Conversely, when the fat content of the blood rises above the set point, the hypothalamus decreases the desire to eat. Much as a thermostat regulates heat, the hypothalamus helps regulates the amount of at in the body. [Source: Reading for Results Ninth Edition by Laraine Flemming]
I don't think "Much as a thermostat regulates heat" is a concessive clause; if anything, I think the comparison clause "Much as a thermostat regulates heat" is preposed from after "the hypothalamus helps regulates the amount of at in the body." And I'd like to know if my assumption is right.
Top answer
Concessive clauses express some kind of contrast; there is no contrast here, but a comparison of similar things. The bold part could be put at the front or end, depending on stylistic preference or requirements of emphasis.
— GPY
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