Lesson 1.11 Transport of Molecules Across Cell Membranes (1).pdf

WORK PLAN Discussion Checking Cell Opening Recitation Skill Activity Closing 5’s of...

WORK PLAN Discussion Checking Cell Opening Recitation Skill Activity Closing 5’s of Motivation Structures Prayer of PVM Building Time Prayer Attendance & Functions RECITATION of PVM, 8 Core Values, EOMS & QPS  E L C L T O S A T R N P R 1 CELL TRANSPORT 2 3 o the process by which substances move into, out of, or within a cell. This movement is crucial for various cellular functions, including nutrient uptake, waste removal, and maintaining intracellular homeostasis. SKILL BUILDING UNIVERSITY OF PERPETUAL HELP SYSTEM DALTA - MOLINO SENIOR HIGH SCHOOL SCIENCE DEPARTMENT 12155 BIO1 – GENERAL BIOLOGY 1 LESSON 1.11 Transport of Molecules Across the Cell Membrane Mr. Rey B. Argoso, LPT SHS Science Faculty  LEARNING OBJECTIVES At the end of the discussion, students should be able to: 1 2 3 explain various transport characterized the relate the structure and mechanisms on how substances structural components of composition of the cell cross the cell membrane. the cell membrane, membrane to its function  Transport of Molecules Across the Cell Membrane CELL MEMBRANE All cells are surrounded by a cell membrane (also called the plasma membrane). Cellular membranes are fluid mosaics of lipids and proteins. It is consist of a double layer of lipids (bilayer) in which proteins are located. Cell membranes are asymmetric. CELL MEMBRANE The cell membrane keeps the components of the cell isolated from the external environment The cell membrane is involved in regulating the flow of materials into and out of the cell, mediating intercellular communication and adhesion and a multitude of other functions  Cell Membrane: Phospholipids ✓ The most abundant lipids in most membranes are phospholipids. ✓ A phospholipid is an amphipathic molecule. Cell Membrane: Cholesterol Cholesterol, a type of steroid, is a crucial molecule in animals. It is a common component of animal cell membranes. Cholesterol maintains the fluidity of the cell membrane. When the temperature becomes lower it helps to increase the fluidity of the cell. When the temperature becomes higher it helps to decrease the fluidity of the cell. Cell Membrane: Proteins 1. Receptor 2. Enzymes 3. Channel 4. Volted-Gated Channel 5. Electron Carrier 6. Carrier-Protein Pump 7. Cell to Cell Recognition 8. Cell Adhesion 9. Anchor Protein CELL AND ITS ENVIRONMENT  TRANSPORT OFMOLECULES ACROSS CELL MEMBRANEAS There are 3 important characteristics of molecules that affect their ability to cross the cell membrane: Size(Macromolecule or micromolecule) Charge(Polar or nonpolar) Solubility (Lipid-soluble or Not lipid soluble)  CELLSpiring Quote of the Day "The cell membrane is the gatekeeper of life’s wisdom— teaching us that true strength comes from knowing what to embrace and what to guard against. Like the cell, we thrive when we let in the energy that fuels us, release what no longer serves us, and stand firm in our boundaries. In every molecule that crosses its threshold, the cell teaches us the power of mindful openness and the beauty of resilience." -Anonymous GOD BLESS! I hope you learn something new today! ☺