Cell Membrane and Passive Transport Lesson

Passive Transport Lesson

​Beginning with a little Cell Transport terminology

Poll

A biologist has a 2.0L sample of seawater. She adds more water to the sample. This will make the solution more concentrated.

• Agree

• Disagree

Fill in the Blank

The process of how things move in and out of the cell through the cell membrane is ............

​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

Movement of particles from high to low concentration. 

• Passive Transport

• Active Transport

Multiple Choice

All of the following are functions of a cell membrane EXCEPT

• surrounding and protecting the contents of the cell.

• releasing waste products from the cell.

• producing energy for the cell processes.

• allowing gases to enter the cell.

Multiple Choice

The cell membrane assist the cell in maintaining homeostasis by..

• Coding for our traits

• providing long term energy

• Allowing molecules to move into and out of the cell as needed

• speeding up chemical reactions

Multiple Choice

Which type of passive transport uses proteins to help molecules pass through the membrane?

• Diffusion
• Facilitated diffusion
• Osmosis
• All of the above

Fill in the Blank

In which type of passive transport does WATER move across the membrane to balance concentrations?

Multiple Choice

Passive Transport

• Does require cell energy

• Does NOT require cell energy

Multiple Choice

Which of the following moves with the concentration gradient?

• Active Transport
• Phagocytosis
• Pinocytosis
• Diffusion 

Multiple Choice

What biomolecule is number one pointing to?

• Lipid

• Protein

• Nucleic Acid

• Carbohydrate