Cau 25: hormon FSH va LH: ban chat, tac dung, dieu hoa bai tiet va UDLS

*) ban chat hoa hoc: ca FSH va LH deu la glycoprotein. FSH dc cau tao boi 236 acid amin voi trong lg ptu 32000, con LH co 215 acid amin va trong lg ptu la 30.000.

*) tac dung:

- tac dung len tuyen sinh duc nam(tinh hoan)

+) FSH:

. kick thick ong sinh tinh phat trien

. kick thck TB sertoli nam o thanh ong sinh tinh phat trien va bai tiet cac chat tham gia vao qtrinh san sinh tinh trung

+) LH:

. kick thick TB tuyen ke Leydig phat trien

. kick thick TB leydig bai tiet testosteron

- tac dung len tuyen sinh duc nu( buong trung)

+) FSH: kick thick cac nang no•n phat trien db la kick thik tan gsinh lop TB hat de tu do tao thanh lop vo cua nang no•n

+) LH:

. phoi hop voi FSH lam phat trien nang no•n tien toi chin

. phoi hop voi FSH gay htuong phong no•n

. khick thick nhung TB hat va lop vo con lai ptrien thanh hoang the

. kick thick lop TB hat cua nang no•n va hoang the bai tiet estrogen va progesteron

*) Dieu hoa bai tiet:

- do tac dung kick thick cua hormon vung duoi doi GnRH

-do tac dung dieu hoa ngc cua hormon sinh duc: testosteron, estrogen, progesteron. Khi cac hormon nay tang thi uc che tuyen yen va ngc lai neu Cm cac hormon nay giam se kick thick tuyen yen bai tiet nhieu FSH va LH.