Cell membrane carbohydrates participate in... Attaching the membrane to the cytoskeleton Cell-to-cell communication Cell adhesion Transporting substances across membranes
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- In the fluid mosaic model: plasma membrane proteins orient their hydrophilic sides toward the internal bilayer. phospholipids often flip-flop between the inner and outer layers. the mosaic refers to proteins attached to the underlying cytoskeleton. the fluid refers to the phospholipid bilayer. the mosaic refers to the symmetry of the internal membrane proteins and sterols.Secretory vesicles fuse with the cell membrane to release their contents to the outside of the cell. In this process, the membrane of the secretory vesicle becomes part of the cell membrane because small pieces of the membrane are continually added to the cell membrane, one would expect the cell membrane to become larger and larger as secretion continues. The cell membrane stays the same size, however. Explain how this happens.. what are two structural characteristics of cell membrane determine whether substances can pass through them passively? What determines whether or not a substance can be actively transported through the membrane?
- State the functions and importance of each of the following cell membrane components. 1. Phospholipid 2. Sphingolipid 3. Glycoprotein 4. Glycolipid 5. Peripheral Protein 6. Integral Protein 7. Cholesterol 8. Cytoskeleton FilamentsDescribe the permeability of cell membranes. How to substances cross cell membranes? Utilize the terms bi-polar, semi-permeable, diffusion, active transport, membrane proteins, endocytosis, exocytosis, vesicles, phagocytosis, pinocytosis, etc. (This should be 3-4 paragraphs long)To describe: The ways by which membrane proteins associate with the lipid bilayer.
- the structure of the plasma membrane is best described as: two layers of phospholipids stacked on top of each other, with proteins embedded in the phospholipids Oa single layer of proteins and polysachharides mixed together two layers of proteins stacked on top of each other O many sheets of peptidoglycan stacked on top of each other O one layer of triglycerides on top of a layer of proteinsIntermediate filaments (IFs) function to provide mechanical strength to the cell and for internal organization of the cells. The intermediate filament _______________ plays a key role in connecting epithelial cells to the extracellular matrix. The IF binding protein________ plays key role in connecting the IFs in the nucleus with the cytoskeleton in the cytoplasm to help position the nucleus. keratin, SUN-domain protein SUN-domain proteins, lamin lamin, keratin SUN-domain proteins, keratin lamin, SUN-domain protein keratin, laminWhich of the following statements related to intercellular junctions is false? Cadherins are important cell-cell adhesion proteins. A cadherin-mediated junction involves many cadherin molecules to achieve strong adhesion. The cytoplasmic domain of cadherins interacts with actin or intermediate filament cytoskeleton through adaptor proteins. Because tight junctions seal the membrane of adjacent epithelial cells, transmembrane proteins in the apical portion of the plasma membrane cannot move to the basal lateral domain or vice versa. Proteins can diffuse through an open gap junction.
- Match the cell structure with its function Golgi apparatus Lysosome Centriole Peroxisome Nucleolus Smooth endoplasmic reticulum Mitochondria Rough endoplasmic reticulum Ribosomes 1. 2. 3. 4. 5. 6. 7. contain an inner membrane and an outer membrane and are responsible for creating ATP 9. structures composed of RNA, assemble amino acids to make proteins, can be free floating or attached to endoplasmic reticulum refines molecules and surrounds them in a membrane bound vesicle to be transported synthesizes lipids such as steroid hormones made from cholesterol (and has other functions such as detoxification of harmful products in the liver, and stores calcium in muscle cells) with ribosomes, this organelle is involved in protein synthesis produced by the Golgi apparatus, destroy toxic waste products and detoxifies the cell from various substances such as alcohol vesicles that contain powerful enzymes that break down bacteria and other large objects such as cellular debris and old or worn…Secretory vesicles containing insulin move to the plasma membrane at the cell surface and release the protein to neighboring blood capillaries. Which Cytoskeletal element is essential for this vesicle movement within a cell? Lamins Intermediate filaments Microtubules MicrofilamentsPART B: Vesicular Transport D plasma membrane nuclear envelope C ENDOCYTOSIS endoplasmic reticulum transport vesicles EXOCYTOSIS A В CYTOSOL Golgi apparatus Q-6. Choose from the following terms to label A, B, C, & D. EXTRACELLULAR SPACE [Not all of the terms are used] cis-Golgi, early endosome, late endosome, lysosome, medial cisterna, peroxisome, trans Golgi A: B: C: D:
