Réussir la SVT au lycée Exercice corrigé sur le muscle squelettique

   • IMMUNOLOGIE : COURS DEROULEMENT DE LA REPO...      • IMMUNOLOGIE : LA DEFENSE IMMUNITAIRE      • IMMUNOLOGIE INTRODUCTION AU COURS      • IMMUNOLOGIE : LES DEFICIENCES IMMUNITAIRES   Download the genetics topics for free: 👉🏽 https://drive.google.com/file/d/1Gh2i... Answers for the genetics topics: 👉🏽 https://me.fedapay.com/HQoGeEtb Exercise on protein synthesis 1: https://bit.ly/3EqLxrm Guide Ultimate guide to successfully completing cell annotations: https://me.fedapay.com/7kXEAuXC Passing the Science and Life Sciences Exam in High School Corrected Exercise on Skeletal Muscle 📚 Discover how to pass the Science and Life Sciences Exam in high school with this comprehensive answer key on skeletal muscle! In this educational video, you will study in detail the cellular structures and metabolic reactions associated with muscle contraction. A fully corrected exercise to better understand muscle energy pathways (glycolysis, lactic fermentation, cellular respiration), key molecules (ATP, phosphocreatine, lactic acid), and the role of calcium ions in neuromuscular transmission. 🔬 You will also learn how to interpret experimental results involving three frog muscles subjected to different treatments. An in-depth analysis of toxins acting on the neuromuscular synapse is also covered. 📖 Ideal for high school students, competitive exam candidates, or those looking to strengthen their knowledge of Life and Earth Sciences (SVT). 🔔 Don't forget to click "Like" if this video helped you, and subscribe so you don't miss any posts! We will study the function of the muscle cell during contraction. The following document 2 represents the cellular structures and the metabolic reactions involved. 1- Name a- the structures designated by the numbers (from 1 to 8) (2 points) b- the molecules X, Y, Z, and W (1 point) c- the functions (or metabolic pathways) A, B, and C (0.75 points) 2- Specify the role of molecule X in muscle contraction. Write the equation for the corresponding reaction. (0.5 pts) 3- Three frog gastrocnemius muscles, M1, M2, and M3, were subjected to intense electrical stimulation of the same duration. M1 is a control muscle that has not undergone any treatment. M2 underwent treatment to block two metabolic pathways. M3 underwent treatment to block a single metabolic pathway. The following table details the observed muscle responses and the results of the assays performed on the three muscles. Note: Each assay result in the table corresponds to the difference between the quantity of the substance assayed before the stimulations (Q1) and the quantity of the same substance at the end of the experiment (Q2). Use the results in this table and use your knowledge to: a- Specify the source of the energy used by muscle M1. Justify (0.5 pts) b- Deduce the metabolic pathways blocked in M2 and M3. Justify. (0.5 points) 4- We isolate the structures of zone 7 (document 2) and place them in a physiological fluid rich in calcium ions, and we create the experimental setup shown in document 3. We achieve effective stimulation of St under different experimental conditions. The experiments and results obtained are presented in the following table. Based on the results and your knowledge, identify: a- The effect of each toxin on neuromuscular transmission, knowing that each of these toxins acts on a specific level of the synapse. (2 points) b- The role of calcium ions in neuromuscular transmission (0.5 points) Link to join my WhatsApp group: https://chat.whatsapp.com/GeXMp69HxNu... Introductory computer course: https://cutt.ly/HF8QYUp INFO LINE: 00228 91 57 67 34 (WHATSAPP)