Cell Transport ACTIVE TRANSPORT Active transport Passive Standard

  • Slides: 23
Download presentation
Cell Transport: ACTIVE TRANSPORT Active transport Passive

Cell Transport: ACTIVE TRANSPORT Active transport Passive

Standard S 7 L 2. a. Explain that cells take in nutrients in order

Standard S 7 L 2. a. Explain that cells take in nutrients in order to grow and divide and to make needed materials. S 7 L 2. d. Explain that tissues, organs, and organ systems serve the needs cells have for oxygen, food, and waste removal.

1. Active Transport • Unlike passive transport which does NOT require energy, active transport

1. Active Transport • Unlike passive transport which does NOT require energy, active transport DOES require energy. • Active transport requires the molecule ATP for energy. • This molecule is produced in the mitochondria.

2. Transport Proteins • Active transport uses transport proteins. • In active transport, molecules

2. Transport Proteins • Active transport uses transport proteins. • In active transport, molecules move from areas of low concentration to areas of high concentration. • This is opposite of passive transport.

What happens? • Transport proteins bind with large molecules. • cellular energy is used

What happens? • Transport proteins bind with large molecules. • cellular energy is used to move through membrane.

Draw this example under #2 Cell membrane low (ATP) high

Draw this example under #2 Cell membrane low (ATP) high

3. Concentration Gradient • Molecules move against the gradient from low to high. •

3. Concentration Gradient • Molecules move against the gradient from low to high. • The transport protein releases the molecule. • The transport protein is free to bind with another molecule.

Stop and Review Active transport involves: • Uses energy molecule ATP • Uses transport

Stop and Review Active transport involves: • Uses energy molecule ATP • Uses transport proteins. • Molecules move from a low concentration to a high concentration against the gradient.

 • When would a cell need active transport to move nutrients and/or waste

• When would a cell need active transport to move nutrients and/or waste from a cell? – When the molecules are too large to pass through the cell membrane and too large for a transport protein.

4. So what happens if… a particle is too large for a transport protein

4. So what happens if… a particle is too large for a transport protein to assist it through the cell membrane? See next slide for answer. .

ENDOCYTOSIS and EXOCYTOSIS

ENDOCYTOSIS and EXOCYTOSIS

5. Endocytosis • Endocytosis is the process of taking substances into a cell by

5. Endocytosis • Endocytosis is the process of taking substances into a cell by surrounding it with the cell membrane. • This creates a vacuole or vesicle (which is a small vacuole) that contains the particle. Draw slide on next page…

Draw this picture of endocytosis High concentration of solute Uses ATP Cell membrane Vacuole/vesicle

Draw this picture of endocytosis High concentration of solute Uses ATP Cell membrane Vacuole/vesicle Goes against the concentration gradient – low to high

Give this a few seconds to work!

Give this a few seconds to work!

Stop and Review • Endocytosis involves: – Bringing Large Substances INTO the Cell. –

Stop and Review • Endocytosis involves: – Bringing Large Substances INTO the Cell. – The membrane surrounding the substance is made from part of cell membrane. – Creates a vacuole/vesicle

6. Exocytosis • Exocytosis involves releasing the contents of a vesicle/vacuole out of the

6. Exocytosis • Exocytosis involves releasing the contents of a vesicle/vacuole out of the cell. • This occurs in the opposite way of endocytosis. • Explain this in your own words. Draw slide on next page…

Draw a picture of exocytosis Cell membrane High concentration of solute Uses ATP Particles

Draw a picture of exocytosis Cell membrane High concentration of solute Uses ATP Particles released out of cell Goes against the concentration gradient – low to high

Stop and Review Exocytosis involves: • Releasing Large Substances OUT of the Cell •

Stop and Review Exocytosis involves: • Releasing Large Substances OUT of the Cell • The membrane surrounding the substance becomes part of cell membrane after it releases it out of the cell.

Review of Endocytosis & Exocytosis

Review of Endocytosis & Exocytosis

Cell Transport Flip Book • Continue working on the cell transport flipbook you created

Cell Transport Flip Book • Continue working on the cell transport flipbook you created and complete the tabs for active transport. • Label the tabs: – Active Transport – Endocytosis – Exocytosis

For each type of transport, • write a 3 facts to explain what occurs

For each type of transport, • write a 3 facts to explain what occurs in each type of transport. • draw what is happening in each type of transport. • You will need to work diligently on this to complete it during class.