stuff 🩷

👑 A 19-year-old patient with selective deficiency of an IgG subclass presents with recurrent pyogenic infections. Laboratory evaluation shows that the deficient subclass normally constitutes only a very small percentage of total IgG and is unique because it does not activate the classical complement pathway. Which of the following subclasses is deficient? 🔹A) IgG1 🔹B) IgG2 🔹C) IgG3 🔹D) IgG4

يله خلص العيد تونستوا اخذتوا عيديات هسه حدز بعد 😎

هاي شبيكم والله نيتي انو اتمنالكم تستمتعون بالعيد مو قصدي تدرسون

يلا استمتعوا بالعيد

بس العفو طلاب هاي ما ادري بيها حاطة غير صورة عدلتها

🔹Each epitope can activate a different B lymphocyte clone. -So the immune response against a whole microorganism usually produces many different antibodies. -This is called a polyclonal antibody response. -Polyclonal means: many B-cell clones are activated, and each clone produces antibody against a different epitope.

🔹B cell → plasma cell → antibody secretion مهم 🔹Antibody specificity is toward a single epitope, not a whole organism.

🚨 Tolerogen 🔹If an antigen does not cause an immune response, it is called a tolerogen.

مهمة الملاحظات

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👑 Which pairing is INCORRECT? 🔹A) C3b — opsonization 🔹B) C5a — chemotaxis and mast cell degranulation 🔹C) C5b — initiation of MAC 🔹D) C9 — major opsonin

خل نعقد صفقة الي تبجون سدوا القناة بعدين من تقرون فتحوها

💎 To be immunogenic, a substance must be 1-Recognized as foreign 2-Have chemical complexity 3-Sufficient size.

يلا تحملوها مظل هالكم يوم و يخلص الثالث على خير و سلامة