Passive transport Active transport Exocytosis Endocytosis Membrane Transport.
Warm-UPmwrightsclassroom.weebly.com/uploads/2/1/7/9/... · • Active Transport Notes • Egg Lab...
Transcript of Warm-UPmwrightsclassroom.weebly.com/uploads/2/1/7/9/... · • Active Transport Notes • Egg Lab...
Warm-UP 1. Why is osmosis considered passive transport?
2. In a hypertonic environment… What will happen to the cell?
3. In a hypotonic environment…. What will happen to the cell?
• Agenda • Active Transport Notes • Egg Lab Demo • Starch and Iodine Lab • Active Transport WS • Work on Study Guide • Concept Map
The Cell Membrane and
Types of Transport
Active Transport requires energy
• Active transport is another way that substances can move through a cell membrane.
• However, in active transport molecules move against the concentration gradient (low to high) • Therefore, active transport requires energy!
• There are 2 types of active transport: 1. Cell Membrane Pumps 2. Vesicles
Cell Membrane Pumps a type of active transport
• Unlike the process of facilitated diffusion, in active transport, molecules are “pumped” across the cell membrane by pumps called transport proteins. • This pumping process requires energy.
• Because this process does not depend on diffusion, cells can use this process to bring in needed molecules or remove waste from the cell.
Active Transport Requires Energy (ATP!)
Vesicles a type of active transport
• Another type of active transport happens when molecules are too large to pass through a cell membrane, even with the aid of transport proteins.
• These molecules require the use of vesicles to help them through the membrane. • Endocytosis: large molecule is passing into the cell. • Exocytosis: large molecule is passing out of the cell.
Endocytosis vs. Exocytosis
Now?
• Starch and Iodine Lab • Egg Lab • Notebooks • Starch and Iodine Lab Questions • Active Transport WS
• Concept Map
• Work on Study Guide • Notebooks graded tomorrow • (Vocab, Starch Iodine, Active Transport WS, study guide)
• Quiz tomorrow on Active and Passive Transport