Effect Of Osmotic Pressures- Lab 9 Flashcards Preview

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Flashcards in Effect Of Osmotic Pressures- Lab 9 Deck (8)
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1

Describe hypotonic solution

If there are more solutes inside the cell. As water enters, the cell expands. If the cell expands too much risking of burst called osmotic lysis.
Most bacteria live in hypotonic conditions.

2

Describe hypertonic solutions

If there are more solutes inside the cell, water will flow out of the cell to dilute the solutes. As water leaves, the cell dehydrates in shrinks called plasmolysis.
This is used to inhibit bacterial growth.

3

Describe facultative halophiles

No Salt in moderate salt
NaCl up to 10% or higher

4

Describe obligate halophiles

High salt conditions
NaCl at least 9%
can live in saturated salt

5

Why did staphylococcus epidermidis have the widest range of salt tolerance

Because it's a bacterium that lives on the salty skin

6

Is halobacterium salinarium an obligate halophile

Yes

7

Describe isotonic solution

If the concentration of solute a on the outside of a cell equals that of the inside. (Net movement of water = zero)

8

What condition did we address in lab?

Hypertonic