Term
| which two major systems regulate homeostatis? |
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Definition
| the nervous and endocrine system |
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Term
| what is the name of the regulatory chemical secreted into the blood by an endocrine gland? |
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Definition
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Term
| only certain organs called target organs respond to the presence of a specific hormone. this is because?... |
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Definition
| they have the appropiate receptors |
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Term
| which intercellular regulators exert very local effects? |
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Definition
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Term
| water soluble molecules cannot pass through the plasma membrane. what must they rely on to mediate their action within the target cell? |
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Definition
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Term
which type of homone can do the following?
- hormone molecules pass through target cells plasma membrane
- hormones bind to intercellular receptor proteins
- hormone-receptor complex binds to specific regions of DNA
- the hormone-receptor complex activates genes, producing action in target cells
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Definition
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Term
which of the following does not represent a category of hormones:
- second messengers
- polypeptides
- glycoproteins
- amines
- steroids
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Definition
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Term
which molecule is not involved in the second messenger system of adrenaline?
- G protein
- adenyl cyclase
- prostoglandin
- protein kinase
- cyclic AMP
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Definition
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Term
which example is a hormone that exerts its action within the target cell only by binding with cell surface receptors?
- insulin
- cortisol
- testosteron
- progestorone
- oestrogen
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Definition
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Term
a molecule that can act both as a hormone and neurotransmitter
- oestrogen
- progestorone
- thyroxine
- noradrenaline (norepinephrine)
- insulin
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Definition
noradrenaline (norepinephrine)
noradrenaline acts both as a neurotransmitter and a hormone synthesised by the adrenal medulla |
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