Learning Activity Sheet: Cell Membrane | Gen. Bio1 | DICES

# Diocese of Imus Catholic Educational System, Inc. (DICES) ## Learning Activity Sheet **Name:** **Grade & Section:** **Teacher:** **Subject: Gen. Bio1** **Quarter: 2nd** **Act. No.1** **Date:** ### **Activity Title: Knowing cell membrane!** **Learning Target:** The learners will be able...

# Diocese of Imus Catholic Educational System, Inc. (DICES) ## Learning Activity Sheet **Name:** **Grade & Section:** **Teacher:** **Subject: Gen. Bio1** **Quarter: 2nd** **Act. No.1** **Date:** ### **Activity Title: Knowing cell membrane!** **Learning Target:** The learners will be able to describe the structural components of the cell membrane. **Values/Graduate Attribute:** The learner will become appreciative of life and stewards of God's creations. **References:** General Biology 1/ Maria Cielo Herminia S. Pineda **Pages:** 74-75 ### **I. CONCEPT NOTES:** #### **Cell Membrane** - It is a barrier that separates a cell from its surrounding environment. #### **Fluid Mosaic Model** - It describes the structure of a cell membrane. It indicates that the cell membrane is not solid but is flexible and has a similar consistency to vegetable oil. ### **Components of Cell Membrane:** 1. **Phospholipids** – These form the foundation of a plasma membrane that is made up of modified fat molecules. These consist of a three-carbon glycerol backbone with two fatty acid molecules attached to carbons 1 and 2, and a phosphate-containing group attached to the third carbon. A phospholipid consists of a hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail. 2. **Cholesterol** – It is made up of four fused carbon rings. It can be found in the interior portion of the bilayer and tends to dampen the effects of temperature on the membrane. ### **II. EXERCISE** **Directions:** Draw and label the parts of the Phospholipid bilayer as major components of the cell membrane. Indicate the function of each part. Be creative in illustrating your drawing using coloring materials. # Diocese of Imus Catholic Educational System, Inc. (DICES) ## Learning Activity Sheet **Name:** **Grade & Section:** **Teacher:** **Subject: Gen. Bio1** **Quarter: 2nd** **Act. No.1.2** **Date:** ### **Activity Title: Transport Mechanisms (Active Transport)** **Learning Target:** The learners will be able to explain transport mechanisms in cells (diffusion, osmosis, facilitated transport, active transport) **Values/Graduate Attribute:** The learners will become appreciative of life and stewards of God's creations. **References:** General Biology 1/ Maria Cielo Herminia S. Pineda, pp 76-81; General Biology 1/Gisselle Millete M. Belardo, pp. 90-93 ### **I. CONCEPT NOTES: (Continuation of Day 2)** #### **3. Proteins** - They float within the lipid bilayer. These may extend partway into the plasma membrane, cross the membrane entirely, or be loosely attached to its inside or outside face. * **a. Integral proteins** – These are embedded in the plasma membrane and may span all or part of the membrane. They serve as a channel or pumps to move materials into or out of the cell. * **b. Peripheral proteins** – These are found on the exterior or interior surfaces of membranes, attached either to integral proteins or phospholipid molecules. #### **4. Carbohydrates** – These are always found on the exterior surface of cell and are bound either to proteins (forming glycoproteins) or to lipids (forming glycolipids). ### **II.EXERCISE** **Directions:** Draw and differentiate the two types of Protein # Diocese of Imus Catholic Educational System, Inc. (DICES) ## Learning Activity Sheet **Name:** **Grade & Section:** **Teacher:** **Subject: Gen. Bio1** **Quarter: 2nd** **Act. No. 1.3** **Date:** ### **Activity Title: Relate Me!** **Learning Target:** The learners will be able to relate the structure and composition of the cell membrane to its function. **Values/Graduate Attribute:** The learners will become appreciative of life and steward of God's creations. **References:** General Biology 1/ Maria Cielo Herminia S. Pineda **Page(s): 75-76** ### **I. CONCEPT NOTES** ### **Membrane Structures and Functions** The plasma membrane or cell membrane of a cell carries out several functions: 1. It serves as a barrier and gatekeeper. 2. They are semi-permeable membranes, which means that some molecules can diffuse across the lipid bilayer, but others cannot. 3. It often includes receptor sites for interaction with specific biological chemicals such as certain hormones, neurotransmitters, and immune proteins. 4. It isolates the cell cytoplasm from the external environment. 5. It regulates the exchange of essential substances between the cytoplasm and the external environment. 6. It communicates with other cells. 7. It identifies the cell as belonging to a particular individual member of that species. In multicellular organisms, specific cell types often also have specific labels on their cell surfaces. **Directions:** Complete the table by providing the needed information on the structure and function of the cell membrane. | **COMPONENTS OF CELL MEMBRANE** | **LOCATION** | **FUNCTION** | |---|---|---| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |