G6D: Cellular Transport

G6D:

​The Cell Membrane is SELECTIVELY PERMEABLE!

​This means that only certain substances can enter or leave the cell.

​

​Just like the gif to the right, only the smaller blue substances can enter and leave the cell, but the green ones cannot.

​Passive Transport:

• ​Does NOT require energy!

• Moves particles from an area of high concentration to an area of low concentratio

Multiple Choice

Which is true of passive transport? 

• It requies energy (ATP)

• It does not require energy.

  (ATP) 

Multiple Choice

Passive transport moves particles from an area of ___  concentratin to an area of ___ concentration.

• low, high

• high, low

• it's all equal.

​Passive Transport Examples:

​1. Simple Diffusion

​2. Facilitated Diffusion

​3. Osmosis

​Passive Transport: Simple Diffusion

​Simple diffusion allows smaller particles, like oxygen and carbon dioxide, to move through the phospholipid bilayer without assistance.

​Substances move with the concentration gradient. This means they move from high to low concentration.

​Passive Transport: Facilitated Diffusion

​Facilitated Diffusion allows carbohydrates, amino acids, nucleosides, and ions to pass through the cell membrane USING PROTEINS as a doorway.

​Passive Transport: Osmosis

​Osmosis is the diffusion of WATER across the phospholipid bilayer of the cell membrane.

​The smaller particles are water molecules.

Multiple Choice

Which type of passive transport requires the use of a protein? 

• simple diffusion

• facilitated diffusion

• osmosis

• none of these.

Multiple Choice

What is the concentration gradient?

• When particles move from low to high concentration.

• When particles move from high to low contration.

Multiple Choice

Which type of passive transport moves substances like oxygen and carbon dioxide through the phospholipid bilayer?

• simple diffusion

• facilitated diffusion

• osmosis

Multiple Choice

Water diffuses through the cell membrane through which process?

• simple diffusion

• facilitated diffusion

• osmosis

​Active Transport

• Requires energy to move particles over the cell membrane.

​

• Moves from low to high concentration. (Against the concentration gradien

​Active Transport: Types

​1. Pumps

2. Vesicle Transport

​Active Transport: Pumps

​Active Transport: Vesicle Transport

​Nutrients including sugars, fatty acids, and amino acids use vesicles to enter and leave the cell.

​Endocytosis moves substances into the cell

​Exocytosis moves substances out of the cell

Multiple Choice

TRUE or FALSE: Active Transport uses the cells energy to move substances across the cell membrane. 

• TRUE

• FALSE

Multiple Choice

TRUE or FALSE: Active Transport moves substances from low to high concentration.

• TRUE

• FALSE

Multiple Choice

Which vesicle transports moves substances out of the cell?

• endocytosis

• ion pump

• exocytosis

Multiple Choice

Endocytosis moves substance ___.

• out of the cell

• into the cell