Essay about Cell Membrane Transport - 600 Words

Cell Membrane Transport Hands-On Labs, Inc. Version 42-0034-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor. Exercise 1: Diffusion through an Artificial Membrane Observations†¦show more content†¦It is semi-permiable H. Is the transport mechanism in the model cell passive or active? Why? Passive†¦.because active transport travels ACROSS a cell Exercise 2: Diffusion at different temperatures Observations Data Table 3: Diffusion of KMnO4 at Various Temperatures and Times | Temperature inside cup | Color of Water | | 0 min | 5 min | 40c | Bright Purple | Deeper purple | 5c | Bright Purple | Slightly paler purple | 25c | Bright Purple | Stayed the same | Questions I. How does temperature affect the rate of diffusion? J. State a general hypothesis to cover how temperature affects rate of diffusion The higher the temp the quicker the diffusion Exercise 3: Tonicity and Diffusion Observations Data Table 4: Potato Dimensions. | Potato | Before Osmosis(L Ãâ€" W) cm | After Osmosis(L Ãâ€" W) cm | TonicityHypertonic, Isotonic, orHypotonic | Distilled water | 7cm x 0.5cm | | hypertonic | 10% Sodium Chloride | 7cm x 0.5cm | | hypotonic | Questions A. What is the condition of each potato strip after soaking in the test tubes for an hour? Which one is limp and which one is crisp? #1 (salt amp; distilled water) was crisp #2 (10% sodium choloride was limp B. How would you explain the difference in the conditions of the potato strips using the concept of tonicity? Limp = water has left the potato (hypertonic) rigid= water has entered the potato (hypotonic)Show MoreRelatedThe Cell Membrane Transport Lab846 Words   |  4 PagesIn the cell membrane transport lab, there were many experiments that were done such as osmosis, diffusion in a gel, diffusion in a liquid, diffusion in air, and filtration, A cell membrane transport lab is done to understand the different ways of transport and why they are all important since it relates to the human body. Osmosis occurs when a fluid, that’s most likely water, passes through a semipermeable membrane. The tonicity of the solutions on both sides of the semipermeable membrane determinesRead MoreBiology : Cell Membrane Transport2664 Words   |  11 Pages Cell Membrane Transport Ard Orpilla Zoology 2011 Section 16 Manisha Rao October 6, 2014 â€Æ' Introduction Cells are the basic units of life. Everything alive consists of cells. In order for cells to perform their basic functions, it has to continuously seek homeostasis. This is done by structures within the cell. A structure within the cell is the plasma membrane, which regulates what enters and exits the cell. The cell membrane contains a phospholipid bilayer which causes the cell to have selectiveRead MoreThe Role Of Proteins Of Cell Membrane Transport1276 Words   |  6 PagesDiscuss the role of proteins in cell membrane transport essay plan Cell membranes are surrounded by a phospholipid bilayer that provides a semipermeable barrier for cells, separating the cytosol from the extracellular environment. 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[1] The aim of this experiment was to use beetroot to examine the effectRead MoreWhy Chloride Is Important For The Transport Of Negative Anions Across The Cell Membrane1516 Words   |  7 PagesChloride channels are a structurally diverse superfamily of transmembrane proteins that facilitate the transport of negative anions across the cell membrane. These channels are involved in a plethora of physiological processes such as neurotransmission, excitation of skeletal, cardiac, and smooth muscle, salt transport, cell volume regulation, and acid production in internal and external compartments. Families of these channels include the voltage-gated CLC family, calcium-activated CaCC family,Read MoreWhy Chloride Is Important For The Transport Of Negative Anions Across The Cell Membrane1706 Words   |  7 PagesChloride channels are a structurally diverse superfamily of transmembrane proteins that facilitate the transport of negative anions across the cell membrane. These channels are involved in a plethora of physiological processes such as neurotransmission, excitation of skeletal, cardiac, and smooth muscle, salt transport, cell volume regulation, and acid production in internal and external compartments. Families of these channels include the voltage-gated CLC family, calcium-activated CaCC family,Read MoreEssay about Cell Membranes and Transport1350 Words   |  6 PagesCell Membranes and Transport Hands-On Labs, Inc. Version 42-0033-00-01 Exercise 1: Diffusion Observations Data Table 1: Rate of diffusion in different temperatures | |  ºC | Minutes | Temperature | InitialTemp. | InitialColor | 5 | 10 | 15 | 20 | 25 | 30 | 60 | Cold | 10 °celsius | clear | clear | clear | clear | clear | clear | light purple | light purple | Ambient | 25 °celsiusRead MoreCell Membrane Permeability1319 Words   |  5 Pageslipid-soluble molecules (such as hydrocarbons) can freely pass across the membrane. All ions and large polar molecules (such as glucose) are not permeable to the membrane. Membrane structure The plasma membrane maintains dynamic homeostasis by separating the internal metabolic events of the cell from its external environment and controlling the movement of materials into and out of the cell. The membrane is a double phospholipid membrane, also referred to as a phospholipid bilayer, and has polar hydrophilicRead MoreAnatomy Intorduction to the Human Body Essay1362 Words   |  6 PagesANATOMY PHYSIOLOGY I WORKSHEET I Plasma Membrane and Cellular Transport Structure of the Plasma Membrane 1. Why do you think it is important to have a membrane surrounding each of our trillions of cells? Expect varying answers, but the idea is have the students understand the plasma membrane separates the cells from their environment and each other while also regulating the material within each cell. 2. What are two distinctive physical features of phospholipids? 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