Test Bank For Principles of Human Physiology, 6th Edition

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ExamName___________________________________MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.1)In chemical communication between cells, a ________ cell secretes a chemical messenger that bindsto ________ on the ________ cell.1)A)secretory : connexons : gapB)secretory : connexons : targetC)gap : connexons : secretoryD)target : receptors : secretoryE)secretory : receptors : targetAnswer:E2)Direct communication between cells in contact with one another is accomplished through2)A)receptors.B)endocrine hormones.C)gap junctions.D)ligands.E)paracrine chemical messengers.Answer:C3)The number of bound receptors on a target cell depends on what two things?3)A)the concentration of the messenger and the distance it has to travelB)the type and concentration of receptorsC)the concentration of the messenger and signal transductionD)the secretory cell and target cellE)the concentration of the messenger and the concentration of receptors on the target cellAnswer:E4)Which type of chemical messenger, when released, binds to receptors on the cell that released thechemical messenger?4)A)neurohormoneB)autocrineC)cytokineD)neurotransmitterE)hormoneAnswer:B5)Which type of chemical messenger is released into the bloodstream by an endocrine gland where itcan affect target cells throughout the body?5)A)paracrineB)cytokineC)neurotransmitterD)hormoneE)autocrineAnswer:D1

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