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  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • strict warning: Non-static method view::load() should not be called statically in /home/web4scho/public_html/modules/acquia/views/views.module on line 1113.
  • strict warning: Declaration of views_handler_field::query() should be compatible with views_handler::query($group_by = false) in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_field.inc on line 1147.
  • strict warning: Declaration of views_handler_sort::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_sort.inc on line 165.
  • strict warning: Declaration of views_handler_sort::options_submit() should be compatible with views_handler::options_submit($form, &$form_state) in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_sort.inc on line 165.
  • strict warning: Declaration of views_handler_sort::query() should be compatible with views_handler::query($group_by = false) in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_sort.inc on line 165.
  • strict warning: Declaration of views_handler_filter::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_filter.inc on line 587.
  • strict warning: Declaration of views_handler_filter::query() should be compatible with views_handler::query($group_by = false) in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_filter.inc on line 587.
  • strict warning: Declaration of views_handler_filter_node_status::operator_form() should be compatible with views_handler_filter::operator_form(&$form, &$form_state) in /home/web4scho/public_html/modules/acquia/views/modules/node/views_handler_filter_node_status.inc on line 13.
  • strict warning: Declaration of views_handler_filter_term_node_tid_depth::operator_options() should be compatible with views_handler_filter_in_operator::operator_options($which = 'title') in /home/web4scho/public_html/modules/acquia/views/modules/taxonomy/views_handler_filter_term_node_tid_depth.inc on line 89.
  • strict warning: Non-static method views_many_to_one_helper::option_definition() should not be called statically, assuming $this from incompatible context in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_filter_many_to_one.inc on line 23.
  • strict warning: Non-static method views_many_to_one_helper::option_definition() should not be called statically, assuming $this from incompatible context in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_filter_many_to_one.inc on line 23.
  • strict warning: Declaration of views_plugin_query::options_submit() should be compatible with views_plugin::options_submit($form, &$form_state) in /home/web4scho/public_html/modules/acquia/views/plugins/views_plugin_query.inc on line 169.
  • strict warning: Declaration of views_plugin_style_default::options() should be compatible with views_object::options() in /home/web4scho/public_html/modules/acquia/views/plugins/views_plugin_style_default.inc on line 24.
  • strict warning: Declaration of views_plugin_row::options_validate() should be compatible with views_plugin::options_validate(&$form, &$form_state) in /home/web4scho/public_html/modules/acquia/views/plugins/views_plugin_row.inc on line 136.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • warning: Illegal string offset 'block_classes_switch' in /home/web4scho/public_html/sites/all/modules/om_maximenu/om_tools/tools/block/block.inc on line 50.
  • strict warning: Non-static method view::load() should not be called statically in /home/web4scho/public_html/modules/acquia/views/views.module on line 1113.
  • strict warning: Declaration of views_handler_field_user::init() should be compatible with views_handler_field::init(&$view, $options) in /home/web4scho/public_html/modules/acquia/views/modules/user/views_handler_field_user.inc on line 48.
  • strict warning: Declaration of views_handler_field_node_new_comments::pre_render() should be compatible with views_handler_field::pre_render($values) in /home/web4scho/public_html/modules/acquia/views/modules/comment/views_handler_field_node_new_comments.inc on line 101.
  • strict warning: Declaration of views_handler_argument::options_validate() should be compatible with views_handler::options_validate($form, &$form_state) in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_argument.inc on line 917.
  • strict warning: Declaration of views_handler_argument::query() should be compatible with views_handler::query($group_by = false) in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_argument.inc on line 917.
  • strict warning: Non-static method views_many_to_one_helper::option_definition() should not be called statically, assuming $this from incompatible context in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_argument_many_to_one.inc on line 35.
  • strict warning: Non-static method views_many_to_one_helper::option_definition() should not be called statically, assuming $this from incompatible context in /home/web4scho/public_html/modules/acquia/views/handlers/views_handler_argument_many_to_one.inc on line 35.
  • strict warning: Declaration of views_plugin_argument_validate::options_submit() should be compatible with views_plugin::options_submit($form, &$form_state) in /home/web4scho/public_html/modules/acquia/views/plugins/views_plugin_argument_validate.inc on line 87.

Devoir de SVT - Muscle squeléttique, Sang et milieu intérieur - Tle C & D


Points: 100
SKU: w4se246

Exercice I
Dans le but d’identifier quelques phénomènes qui accompagneraient la contraction musculaire, les expériences ci-dessous sont réalisées :

– Le dispositif A a permis d’enregistrer le document 1.

– Le dispositif B a permis  d’obtenir le document 2.

Étude d’un effecteur moteur : le muscle squelettique

1°)          a- Pour chaque document, faites une analyse comparée des tracés.

b- Déduisez la nature des phénomènes enregistrés et tirez une conclusion.

2°) Document 1 : Expliquez la relation qui existe entre les tracés I et II du document I

3°) Document 2
a- Expliquez l’origine des parties (a) et (b) du tracé du document 2.

b- Si on refait l’enregistrement en atmosphère d’azote, c’est-à-dire sans oxygène, la partie (b) du tracé 2 disparaît.
Déduisez en les voies métaboliques responsables de (a) et de (b).

Exercice II
Le document ci-dessous traduit le métabolisme d’une fibre musculaire striée.

1°) Annotez les molécules et les fonctions désignées par les lettres.

2°) Donnez une, au moins des deux qualités fondamentales de la molécule A que fait apparaître ce schéma.

3°) Indiquez les différences entre les deux voies d’utilisation du glucose.

4°) Précisez le rôle de l’oxygène dans la fonction E.

5°) Donnez la raison pour laquelle on dit que la fibre musculaire est hétérotrophe.

Exercice III
Le diabète insipide est une maladie qui s’observe à la suite des lésions de la zone postérieure de l’hypophyse ; elle se manifeste par l’élimination d’une quantité anormalement élevée d’urine (20 litres et plus par jour). On relève chez un sujet atteint de cette maladie et ayant bu 1700 cm3 d’eau les volumes d’urine avant et après injections d’extraits hypophysaires ; le tableau ci-dessous donne les valeurs obtenues :

 

Temps (en mn)

0

15

30

45

60

75

90

105

120

135

Volume d’urine (cm3/h) avant injection d’extraits

180

280

400

550

660

780

800

800

800

800

Volume d’urine (cm3/h) après injection d’extraits

180

210

250

280

185

160

140

100

80

80

 

1°) Représentez sur le même repère les courbes du volume d’urine éliminée en du temps.
Echelle : 1cm = 15mn ; 1cm = 100 cm3/h.
2°)          a) Analysez ce graphique
b) Interprétez l’action de l’extrait hypophysaire.
3°) Déterminez le rôle de l’hypophyse dans le contrôle du fonctionnement rénal.

 

Points: 100