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