Steroli Flashcards

1
Q

klasifikacija sterolov kot lipidov

A

membranski lipidi

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2
Q

strukturne značilnosti sterolov

A

1) CP-PH-FA skele
2) -OH skupina na C3
3) nepolaren alifatski rep na C17
4) dvojna vez na B obroču

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3
Q

največji sterol pri človeku

A

holesterol (27 C)

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4
Q

rastlinski steroli

A

fitosteroli (stigmasteroli, sitosteroli, kampesteroli)

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5
Q

učinek fitosterolov na telo

A

znižujejo absorpcijo holesterola v črevesju in koncentracijo serumskega holesterola in s tem ščitijo pred kardiovaskularnimi boleznimi

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6
Q

glivni sterol

A

ergosterol

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7
Q

lipidni raft

A

območje rigidne mikrodomene membran, bogato s sfingozinom, holesterolom in proteini z GPI-sidrom

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8
Q

vpliv visoke koncentracije holesterola na telo

A

celice holesterol pridobijo iz LDL delcev, ki na steni žil lahko tvorijo aterosklerozni plak in s tem zmanjšujejo lumen žil

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9
Q

molekule, ki nastajajo iz holesterola

A

vitamin D, steroidni hormni, estri holesterola, oksisteroli, žolčne kisline

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