1. which one of these is not an example of intracellular communication?

a nerve cell stimulates a muscle cell to contract.

a signal is translated to cause muscle contraction.

a muscle cell action is coordinated.

a muscle cell maintains homeostasis.

2. when non-nerve cells become involved in response to signals, which type of receptor goes into action?

enzyme-linked receptor

ion channel-linked receptor

intracellular receptor

endomembrane receptor