- Trinh bay ca ch^ dieu hoa hoat dpng tim mach. Cho vi du cu the?
2. Trong tam
- Y nghTa ciia can bing npi mdi de'n hoat dpng sdng cua te' bao trong cd the? - Cac CO che' dam bao can bing ip suit thim thiu, pH va cin bing nhiet, so
do khai quit ve ca chd dieu hoa.
3. Bai mdi
Hoqt ddng 1: Tim hieu y nghia cua can b^ng npi mdi
Muc tieu:
- HS hieu y nghia can bing npi mdi.
- HS neu dugc y nghia can bing npi mdi vdi boat dpng sdng cua co the.
Hoqt dpng cua GV - GV neu yeu ciu.
+ Hinh thanh khai niem can bing npi m6i.
+ Neu y nghia ciia can bang npi mdi.
- GV ggi y:
+ Co thd sdng ton tai va phat ttidn khi mdi trudng ttong nhu the nao?
+ Cac hoat sdng nao lien quan de'n vipc dn dinh mdi trudng ttong?
- GV nhan xet danh gia va giup HS hoan thien kie'n thiic.
Hoqt ddng cua HS
- HS boat ddng dpc lap:
+ Nghien ciiu SGK ttang 80.
+ van dung cac kie'n thiie sinh hgc d cac ldp ttude vd trao ddi chit, ap suat tham tha'u, pH..
- Mdt vai HS tta Idi ldp thao luan va thdng nhat kie'n thiic.
Npi dung
a) Khdi niim
can bing npi mdi la duy tti su can bing va dn dinh mdi trudng ttong dd cac hp thdng sdng ton tai va phat tridn.
- Su can bang dn dinh bao ham su can bing khdi luong
Hoat dpng cua GV Hoqt dpng cua HS '
~ HS liy VI du minh hoa ttt
kie'n thiic vd enzim va ttao ddi chit
Ndi dung
nudc, can bing v^ ndng dp cac chit nhu glucOzo, cac ion, cac axit amin, cac axit beo, mudi khoang.
b) t nglua
- Duy tti ap suit thim thiu
huyet ap va dd pH ciia m6i ttudng ben ttong dugc dn dinh.
- Dam bao eho su tdn tai va thuc hipn dugc chiic nang
sinh li ciia cac ti bao eo thd
vdi su tham gia cua enzim.
Hoqt dpng 2: Ca che can bang npi moi
Muc tieu:
- HS trinh bay dugc cac ca che' cin bing npi mdi.