Qhov sib txawv tseem ceeb ntawm Alpha thiab Beta hlwb yog Alpha hlwb (lossis A hlwb) tsim thiab tso cov tshuaj glucagon thaum Beta hlwb (lossis B hlwb) tsim thiab tso cov tshuaj insulin.
pancreas yog ib qho ntawm cov kabmob tseem ceeb nyob hauv lub plab ntawm peb lub cev. Pancreas ua tiav ob lub luag haujlwm tseem ceeb xws li endocrine (kev tswj hwm ntshav qab zib) thiab exocrine (kev zom zaub mov) ua haujlwm. Exocrine pancreas secretes cov enzymes tseem ceeb xws li pepsin, trypsin, chymotrypsin, amylase, lipase, thiab lwm yam uas pab hauv kev zom cov zaub mov uas peb noj. Cov kab mob endocrine muaj cov cell uas tsim thiab tso cov tshuaj hormones xws li glucagon, insulin, somatostatin, thiab lwm yam. Cov hlwb no muaj xws li cov cell me me hu ua islets. Muaj kwv yees li ib lab islets nyob rau hauv tib neeg pancreas. Pancreas islets muaj peb hom hlwb uas tsim cov khoom endocrine sib txawv. Lawv yog alpha hlwb (A hlwb), beta hlwb (B hlwb) thiab delta hlwb (D cells).
Alpha Cells yog dab tsi?
Pancreas islets tsev peb hom hlwb, thiab ntawm lawv, alpha cells lossis A hlwb yog ib hom. Tawm ntawm tag nrho cov hlwb hauv cov islets, alpha hlwb suav txog 33 - 46%. Alpha hlwb tsim thiab tso tawm glucagon hormone.
Daim duab 01: Alpha Cells
Glucagon yog peptide hormone uas ua rau lub luag haujlwm nce ntshav qabzib. Glucagons khi nrog cov receptors hauv lub siab lossis lub raum hlwb. Kev sib txuas ntawm glucagons nrog receptors activates lub enzyme hu ua glycogen phosphorylase. Glycogen phosphorylase catalyzes hydrolysis ntawm glycogen rau hauv qabzib. Qhov kev hloov pauv no nce qib ntshav qabzib.
Beta Cells yog dab tsi?
Beta hlwb yog hom thib ob ntawm cov hlwb hauv cov islets ntawm pancreas. Lawv yog hom cell ntau tshaj plaws thiab lawv suav txog 65 - 80% ntawm tag nrho cov hlwb. Cov hlwb no nyob hauv nruab nrab ntawm cov islets thiab alpha thiab delta hlwb nyob ib puag ncig lawv. Beta hlwb tsim thiab tso tawm cov tshuaj insulin. Cov tshuaj insulin yog lub luag haujlwm los txo cov ntshav qabzib.
Tsis tas li ntawd, beta hlwb zais lwm cov tshuaj hormones xws li C-peptide thiab Amylin. Amylin txo qis tus nqi ntawm cov piam thaj nkag mus rau hauv cov hlab ntsha thaum C - peptides pab tiv thaiv cov hlab ntsha thiab lwm yam vascular deterioration cov tsos mob ntawm ntshav qab zib mellitus.
Dab tsi zoo sib xws ntawm Alpha thiab Beta Cells?
- Alpha thiab Beta hlwb yog ob hom hlwb nyob hauv pancreas.
- Lawv nyob hauv cov kab mob pancreas.
- ob leeg tsim thiab tso cov tshuaj hormones.
Qhov txawv ntawm Alpha thiab Beta Cells yog dab tsi?
Alpha thiab beta hlwb yog ob hom endocrine pancreas cell. Lawv tsim cov tshuaj hormones glucagon thiab insulin feem. Qhov no yog qhov sib txawv tseem ceeb ntawm Alpha thiab Beta hlwb. Tsis tas li ntawd, Beta hlwb yog cov hlwb uas muaj ntau tshaj plaws hauv islets. Lawv nyob ntau dua 70% ntawm tag nrho cov hlwb. Alpha hlwb suav txog li 20%.
Summary – Alpha vs Beta Cells
Tawm ntawm peb hom cell loj tam sim no hauv islets ntawm pancreas, alpha thiab beta hlwb yog ob hom. Alpha hlwb tsim thiab tso cov tshuaj hu ua glucagon thaum beta hlwb tsim thiab tso cov tshuaj insulin. Beta hlwb yog hom cell uas muaj ntau tshaj plaws hauv cov islets, thiab lawv nyob hauv nruab nrab ntawm cov islets uas nyob ib puag ncig los ntawm alpha thiab delta hlwb. Qhov no yog qhov txawv ntawm alpha thiab beta hlwb.
