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WorksheetsMembrane transport
Total questions: 28
Worksheet time: 25mins
active transport
Examples of particles that can diffuse across through the phospholipid bilayer include:
oxygen and carbon dioxide
sugar
water
calcium ions
when some molecules can cross the membrane while others cannot.
The sodium potassium pump usually pumps
potassium out of the cell and sodium into the cell
sodium out of the cell and potassium into the cell
sodium into the cell and water out of the cell
both potassium and sodium into the cell
Which factor does not affect the rate of diffusion
molecule size
molecule color
molecule concentration
temperature
During active transport molecules move
with the concentration gradient
against the concentration gradient
they are in equilibrium
only out of the cell
What is the movement of particles with the concentration gradient using protein "helpers" aid in moving glucose or amino acids across the membrane?
diffusion
facilitated diffusion
active transport
enzymatic reactions
An example of facilitated diffusion is
CO2 and O2 exchange in the lungs
Glucose transport
Na+ / K+ Pumps
Endocytosis
When a cell is in equilibrium there is
no movement of molecules across the membrane
molecules still may move back and forth across the membrane in equal amounts
molecules can only move out of the cell
molecules can move down the concentration gradient
