Cell Membrane Homeostasis

What is a concentration gradient?

• When there is a difference in concentrations between two areas of a solution/two sides of a membrane

• Where there is a change in concentration over a period of time between two sides of a membrane

• A gradient, or sloped line, showing how concentration decreases over time

• A gradient, or sloped line, showing how concentration increases over time

Tags

NGSS.HS-LS2-5

Active transport is transport that requires...

• Sodium ions

• Energy

• Force

• Diffusion

Which method of transport is used by iron ions?

• Diffusion

• Facilitated Diffusion

• Endocytosis

• Exocytosis

What does a cell need to transport particles by active transport?

• Sun

• Wind

• Energy

• Channels

Lipid tails are...

• Hydrophobic

• Hydrophilic

When looking at the cell membrane, where are the lipid tails located?

• Inner part of the bilayer

• Outer part of the bilayer

• At the end of the bilayer

• Goes through each end of the bilayer

Osmosis is the diffusion of __________.

• water

• glucose

• air

• passive transport

A person should never drink salty water because their cells would

• shrink

• expand

Tags

NGSS.HS-LS1-3

An ISOTONIC solution has a(n) ______________ concentration of solute (dissolved stuff) than inside the cell.

• lower

• equal

• higher

A HYPOTONIC solution has a ______________ concentration of solute (dissolved stuff) than inside the cell.

• lower

• equal

• higher