Phases of bacterial growth, and graphing them
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Graphing bacteria growth is difficult because of the?
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large numbers
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because of the large amounts of bacteria that are to be graphed, a special type of graphing paper must be used that is called?
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semilog graphing paper
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semilog paper for microbiology starts off with larger sections able to show the ______ differences at the beginning of bacterial growth
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small
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semilog graphing paper is called SEMI-log because its axes use different types of?
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scales
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The Y axis of semilog paper uses this scale
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logarithmic
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The X axis of semilog paper uses this scale
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arithmetic
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The 4 phases of growth are?
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lag, log, stationary, death
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The lag phase occurs right after?
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inoculation
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Why does the lag phase show little to no growth?
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microbes must adjust to new environment
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When a microbe is introduced to a new environment, to survive, it may have to produce different? (2)
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enzymes, proteins
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The log phase occurs after microbes have finished?
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adapting
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What occurs during the log phase?
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rapid reproduction
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In the log phase, reproduction can reach a CONSTANT _______?
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maximum (a hard limit)
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During log phase, bacteria are often more susceptible to?
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antimicrobial drugs
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During log phase, bacteria are often more susceptible to antimicrobial drugs that interfere with? (2)
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cell wall synthesis, metabolism
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Gram stains are best applied to microbes that are in this phase?
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log
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This phase begins once nutrients begin to deplete and metabolic waste starts to builds up
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stationary phase
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due to a lack of nutrients in the stationary phase, what is decreased? (2)
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reproduction, metabolism
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in stationary phase, reproduction is equal to?
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death
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Death phase begins when? (2)
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nutrients run out, metabolic waste accumulates
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In this phase cells are dying faster than they can divide
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death phase
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In death phase, population?
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decreases
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In what phase would bacteria form spore?
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between stationary and death
