abigailreagan abigailreagan
  • 09-05-2018
  • Biology
contestada

When an animal runs along the ground by flexing some of its muscles, what causes its muscles to contract?
A.
hormonal signals
B.
light signals
C.
heat impulses
D.
electrical impulses

Respuesta :

softluhs
softluhs softluhs
  • 09-05-2018
Letter A for sure! Hope I helped.
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Kayla574
Kayla574 Kayla574
  • 09-05-2018
its D, i looked it up
Answer Link

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