If the air temperature were lowered significantly, the mouse would begin to shiver (raising the metabolic rate) to maintain body temperature.
(the air temperature; were lowered significantly; ) (the mouse; would begin; to shiver; to maintain body temperature) (shiver; raising; the metabolic rate) (the mouse; to maintain; body temperature)
the air temperature the mouse shiver the mouse
were lowered significantly would begin raising to maintain
to shiver to maintain body temperature
the metabolic rate
body temperature