Cell Membrane and Transport

A semi-permeable barrier that encloses the cell and separates its internal environment from the external surroundings.

• Cell Membrane

• Cholesterol

• Peripheral Proteins

• Diffusion

Tags

NGSS.MS-LS1-2

A double layer of phospholipid molecules that makes up the basic structure of the cell membrane.

• Permeable

• Proteins Channel

• Phospholipid Bilayer

• Isotonic

Tags

NGSS.MS-LS1-2

Which definition describes Passive Transport

• The passive movement of molecules from areas of high concentration to areas of low concentration until equilibrium is reached.

• The energy-dependent movement of molecules against their concentration gradient

• 9. A solution with the same solute concentration as the cell, resulting in no net movement of water.

• The movement of substances across the cell membrane without the expenditure of energy. It includes diffusion, osmosis, and facilitated diffusion

Match the definition for Active Transport

• Proteins that are firmly embedded within the lipid bilayer

• The movement of substances across the cell membrane without the expenditure of energy.

• The energy-dependent movement of molecules against their concentration gradient using transport proteins,

• The property of the cell membrane that allows it to control the movement of substances in and out of the cell.

Transport proteins that form channels or pores in the membrane to allow the passage of specific ions or molecules

• Channel Proteins

• Lipid bilayer

• Cholesterol

• Isotonic Solution

What is the definition of Diffusion

• A specific type of diffusion involving the movement of water molecules across a selectively permeable membrane.

• The current model used to describe the cell membrane,

• Proteins that are firmly embedded within the lipid bilayer

• The passive movement of molecules from areas of high concentration to areas of low concentration until equilibrium is reached.

A specific type of diffusion involving the movement of water molecules across a selectively permeable membrane.

• Osmosis

• Diffusion

• Facilitated Diffusion

• Concentration Gradient

What is the definition of Cholesterol

• type of endocytosis in which cells engulf solid particles, such as bacteria or debris.

• The current model used to describe the cell membrane, which depicts it as a dynamic and flexible structure.

• A lipid molecule found within the phospholipid bilayer, which helps maintain the membrane's fluidity and stability.

• Proteins that are loosely attached to the membrane's surface and play various roles in cell signaling, structure, and transport.

The heads of Phospholipid Bilayer ​ ​ (a)   While the tails are ​ (b)  

• Hydrophobic
• Hydrophilic

When the Cell Membrane brings materials inside the Plasma membrane​ (a)   When the Fluid Mosaic expels​ materials outside it called (b)   ​ (hint ATP is occurring for both)

• Endocytosis
• Exocytosis