Hormoni Flashcards

1
Q

de la ce sunt sintetizati hormonii?

A

precursori

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2
Q

cum sunt transportati hormonii?

A

in sange, de o proteina transportatoare

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3
Q

denumire hormoni in regnul vegetal

A

fitohormoni sau factori de crestere

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4
Q

cum sunt transportati hormonii din regnul vegetal?

A

prin seva si direct intre peretii celulelor

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5
Q

clase de hormoni din punct de vedere al hidrofiliei

A

hormoni hidrofili si lipofili

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6
Q

tipuri de hormoni peptidici

A

proteine (insulina)
glicoproteine (FSH si LH)

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7
Q

tipuri de hormoni non-peptidici

A

lipidici sau fosfolipidici (derivati din acidul linoleic, arahidonic, fosfolipide, eicosanoide, prostaglandine)

sterolici (hormoni corticosteroizi: prednizon, hidrocortizon)

monoamine (derivate din AA prin decarboxilare: dopamina)

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8
Q

ce caracter legat de insulina este redat prin structura sa tertiara?

A

AA polari la exterior, cei nepolari la interior => efectul hidrofob

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9
Q

deosebiri hormoni animali si fitohormoni

A

secretie nu este asigurata de organe specializate

efectul este in functie de concentratie (auxina contribuie la cresterea radacinii plantei, dar in concentratie mare inhiba cresterea)

actioneaza intotdeauna mai multi hormoni pentru a provoca acelasi efect

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