35259006
Beschreibung
Quiz von Alexandre Wolf, aktualisiert more than 1 year ago
|
Erstellt von Alexandre Wolf
vor mehr als 2 Jahre
|
|
Frage 1
Frage
Osmosis moves water according to the same concepts that guide passive
transport. As water functions as a solvent, the passive flow of water:
Antworten
-
Water is only transported actively
-
Moves from regions of high solute concentrations to low solute concentrations
-
Moves from regions of low solute concentrations to high solute concentrations
-
water has no net flow
Frage 2
Frage
Electrochemical gradients take both the concentration of the molecule in
question, as well as its':
Antworten
-
Charge
-
Hydrophobicity
-
Size
-
Channel protein abundance
Frage 3
Frage
Passive transport involves molecules moving:
Antworten
-
Down their concentration gradient
-
Up their concentration gradient
-
With the use of highly energetic compounds (i.e. ATP)
-
Together with other cargo molecules
Frage 4
Frage
What prevents other positively charged ions from passing through a K+ channel?
Antworten
-
The specific residues of the K+ channel allow water to pass the K+ ion through the water chain, but do not allow water to pass different ions
-
Positively charged residues in the channel push K+ ions perfectly through the pore, while other positive ions are the wrong size to pass through the passage
-
When ions other than K+ enter the channel, the protein structure changes and closes the passage through the membrane
-
The structure of the K+ channel fully stabilizes K+, thereby stripping away water molecules. Other ions do not fit perfectly, and therefore are more favorably associated with water.
Möchten Sie mit GoConqr kostenlos Ihre eigenen Quiz erstellen? eigenen Mehr erfahren.