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1
Partie I(8pts)
A –QCM(4pts) : pour chaque item il existe une ou deux réponses exactes, reportez sur
votre copie la (ou les lettres) correspondants à (ou aux) bonnes réponses
1/une hypersécrétion de rénine apparait à
la suite d’une :
a) augmentation du volume sanguin
b) hémorragie
c) hypertension
d) hypotension
5/La portion Fc des anticorps est le
support des propriétés fonctionnelles
suivantes :
a) la reconnaissance de l'antigène
b) la fixation du complément
c) la liaison aux cellules phagocytaires
d) l'activation des mastocytes
2/la pression diastolique:
a) Est la valeur maximale obtenue au
cours de la contraction des ventricules.
b) Est obtenue au cours du relâchement
du muscle cardiaque.
c) Est de valeur normale de 120mmHg
d) Augmente en cas d’hypotension.
6/le mastocyte :
a) est un plasmocyte
b) est sensibilisé suite au 1er contact avec
l’allergène
c) possède des récepteurs spécifiques
aux IgE
d) est une cellule du système
immunitaire
3/la séropositivité est révélée par :
a) l’effondrement total du système
immunitaire
b) la transcription de l’ARN viral en
provirus
c) la présences d’anticorps anti-VIH
d) l’apparition des maladies
opportunistes.
7/au cours de la phase d’alarme de stress
il y a sécrétion :
a) d’ACTH
b) de cortisol
c) de thyroxine
d) d’adrénaline
4/ La vaccinothérapie permet :
a) - de stimuler les défenses immunitaires par
injection de sang,
b) - une immunité immédiate par injection
d’anticorps provenant d’un autre organisme,
c) - de créer une mémoire immunitaire
spécifique par injection d’un micro-organisme
rendu inoffensif,
d) - de créer une immunité immédiate par
injection de globules blancs provenant d’un
autre organisme.
8/les anticorps membranaires :
a) sont présents sur la membrane des
macrophages
b) présentent une structure variable d’un
clone de lymphocyte à l’autre.
c) reconnaissent indifféremment le non-
soi et le soi modifié
d) se fixent sur un antigène grâce à leur
TCR.
Section: sciences expérimentales
Epreuve : SVT
Durée : 3heures
Bac Blanc
Mai 2015
mmaMMMmm
Lycée Ibn Khouldoun Métouia
Prof : Mme
Chattaoui.Lamia
2
B-QROC(4pts)
Partie II(12pts) A-(4pts)
3
B-(8pts)
4
5

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  • 1. 1 Partie I(8pts) A –QCM(4pts) : pour chaque item il existe une ou deux réponses exactes, reportez sur votre copie la (ou les lettres) correspondants à (ou aux) bonnes réponses 1/une hypersécrétion de rénine apparait à la suite d’une : a) augmentation du volume sanguin b) hémorragie c) hypertension d) hypotension 5/La portion Fc des anticorps est le support des propriétés fonctionnelles suivantes : a) la reconnaissance de l'antigène b) la fixation du complément c) la liaison aux cellules phagocytaires d) l'activation des mastocytes 2/la pression diastolique: a) Est la valeur maximale obtenue au cours de la contraction des ventricules. b) Est obtenue au cours du relâchement du muscle cardiaque. c) Est de valeur normale de 120mmHg d) Augmente en cas d’hypotension. 6/le mastocyte : a) est un plasmocyte b) est sensibilisé suite au 1er contact avec l’allergène c) possède des récepteurs spécifiques aux IgE d) est une cellule du système immunitaire 3/la séropositivité est révélée par : a) l’effondrement total du système immunitaire b) la transcription de l’ARN viral en provirus c) la présences d’anticorps anti-VIH d) l’apparition des maladies opportunistes. 7/au cours de la phase d’alarme de stress il y a sécrétion : a) d’ACTH b) de cortisol c) de thyroxine d) d’adrénaline 4/ La vaccinothérapie permet : a) - de stimuler les défenses immunitaires par injection de sang, b) - une immunité immédiate par injection d’anticorps provenant d’un autre organisme, c) - de créer une mémoire immunitaire spécifique par injection d’un micro-organisme rendu inoffensif, d) - de créer une immunité immédiate par injection de globules blancs provenant d’un autre organisme. 8/les anticorps membranaires : a) sont présents sur la membrane des macrophages b) présentent une structure variable d’un clone de lymphocyte à l’autre. c) reconnaissent indifféremment le non- soi et le soi modifié d) se fixent sur un antigène grâce à leur TCR. Section: sciences expérimentales Epreuve : SVT Durée : 3heures Bac Blanc Mai 2015 mmaMMMmm Lycée Ibn Khouldoun Métouia Prof : Mme Chattaoui.Lamia
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