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Critical Thinking Questions

BiologyCritical Thinking Questions


What is the difference between intracellular signaling and intercellular signaling?


How are the effects of paracrine signaling limited to an area near the signaling cells?


What are the differences between internal receptors and cell-surface receptors?


Cells grown in the laboratory are mixed with a dye molecule that is unable to pass through the plasma membrane. If a ligand is added to the cells, observations show that the dye enters the cells. What type of receptor did the ligand bind to on the cell surface?


The same second messengers are used in many different cells, but the response to second messengers is different in each cell. How is this possible?


What would happen if the intracellular domain of a cell-surface receptor was switched with the domain from another receptor?


What is a possible result of a mutation in a kinase that controls a pathway that stimulates cell growth?


How does the extracellular matrix control the growth of cells?


What characteristics make yeasts a good model for learning about signaling in humans?


Why is signaling in multicellular organisms more complicated than signaling in single-celled organisms?

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