4.3 Signal Transduction (II)

    Cards (11)

    • The environment is not static and organisms need to regulate pathways to respond to changes in the environment.
    • The ability to respond to stimuli is a necessary characteristic of life and key for survival.
    • Signal transduction may result in changes in gene expression and cell function.
    • Signaling pathways can change the amount of a particular protein produced and can also alter gene expression.
    • Changes in protein type and/or amount can result in a phenotype change.
    • Apoptosis (cell death/suicide) can be a response of signal transduction.
    • Signal Transduction can be used to respond to changes in the environment.
    • Quorum sensing is a signal mechanism used by bacteria.
    • In Quorum sensing bacteria releases signals to neighboring bacteria.
    • Quorum Sensing is used to detect changes in population density so that food doesn’t run out and energy can be shared well enough (within a bacteria colony)
    • Quorum Sensing allows bacteria to act as a group and respond to changes in the environment.
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