2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Kev yoog rau bipedalism suav nrog " stacking" feem ntau ntawm qhov hnyav ntawm lub cev hla thaj chaw me me nyob ib ncig ntawm qhov chaw ntawm lub ntiajteb txawj nqus(piv txwv li, lub taub hau saum lub hauv siab, uas yog saum lub pelvis, uas yog tshaj lub hauv caug, uas yog saum ko taw).
Yuav ua li cas tib neeg lub cev pob txha hloov mus rau bipedalism?
Cov kab vertebral ntawm tib neeg siv ib qho rau pem hauv ntej khoov hauv lub lumbar (qis) cheeb tsam thiab rov qab khoov hauv cheeb tsam thoracic (sab sauv). Yog tsis muaj lub lumbar nkhaus, lub vertebral kem yuav ib txwm lean rau pem hauv ntej, ib txoj hauj lwm uas yuav tsum tau ntau npaum li cas cov nqaij ntshiv rau cov tsiaj bipedal.
Puas yog bipedalism yog kev hloov kho?
Bipedalism yog ib qho qhov tseem ceeb hloov pauv ntawm Hominin progenyuas suav tias yog lub zog loj tom qab ntau qhov kev hloov pauv ntawm lub cev sib koom los ntawm txhua tus bipedal hominins (Lovejoy 1988. … Muaj cov kev xav sib txawv uas. piav qhia yuav ua li cas thiab yog vim li cas bipedalism hloov zuj zus nyob rau hauv tib neeg.
pob txha bipedal yog dab tsi?
Bipedalism, ib hom kev ua haujlwm loj, koom nrog kev txav mus los ntawm ob ko taw. Skeletons Ntawm Tib Neeg Thiab Gorillas Muab piv.
Ib co piv txwv ntawm bipedalism yog dab tsi?
Tib neeg, noog, ntau lizards thiab (ntawm lawv qhov siab tshaj plaws) cockroaches khiav bipedally. Kangaroos, qee cov nas thiab ntau cov noog dhia bipedally, thiab jerboas thiab crows siv kev hla mus. Daim ntawv no tsuas yog hais txog kev taug kevthiab khiav bipeds. Chimpanzees taug kev nrog lawv lub hauv caug khoov thiab lawv nraub qaum nqes mus rau pem hauv ntej.
Pom zoo:
Dab tsi ua kom pob txha pob txha ntawm cov pob qij txha?
pob txha muab cov duab, txhawb nqa, thiab qauv rau lwm cov ntaub so ntswg hauv lub cev. Nws kuj yuav pab tau cov pob qij txha. Pob txha mos kuj smoothens cov pob txha nto ntawm cov pob qij txha. Cov ntaub so ntswg dab tsi npog cov pob txha ntawm cov pob qij txha?
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Dab tsi qhov sib txawv ntawm cov pob txha pob txha thiab pob txha?
Cov pob txha pob txha yog tsim los ntawm osteons thiab tsim cov txheej txheem sab nraud ntawm txhua pob txha. Cov pob txha pob txha yog tsim los ntawm trabeculae thiab ua rau sab hauv ntawm txhua pob txha. Dab tsi yog qhov sib txawv ntawm cov pob txha pob txha thiab pob txha pob txha?
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
Puas yog lub pob txha pob txha pob txha pob txha?
CONCLUSIONS: vertebral endplate raug mob feem ntau pom hauv osteoporotic vertebral compression fractures. Dab tsi ua rau lub pob txha tawg? Nws yog kev xav tias, nyob rau hauv ntau qhov mob ntawm qhov mob qis qis, thawj qhov ua rau mob yog pob txha ntawm pob txha caj qaum los ntawm compression rog.
