Fluid mosaic Study guides, Class notes & Summaries

why do specimens need to be thin when observing them under a light microscope? - to allow light to pass through identify and explain the starch test - add iodine dissolved in potassium iodide solution to the sample - positive test = blue-black - negative test = orange-brown why is the structure of the plasma membrane often referred to as the fluid mosaic model? - - the continuous bilayer is 'fluid' as the phospholipid molecules are constantly moving - protein molecules are scattered thr...

what is oviparity? correct answers eggs are laid, with little or no embryonic development in the mother with either internal/external fertilisation - found in invertebrates, fish amphibians, reptiles, birts and monotreme animals what is ovoviviparity? correct answers eggs retained in mother's body until ready to hatch, with internal fertilisation and young are born lice - no placental connection to mother - found in invertebrates, fish, amphibians and reptiles what is viviparity? corre...

PATHOPHYSIOLOGY 8TH EDITION MCCANCE TEST BANK NURSINGTB.COM The lysosomal membrane acts as a protective shield between the powerful digestive enzymes within the lysosome and the cytoplasm, preventing their leakage into the cytoplasmic matrix. Disruption of the membrane by various treatments or cellular injury leads to a release of the lysosomal enzymes, which can then react with their specific substrates, causing cellular self-digestion. The other options do not correctly describe this pr...

BIOL1P91 Final Exam Prep test Questions With Verified Answers What are the 4 functions of the cell membrane 1. seperating internal and external environment 2. regulating traffic in the cell 3. Holding contents of the cell in place 4. creates interface for cellular activity What is the structure of the cell membrane - phospholipid bilayer - integral and peripheral membrane proteins - carbohydrate bonded to proteins - fluid mosaic model - asymmetrical leaflets fluid mosaic model of...

NWHSU HISTOLOGY 1 - EXAM 1 2024 WITH 100% CORRECT ANSWERS What is the term for a storage of charge across a membrane - correct answer capacitance what is the difference of charge on the inside of a membrane - correct answer -70mv what are 5 characteristics of a bilipid layer - correct answer 1. thin membrane 2. semipereability 3. allows protein to float around (fluid mosaic) 4. membrane proteins control what comes in, and goes out of the cell 5. gycocalyx what is the function of ...

why are membranes called phospholipid bilayers? - phospholipids have hydrophilic head and hydrophobic tail, hydrophobic face inside of cell making 2 layers what is meant by fluid mosaic? - Mosaic of proteins drifting laterally in fluid bilayer of phospholipids how are membranes adjusted for different temperatures? - membrane fluidity adjusted by changing the ratio of unsaturated to saturated fatty acids how do the relative amounts of saturated and unsaturated fats change? - if you are in a...

BIOL 133 Exam 1- Chapters 1-6 Part 1 of 1 - 1. Molecules move from a high to low concentration in 2. What is the pathway in which a protein moves through the endomembrane system? 3. The cell theory states 4. If two solutions are different, the one will the higher concentration of solutes is 5. What biological macromolecule provides the initial instructions for the primary sequence of proteins? 6. When the solute concentration in solution 1 is lower than the solute concentration in sol...

CELL PLASMA MEMBRANES QUESTIONS 2024 fluid mosaic ANSWER = The cell membrane is dynamic and states that the phospholipid bilayer behaves like a fluid more than it behaves like a solid. In result of it moving laterally within the bilayer, the pattern, or mosaic, of lipids and proteins in the cell membrane constantly changes. Amphipathic ANSWER = A molecule, especially a protein that has both a hydrophilic region and a hydrophobic region. phospholipid bilayer ANSWER = Plasma membrane la...

Name three factors responsible for membrane formation correct answer: Decrease in ionic interactions with water Decrease in membrane entropy Non-covalent interactions between lipids and proteins What membrane structures allow the cell membrane to modulate cell-cell recognition? correct answer: Glycoproteins and glycoplipids What non-covalent forces drive spontaneous membrane assembly? correct answer: Hydrophobic effect, hydrogen bonds and van der Waals What is the most important re...

Chapter 1: Cellular Biology MULTIPLE CHOICE 1. Which statement best describes the cellular function of metabolic absorption? a. Cells can produce proteins. b. Cells can secrete digestive enzymes. c. Cells can take in and use nutrients. d. Cells can synthesize fats. - ANS: C In metabolic absorption, all cells take in and use nutrients and other substances from their surroundings. The remaining options are not inclusive in their descriptions of cellular metabolic absorption. PTS: 1 RE...