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

answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

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before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.