Qhov sib txawv tseem ceeb ntawm tonofibrils thiab tonofilaments yog tonofibrils yog cytoplasmic fibrils pom nyob rau hauv cov hlwb epithelial uas converge ntawm desmosomes thiab hemidesmosomes, muab lub moj khaum rau lub xovtooj thaum tonofilaments yog keratin intermediate filaments uas sib xyaw ua ke los ua tonofibrils.
Intermediate filaments yog cytoplasmic protein cov qauv pom nyob rau hauv eukaryotic hlwb. Cov filaments no yog qhov tseem ceeb rau kev tswj cov qauv ntawm tes. Lawv muab lub zog tensile rau lub cell. Intermediate filaments nyob rau hauv epithelial hlwb yog tsim los ntawm keratin protein. Tonofilaments yog keratin intermediate filaments pom nyob rau hauv epithelial hlwb. Bundles ntawm tonofilaments tsim ib lub tonofibril. Yog li, tonofibrils yog tsim los ntawm tonofilaments ua los ntawm 8 keratin intermediate filaments.
Tonofibrils yog dab tsi?
Desmosomes yog cov cheeb tsam ntawm cov cellular tuab ntawm cov plasma membrane ntawm cov kab mob epithelial uas nyob ib sab uas kho cov cell mus rau cell adhesion. Cov no yog cov qauv tshwj xeeb ntawm cov tsiaj hlwb. Muaj cov fibrils nyob rau hauv cytoplasmic sab ntawm desmosomes. Cov fibrils no hu ua tonofibrils. Lawv yog cov txheej txheem cytoplasmic protein uas tawm los ntawm cytoplasm thiab yog khi rau cytoskeleton. Rudolf Heidenhain nrhiav pom tonofibrils.
Daim duab 01: Tonofibrils
Tonofibrils yog tsim los ntawm keratin intermediate filaments hu ua tonofilaments. Hauv lwm lo lus, tonofilaments ua ke los tsim cov tonofibrils tuab. Raws li txoj cai, tonofibrils yog tsim los ntawm tonofilaments ua los ntawm 8 keratin intermediate filaments. Tonofibrils yog pom pob khoom ntawm keratin filaments. Lawv muab kev tiv thaiv rau kev puas tsuaj.
Dab tsi yog Tonofilaments?
Tonofilaments yog nruab nrab filaments pom nyob rau hauv cytoplasm ntawm epithelial hlwb. Tonofilaments zoo tsim nyob rau hauv lub epidermis. Lawv yog tsim los ntawm ntau yam sib txawv ntawm cov proteins uas muaj feem xyuam; keratin protein. Lawv yog kwv yees li 0.7-0.8 nm inch. Bundles ntawm tonofilaments ua ke ua ib tug tonofibril. Tonofilaments yog pom tseeb hauv cov cheeb tsam hauv qab desmosomal plaques. Lawv pab nyob rau hauv lub cytoplasm.
Daim duab 02: Tonofilaments – Keratin Intermediate Filaments
Tonofilaments cuam tshuam nrog cov protein txuas hauv lub cev hauv cov plaques ntawm sab hauv ntawm cov hlwb koom nrog desmosomes. Tonofilaments voj voog los ntawm desmosomes. Ntxiv mus, hemidesmosomes kuj cuam tshuam nrog tonofilament intermediate filaments.
Dab tsi yog qhov zoo sib xws ntawm Tonofibrils thiab Tonofilaments?
- Tonofilaments thiab tonofibrils muaj nyob rau hauv desmosomes ntawm epithelial cells.
- Ob leeg yog tsim los ntawm cov protein, tshwj xeeb tshaj yog los ntawm cov txheej txheem protein keratin.
- Qhov tseeb, lawv yog cov qauv cytoplasmic protein.
- pob khoom ntawm tonofilaments ua tonofibrils.
- Lawv koom nrog hauv lub koom haum ntawm eukaryotic cell cytoplasm.
- Ntxiv mus, lawv pab thauj mus rau lub cell cytoplasm.
- Ob leeg tonofilament thiab tonofibrils yog cov sib sau ua ke ntawm filaments.
Qhov txawv ntawm Tonofibrils thiab Tonofilaments yog dab tsi?
Tonofibrils yog protein fibrils pom nyob rau hauv cytoplasmic sab ntawm desmosomes ntawm epithelial hlwb. Tonofilaments yog keratinous intermediate filaments uas sib xyaw ua ke los tsim cov tonofibrils. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm tonofibrils thiab tonofilaments. Raws li txoj cai, tonofibrils yog pob khoom ntawm tonofilaments thaum tonofilaments yog tsim los ntawm 8 intermediate keratin filaments K5 thiab K14. Yog li, qhov no yog qhov sib txawv ntawm cov tonofibrils thiab tonofilaments. Tsis tas li ntawd, tonofibrils thiab tonofilaments yog txuas rau hauv daim nyias nyias ntawm desmosomes. Tonofibrils yog tuab dua tonofilaments thiab tonofilaments yog kwv yees li 0.7-0.8 nm inch. Yog li, qhov no yog lwm qhov sib txawv ntawm tonofibrils thiab tonofilaments.
Summary – Tonofibrils vs Tonofilaments
Tonofibrils yog tsim los ntawm cov pob ntawm keratinous intermediate filaments hu ua tonofilaments. Tonofilaments yog tsim los ntawm nruab nrab keratin filaments K5 thiab K14, Ob leeg tonofilaments thiab tonofibrils yog cov khoom ntawm cytoskeleton ntawm cov tsiaj hlwb. Lawv pom muaj nyob rau hauv desmosomes ntawm epithelial hlwb. Lawv txuas mus rau sab hauv daim nyias nyias ntawm desmosomes. Tonofibrils txhawb nqa cell rau cell adhesion thiab muab kev tiv thaiv rau abrasion. Tonofilaments cuam tshuam nrog lwm cov kab mob sib txuas hauv nruab nrog cev uas pom hauv desmosomes. Yog li, qhov no qhia txog qhov sib txawv ntawm tonofibrils thiab tonofilaments.
