NATS 1610 Lecture Notes - Lecture 30: B Cell, Lymphocyte, Antigen

• School: York University
• Department: Natural Science
• Course: NATS 1610
• Professor: Barbara Czaban

Document Summary

Web link with many resources check out the web tutorials (not all may be relevant to this course) Antibodies: classes, structure, modes of action. Humans (and other animals) are born with general immune defences and acquire other specific. Carried out by some white blood cells and plasma proteins. A(cid:271)ilit(cid:455) of i(cid:373)(cid:373)u(cid:374)e (cid:272)ells to di tingui h (cid:271)et(cid:449)ee(cid:374) (cid:271)od(cid:455)(cid:859)s o(cid:449)(cid:374) (cid:272)ells (cid:894)self) & infectious agents (non-self) The(cid:374) to eli(cid:272)it a (cid:862)spe(cid:272)ifi(cid:272) atta(cid:272)k(cid:863) agai(cid:374)st pecific i(cid:374)fe(cid:272)tious age(cid:374)ts. Retains memory of exposure and responds rapidly if pathogen is encountered again. Formation of memory cells permits system to react more swiftly against specific invaders in the future. Two specific types of adaptive defences: antibody-mediated immunity (humoral immunity) Involves production of antibodies by b lymphocyte derivatives known as plasma cells. B lymphocytes (b-cells) recognize free-existing foreign invaders (bacteria, bacterial toxins, some viruses, etc. : cell-mediated immunity. T-cells (cid:396)e(cid:272)og(cid:374)ize (cid:894)a(cid:374)d dest(cid:396)o(cid:455)(cid:895) (cid:862)a(cid:271)(cid:374)o(cid:396)(cid:373)al (cid:272)ells(cid:863) such as virus-infected cells and cancer cells.