Pressure and biological association Flashcards
Pressure that develops when two solutions of different concentrations are separated by a semipermeable membrane
Osmotic pressure.
Ex. Highly concentrate salt solutions can slow down microbial growth and inhibit decomposition of proteins (why lunch meats are so high in sodium)
when solution outside the cell is highly concentrated and the water inside the bacteria is drawn out and into the external fluid
Hypertonic (concentrated) solution.
Ex. shrunken (crenated) red blood cell
when solution outside the cell is dilute and the bacteria will draw water in
Hypotonic (dilute) solution.
Ex. swollen red blood cell
when solution outside cell is the same concentration as the cell
Isotonic (normal) solution.
Ex. normal red blood cell
relationship in which in which organisms of different species live in close nutritional relationships
Symbiosis
relationship in which organisms of two different species live in close association and both benefit
Mutualism.
Ex. Clown fish and sea anemones
relationship of two organisms of different species in which one gains some benefit (protection or nourishment) and the other is not harmed or benefited
Commensalism.
Ex. Bird making a nest in a tree
relationship between two organisms in which one is harmed and the other benefits
Parasitism.
Ex. Fleas and mosquitos taking blood from other organisms
organisms that are free-living; relationships are not required for survival
Non-symbiotic
the relationship between two or more microorganisms of different species in which they grow better together but can survive alone
Synergism.
Ex. intestinal bacteria and animals. Insects and fungi
mutual opposition or contrary action; the inhibition of one microorganism by another
Antagonism.
Ex. Predator and prey. Those fucking lantern flies
