The molecules that bind to receptors in a signalling pathway to initiate a signal are called:Group of answer choicesSecond messengersTranscription factorsSubstratesLigands

Molecules that bind to a receptor and trigger signaling pathways are called                           Group of answer choicesagonistsantagonistsIRE-binding proteinspromotersligands

A receptor that is stimulated by the binding of a chemical substance is called a

What are proteins that act in a coordinated manner with hormone receptors to mediate gene expression?    Group of answer choicescoreceptorscohormones coactivatorsreceptor-transcription mediatorscotranscription factors

What is the name of the messenger molecule that participates in endocrine communication?Group of answer choicesNeurotransmitterHormoneNeurohormoneGap junction

Identify the specific type of protein of the cell membrane that provides a binding site for chemical messengers and thus allows for intercellular communication.Multiple ChoiceReceptor moleculesCarrier moleculesEnzymesMembrane channels