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What happens during Phase 4 (resting potential) of the cardiac muscle action potential?
Which phase of the cardiac muscle action potential is characterized by the closure of calcium channels and the opening of slow potassium channels?
During which phase of the action potential does the membrane potential remain positive due to the opening of calcium channels and closure of potassium channels?
What is the primary ion responsible for the initial repolarization during Phase 1 of the cardiac muscle action potential?
During Phase 1 (initial repolarization) of cardiac action potential, what contributes to the repolarization process?
بالـ مرحله الأولى please 1
*استقطاب اولي initial repolarization
*تنسد قنوات الصوديوم الموجبه sodium channels close
* تنفتح قنوات البوتاسيوم هم موجبه opening of
potassium ions
يعني البوتاسيوم K+ راح يطلع من الخليه
* جهد الغشاء +20 millivolt
down
يعني هنا الصوديوم close والبوتاسيوم open
During which phase of the action potential does the membrane potential become more positive due to the opening of sodium channels?
هسـة احنه عرفنا داخل الخليه سالب -90
وخارجها موجب
بالمرحلـة الـزيرو phase 0
* يصير إزاله استقطاب depolazisation
* تنفتح أيونات الصوديوم الموجبه sodium channel open
* يكون membrane potential جهد الغشاء +20 millivolts
Which ion is responsible for the initial depolarization during the cardiac muscle action potential?
During which phase of the cardiac muscle action potential does depolarization occur?
هاي الصفحة اتطلعوا عليها قبل المراحل
ديگول عضله القلب بحاله الراحة داخلها سالب وخارجها موجب
اما اثناء العمل يكون داخلها موجب
والسبب موجود
What is the significance of the delay in electrical potentials in the AV node?
What is the main role of the SA node in the conductive system of the heart?
Which of the following is responsible for delaying the electrical impulses between the atria and ventricles?
Which of the following is responsible for the depolarisation of the ventricles in the heart?
Which of the following is responsible for the contraction of the ventricles in the heart?
انتبهوا لفد نقطة انُ ألياف بركينجي التي تنقلها إلى جميع العضلات البطينية مسببة زوال الاستقطاب البطيني الذي يتبعه مباشرة انقباض البطين
