Hoqt dpng cua GV - GV neu eau hdi thao luan
+ Tai sao ndi su tieu hoa dugc hoan thanh d rupt non?
+ Su tieu hoa d dpng vat an thit khac vdi dpng vat an tap d dac didm nao?
Hoqt dpng cua HS
- HS sir dung cac kie'n thiic
d phieu hpc tap dd tra Idi dugc.
+ Su tieu hoa hoan thanh d rupt non vi khi thiic an xudng tdi rupt non thi d
Npidung
Hoqt dpng cua GV
- GV bd sung kieh thiic d
trang 81, 82 SGV.
* Lien hp: bie^t dugc dac didm tieu hoa ciia cae nhdm dpng vat cd y nghia nhu the' nao trong chan nuoi?
- GV yeu eau:
+ Quan sat hinh 15.2 SGK trang 59.
+ Trinh bay cau tao cua nipt.
Hoqt dpng ciia HS
day cd day du cac loai enzim bien ddi tat ca cac loai thiic an (Nhiing loai thiic an nao khong dugc tieu hoa d rupt non se bi thai ra ngoai).
+ Su tieu hoa thiic an d hai nhdm dpng vat khac nhau d each bien ddi va thdi gian tieu hoa thlie an.
- HS CO thd tra Idi dugc: + Cd ch^ dp an hgp ly cho timg nhdm.
+ Dua vao thdi gian tieu hoa dd cung ca'p thiic an. ~ HS quan sat hinh ve, ke't hgp vdi SGK uang 59 va kidn thlie sinh hpc THCS. - Yeu cau neu dugc: + Sd lugng nep gap. + LOng rupt.
- Dai dipn HS Uinh bay tren uanh ve.
- Ldp nhan xet.
Npi dung
b) Su hdp thu cdc chdt dinh dudng
* Cdu tao rupt
- Niem mac rupt cd nhidu ndp gap.
- Tai cac nep gap ed nhieu Idng rupt va cac Idng cue nhd.
- Cd he thdng mao mach j
Hoqt dpng cua GV Hoqt dpng cua HS Npi dung
- GV hdi:
+ Do dau bd mat hap thu cua rupt cd thd tang len hang nghin lan? Didu dd cd y nghia nhu the' nao dd'i vdi su hap thu?
- GV yeu cau HS:
+ Neu CO che' van chuyen cac chat qua mang?
+ cac chat dugc hap thia nhd CO che nao?
+ Quan sat Uanh: con dudng van ehuydn eac chat sau khi ha'p thu.
- GV nhan x^t danh gia va yeu cau HS khai quat ki^n thlie.
- GV bd sung kie'n thiic ve hai con dudng van chuydn cac cha't sau khi hap thu tdi te bao. Dac biet la qua gan dd khir dpc va didu chinh ham lugng dudng trong mau.
- HS van dung ki6i thiic dd tra Idi.
+ Be mat ha'p thu tang len la nhd cd cac nep gap va cae Idng rudt.
+ Dipn tich be mat ha'p thu Idn thi tdc dp hap thu va lugng chat dugc ha'p thu nhidu, kip thdi dd van chuydn deii te bao.
- HS quan sat tranh hinh. - van dung kie'n thlie sinh hpc 10.
- Tra Idi cau hdi. Yeu cau. + Phan biet cac chat hap thu.
+ Nhan biet eon dudng van ehuydn cac cha't.
- Dai dipn HS Ua Idi, ldp nhan xet.
day dac.
- Dipn tich bd mat hap thu tang nhilu lan.
*Coch^hapthu
- Ha'p thu theo co chd khugch tan: (Qua ldp kep photpho lipit).
Bao gdm cac chat glixeim axit beo, vitamin tan ttong dau.
~ Ha'p thu theo co chd van chuydn tich cue: (Tieu tdn nang lugng).
Horn ddng cua GV
* Cung cd: Bai hpc da khai quat dugc mpt sd kie'n thlie vd tieu hoa d dpng vat.
Hoqt ddng cua HS Npi dung
dd la glucO, axit amin, mudi khoang...
* Ket luan chung
- HS dpc ket luan cudi bai trang 60.