- Dissolve oxygen moves from high concentrations to low concentrations. - Dissolve oxygen will travel along its concentration gradient until equilibrium is reached. - Dissolve oxygen can pass freely through the cytoplasmic membrane.
ATP is not required in passive transport of a chemical because ________________________________.
it occurs along that chemical's concentration gradient.
What is the function of permeases in specific facilitated diffusion?
It permits only one type of molecule to pass through the cytoplasmic membrane.
Osmosis is _______________________________.
the diffusion of water.
If a cell is placed in a high salt environment, what is likely to happen?
The cell will lose its interior water, shrivel up, and die.
Which of the following methods of passive transport does not require a permease?
- simple diffusion
Why does active transport require the expenditure of energy?
Active transport involves the transfer of material against the concentration gradient.
Which type of active transport protein is an example of coupled transport?
What is a characteristic that all forms of active transport share?
They use transport proteins to facilitate the transport of material
Which type of transport protein brings material into and out of the cell?
uniport and symport
Which type of active transport transports only one type of material?
From which phrase is the term "prions" derived?
proteinaceous infectious particles
How do prions replicate?
They cause normal proteins to misfold into infectious proteins
How are prions different from other infectious agents?