Sinh Ly Tieu Hoa Flashcards
Don vi chuc nang cua gan
Tieu thuy gan:
- hinh tru: giua la tn trù tam tieu thuy, xung quanh la be te bao gan (2 lop te bao)- tieu quan mat nam giua
Tb gan nam giua :tieu quan mat va mau tròng mao mach dang xoang
- giua cac tb gan: tm cua, dm gan, ong mat, bach huyet! T
- tm trung tam tieu thuy- tm gan - tm chu duoi
Mm dang xoang: tb noi mo- kuffer- khoang Disse- thog thuong voi mach bach huyet!
Chuc nang he thong tuan hoan gan
Du tru mau
He dem
Loc mau
Du tru mau/gan
- tm cua 1l mau + dm gan 400 ml: 29% CO
- he mach cua gan ( tm, mm, dm) chua: 650 ml! Tang ap luc nhi P, anh huong nguoc lai gan, mau co chua trong tm va mm kieu xoang len den 1l
Chuc nang dem|gan
Mao mach kieu xoang co tinh tham rat manh
Dd tu he tieu hoa- nhanh xhog vao khoang ke cua gan- khong tang qua cao trong tuan hoan sau bua an- gan chuyen hoa va phong thoch vao mau voi nong do nhat dinh
Chuc nang loc| gan
Tb kuffer : loc vk tu tm cua ( mau cua duong tieu hoa)–) rat it vk qua khoi hang rao nay
Hau qua cua ap suat cao trong tm gan
Tm gan-chu: 0
Tm cua: 8 mmHg
–) suc can voi luu luong mau tu tm cua la khog dang ke
Tb gan xo–) mm bi hep–) tro ngai dong mau u tm cua vao gan!
Ap luc tm gan tang–) tang luu luong bach huyey–) tham qua bao gan: co truong
Bai tiet mat/gan
Moi tb gan deu bai tiet mat–) ong nho den lon–) omc–) ta trang va tui mat - co that òddi
Du tru mat trong tui mat
Luong mat tiet mot ngay: 700-1100ml
Tui mat: 40-70ml
Tui may du tru mat trog 12h do kha nang co dac mat( hap thu chu dong nuoc, nacl₫
Y
Co che tiet mat sau an
Tui mat co bop: -cholecystokiniin - day x Gian truong luc co oddi: - px mat-ruot - nhu dong ruot non
Thanh phan mat
Muoi mat(50%) Bili Lẽci Choles Muoi khoang
Chole 1-2 g/d! Ko tan trong nuoc, tan tròn micelle
Tao acid may nguyennphat- thu phat
Acid mat nguyen phat ( a cholic, chenodeoxycholic)–) gan glycin va taurin tao muoi mat
Trog ta trang: tao acid mat thu phat ( a deoxycholic, a lithocholic)
Chuc nang muoi mat
- nhu tuong hoa: tang dien tich tx men lipase va mo
- hoa tan mo/nuoc
Ruot: tai nong do nhat dinh–) tao hat micelle( ua nuoc quay ra ngoai). San p thoai hoa cua mo nhanh chong nhap vao hat micelle!
Micel tan trong nuoc- bo bam chai tb ruot- hap thu mo qua bieu mo vak hach bach huyet
Khong muoi mat, hau qua
40% luon lipid khong dũo hap thu
Nhing hao thu cac chat tan trong mo, db la vitamin a d e k! Vit k : tong hop yeu to dong mau
Chuyen hoa mat
Mat :
- tai hap thu 90-95% hoi trang, tm cua, tro lai gan–) bai tiet lai! L
Muoi mat tai hap thu cang nhieu, thi bai tiet cang nhieu
- phan con lai ra duog tieu tieu hao
Bai tiet bilirubim
hC: -globin - hem --) biliverdin --) bili gT (tu do) - tan tròng mo-gan pro --) chuyen hoa o gan: 80% a glucuronix 10% sulfat 10% othwr --) bil tt: tan trong nuoc: vk chuyen hoa thanh urobilinogen - tai hap thu - uro: nũo tieu, sterco: phan
Chuyen hoa cacbonhydrate o gan
Du tru glycoge
Ch hoa frux/galac thanh gluc
Tao duong moi
Thanh lap nhieu phuc hop hoa hoc tu sp trung gian chuyen hoa cacbomhydrate
Chuyen hoa lipid/gan
Beta - oxy hoa acid beo: tao nang luong
Tong hop phos, choles, lipo
Tong hop mo tu pro va cac
Chuyenhoa protein/gan
Khu amin ra ketoacid–) tao nl
Tao ure tu nh3 de loai ra khoi co the
Tong hop protein (- gamma glo)
Chuyen hoa qua lai cac aa va cac phuc hop khac tu aa( tong hop aa ko thirt yeu va enzyke huyet tuong)
Du tru vitamin va muoi khoan /gan
A)d)b12 A 1ms D: 3-4m B12 12 ms Fe: apoferritin
Dog mau/gan
Dong mau ngoai sinh tru 8
Vit K: 2 7 9 10
Chuc nang cua gan
Chua va loc mau
Bai tiet mat
Chuyen hoa