Q

c quoi phagocytose

A

globules blancs s’étirent pour manger corps étrangers

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14
Q

plaquettes:

a) synonyme
b) fonction

A

a) thrombocyte
b) ferment ouverture de plaies (forment membrane étanche)
- coagulation

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