Cell Transport Lesson

Cell Transport Lesson

By Ms. Q

​Cell Transport

Cell transport is movement of materials across cell membranes.

​

Two Types:​

1. Passive transport

   ​

2. Active transport

​The movement of substances across the cell membrane without using energy from the cell.

​Examples:

1. diffusion

2. facilitated diffusion

3. osmosis.

​​

​(does not require energy​)

​​Passive Transport

​Diffusion is the movement of particles from a area of higher concentration to an area of lower concentration.

​beginning

​after 5 mins

Examples of diffusion in everyday life:​​

1. The smell of perfumes or incense sticks.

2. Opening the soda or cold drinks bottle and the CO₂ diffuses in the air.

3. Dipping the tea bags in hot water will diffuse the tea in hot water.

4. Small dust particles or smoke diffuse into the air and cause air pollution.

5. Breathing and taking oxygen into the body and diffuses in our blood.

Multiple Choice

What process occurs when WATER diffuses across a membrane?

• endocytosis

• mitosis

• osmosis

• nuclear fission 

Multiple Choice

When particles move from areas of high concentration to areas less concentrated, this has taken place.

• diffusion

• mitosis

• endocytosis

• photosynthesis

Multiple Choice

Why is diffusion and osmosis important to cells?

• It allows them to take in materials without using energy.

• It allows them to reproduce.

• It allows them to absorb sunlight.

• It allows cells to use all energy.

Multiple Choice

Where is there a low concentration of dye?

• at the bottom of cup

• in the color

• at the top of cup 

• no concenteraion gradient

Multiple Choice

During osmosis

• water moves from high to low concentration

• large or oddly shaped molecules move across a cell membrane

• water moves when energy is used

• proteins are built

Multiple Choice

Movement of particles from high to low concentration. 

• Passive Transport

• Active Transport