I. Benh di truyen phan tir
3.Benh ung thu
Hogt dpng cda GV Hogt dpng cua HS Npi dung
- GV nhan xet, danh gia.
- GV neu cau hdi: + Ung thu la gi?
+ Phan biet khd'i u lanh tfnh va khd'i u dc tfnh? + Nguyen nhan va co chd gay ung thu la gi?
- GV nhan xet, ddnh gia va giflp HS hoan thien kidn thflc.
- Dai dien HS tra ldi -> ldp bd sung.
- HS nghien cflu SGK vahinh 21.2 SGK trang 89.
- Thao luan nhdm tra ldi dugc.
+ Khai niem.
+ Phan biet khd'i u phai xem td bao cua khdi u cd kha nang di chuyen vao mau va di den co quan khac hay khdng? + Nguyen nhan, co chd rat nhidu: Dot bidn, tac nhan mdi trudng hay do gen.
- Dai dien HS trinh bay, ldp nhan xet.
* Khai niem:
- Ung thu la mdt loai benh dugc dac trung bdi su tang sinh khdng kiem soat dugc cua mdt sd loai td bao co the ddn tdi hinh thanh khd'i u chen ep cdc CO quan.
+ U ac tfnh: Khi cA^ td
bao cua nd cd kha nang tdch khdi md ban ddu di chuydn vao mau di ddn cac noi khac trong co the tao nen nhieu khd'i u khac nhau.
Hogt dpng cda GV Hogt dpng cda HS Npi dung
+ U lanh tfnh: Cac td bao
khdng cd kha nang di chuydn vao mau va di ddn cac nai khdc trong CO thd.
* Nguyen nhan va co chd - Do dot bidn gen, dot bidn NST, do tidp xuc vdi tac nhan phdng xa, hod hgc, vi rut —> cac td bao bj cdc dot bidn khac nhau -> gay ung thu. - Nhdm gen kiem soat chu ki td bao.
+ Hoat ddng cua cac gen tidn ung thu quy djnh tdng hgp cdc nhan td tang trudng chju su dieu khidn cua co the.
+ Ndu gen boat ddng binh thudng tao ra san phdm vfla du dap flng nhu cdu phan bao.
• Ndu gen bj dot bidn -> gen boat ddng manh (gen ung thu) tao ra qua nhidu san phdm -> lam tang tdc do phan bao -> tao cac khd'i u, co the khdng kiem soat dugc (dot bidn trdi)
Hogt dpng cda GV Hogt dpng cua HS Npi dung
- GV giang giai: Binh
thudng hai loai gen tidn ung thu va gen flc chd ung thu boat dgng hai hoa vdi nhau, ndu dot bidn xay ra thi se pha vd CO chd dieu boa phan bao ddn ddn ung thu.
- GV hdi: Chung ta cd the lam gi dd phdng ngfla cac benh ung thu?
- HS van dung kidn thflc va thao luan.
- HS cd the neu dugc: + Sd lugng benh nhan ung thu d Viet Nam mdi nam khoang tren
150000 ca.
+ Tren thd gidi sd ngudi chdt vi ung thu chidm 50% sd ngudi chdt trong mdt nam.
+ Tai Nhat Ban ung thu la can benh gay tfl vong dflng vj trf sd 1. (adsbygoogle = window.adsbygoogle || []).push({});
+ Cai tao mdi trudng dac biet la xfl If chat thai cac nha may.
• Hoat ddng binh thudng lam cac khd'i u khdng hinh thanh.
• Ndu bj dot bidn gen mat kha nang kiem soat khd'i u, cac td bao xudt hien tao khd'i u (dot bidn lan).
Hogt dpng cda GV
Cling cd: Di truyen y hgc da tao ra mdt hudng mdi trong van de phdng va chfla trj nhidu benh nguy hidm d ngudi. - Ban than hgc sinh cdn trang bj kidn thflc dd tham gia tfch cue vao phong trao lam sach mdi trudng dd giam thidu benh tat.
Hogt dpng cua HS + Quan If chat che viec
sfl dung chat boa hgc bao ve thuc vat.
+ Tuyen truyen ve chd do an udng va lam viec phu hgp dd phdng tranh benh.
+ Cd chuang trinh kidm tra sflc khoe djnh ki de phat hien sdm can benh ung thu va cdc benh khdc.
Npi dung
4. Kiem tra danh gia
- GV yeu cdu HS tdm tdt kidn thflc co ban cua bai hgc.
- GV cho HS xem phim hay nghien cflu tu lieu vd mdt sd benh lien quan ddn hdi chflng Dao, benh ung thu
5. Dan do
- Hgc bai, tra ldi cau hdi SGK. - Tim hieu tu lieu vd IQ.
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