Cells and Their Environment Objectives: 1. Relate concentration gradients, diffusion, and equilibrium. 2.Describe the importance of ion channels in passive.
Section 4-1 1 way cells maintain homeostasis is controlling movement of substances across cell membrane Cells must use energy to transport some substances.
1 Cell-Cell Interactions Chapter 7. 2 Outline Cell Signaling Receptor Proteins – Intracellular Receptors – Cell Surface Receptors Initiating the Intracellular.
Cells and Their Environment Ch. 4 Biology. Membrane Structure Phospholipid Bilayer 2 layers of phospholipids Proteins Transport Receptors Cholesterol.
Active Transport Section 4-2. Some substances are transported against a concentration gradient. Facilitated diffusion moves sugars and amino acids across.
Bell Ringer ____H 2 O ____Na 2+. Cell Membrane Fluid Mosaic Model Cell membrane is thought to be both fluid and a mosaic of phospholipids, proteins and.
