Flashcards in 2nd Quarter- MICROBIOLOGY Exam 2 Deck (149)
the lowest temperature at which an organism can live
the highest temperature at which an organism can live.
the temperature at which organism grows best.
organisms that grow best at cold temperature. Usually below 20 degrees Celsius or less than 68 degrees Fahrenheit
(CHRO- CRY- COLD)
most pathogens - bacteria that prefer medium temperature. Usually between 20 - 40 degrees C. The optimum of most pathogens is normal body temperature of 98.6 F or 37 C. When the body temperature goes up (fever) it does so to kill the organism.
helps to kill most pathogens that like medium temperature.
The optimum of most pathogens is normal body temperature of
98.6 F or 37 C.
organisms that grow best at warm temperatures. Usually above 40 degrees C
(THINK THERMAL UNDERWEAR TO WARM UP OR A THERMOS OF HOT COFFEE)
ultra violet light is bactericidal which means what?
will kill bacteria but will not kill all organisms because over a period of time organisms exposed to excessive amounts of ultra violet light will genetically mutate and develop resistance.
Ultraviolet light which ___________ be seen will ______ bacteria
Deals primarily with solutions.
deals with something you cannot see without a microscope.
(Osmosis- diffusion through membranes)
the substance or solution dealing with osmotic pressure present in greater quantity
the substance or solution dealing with osmotic pressure present in lesser quantity
name the different osmotic pressure
is the type of Osmotic Pressure necessary to properly study bacterial cells and red blood cells to ensure no change in size, shape, and volume
the number of particles entering the cell roughly equals the number of particles leaving. The shape and integrity of the cell is maintained
excess solute. If a bacteria is placed in this type of solution it changes the shape of the cell. There will be more particles leaving than entering. The end result – the cell will atrophy
to wrinkle or shrink
the shrinkage of a bacterial cell when placed in a Hypertonic Solution
the shrinkage of a red blood cell when placed in a Hypertonic Solution
beneath or below - less solute than normal. If a bacteria cell is placed in this solution, more particles will enter the cell than leave
The bursting of a bacterial cell when placed in Hypotonic Solution
(MOP) mop below the counter surface
The bursting of a red blood cell when placed in Hypotonic Solution
living organisms living together
relationship of two or more organisms that is of benefit to all involved
relationship of two or more organisms that is of benefit to one w/ no effect to the other e.g. normal flora (living in on the human body)
relationship between two or more organisms which is of benefit to one, harmful to the other.
a relationship between two or more organisms which produces an effect, be it good or bad, not possible by each one alone. Both parties have to do their part.
a relationship between two or more organisms in which the presence of one inhibits or prevents the growth of the other; mutual opposition or contrary action.