Movement Through the Membrane Mr. Luis A. Velázquez Biology.

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Presentation transcript:

Movement Through the Membrane Mr. Luis A. Velázquez Biology

Cell Membrane The cell membrane is also known as: – Phospholipids bi-layer – Plasma membrane – Fluid mosaic membrane

Diffusion Diffusion Motion of particle for high concentration To low concentration. This causes many substances to move across a cell membrane and not require ATP energy.

Osmosis is a type of diffusion. The movement of water across a semi permeable membrane. What is Osmosis?

Passive Transport When material move from areas of high concentration to low concentration they don’t requires energy. – Examples Diffusion Facilitate Diffusion Carrier Protein Osmosis Particles Water

Active Transport When material move from areas of low concentration to high concentration they requires energy. – Examples Endocytosis Exocytosis

Endocytosis

Exocytosis

Types of Endocytosis Phagocytosis Pinocytosis

Phagocytosis

Pinocytosis

What can diffuse through? Small & nonpolar molecules can diffuse through the cell membrane CO 2 O 2

Plasma Membrane Hydrophobic- Nonpolar Lipids Hydrophilic - Polar Phosphate Water is what type of molecule? Polar or nonpolar?

Interactive Review online