Wednesday, December 18, 2019

Essay about Cell Membranes and Transport - 1350 Words

Cell 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 °celsius | clear | clear | clear | clear | light purple | light purple | med purple | med purple | Hot | 75 °celsius | clear | purple | purple | purple | purple | dark purple | dark purple | dark purple | Questions A. Write a one-paragraph†¦show more content†¦Identify which of the solutions were isotonic, hypertonic, and hypotonic in relation to the potato. - The potatoes in the distilled water and 0.2 sucrose were the most rigid and did not change in mass. These solutions could be said to be isotonic. The potatoes in 0.8 and 0.6 could se said to be less turgid and was placed in a hypertonic solution. B. What would happen to a red blood cell placed in distilled water? Why? - If a RBC were placed in distilled water, which is a hypotonic solution, it would explode. This is because water would rush into the cell causing it to swell and thus cause it to explode. C. Create a graph of your experimental data by plotting the percent change in potato mass against sucrose molarity. Label the x-axis as â€Å"Molarity of Sucrose,† and the y-axis as â€Å"% Change in Mass.† D. Determine the molar concentration of the sucrose contained in the potato strips by using the graph created in Question C. At the point where the molar concentration of the sucrose in the potato would be isotonic to the sucrose, there would be no net change in the potato mass. On the graph this is located at the 0% change. Draw a line from this place on the y-axis to intersect the line. From the line draw a line down to the x-axis to find the molarity. Molar concentration of sucrose in potato = 0.8 M Exercise 3: The Effect of Solvents on Membrane System Observations Data Table 3: ColorShow MoreRelatedBiology : 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 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 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. Phospholipids are ampithatic, meaning that they have a hydrophilic head and hydrophobic tail, which causes the heads to face outwards towards the water and the tails inwards, creating the bilayer [figure 1]. Small hydrophobic molecules such as O2 and CO2 and small unchargedRead MoreEssay about Cell Membrane Transport600 Words   |  3 PagesCell 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 thisRead MoreCell Membranes and Transport Essay examples1103 Words   |  5 PagesCell Membranes and Transport Introduction: Beetroot cells contain a red pigment, called betalains, which is stored in the vacuole of the plant cells. This is to prevent the pigment leaking out of the cell. [3] The outer layer of the cell is also surrounded by a membrane, this also helps the pigment stay inside the cell. Normally the pigments cannot pass through the membranes but they leak out when the beetroot is cooked. [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 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 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 MoreCells Make Up Every Living Thing1695 Words   |  7 PagesCells make up every living thing. They are mandatory to life and its functions.   The cell allows us to do our functions, while doing its own (Cobb, ed., 2009).   Inside cells, there are organelles that carry out functi ons for the cell to live.   They have many different kinds of organelles, such as the golgi body, endoplasmic reticulum, and the nucleus (Cellular Transport, 2009).   They all have different jobs to allow the cell to function, but the cell membrane   has a job that that is done in variousRead 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 MoreMembranes and Their Functions Essay1270 Words   |  6 PagesMembranes and Their Functions Membranes form boundaries both around the cell (the plasma membrane) and around distinct sub cellular compartments (e.g. nucleus, mitochondria, lysosomes, etc.). They act as selectively permeable barriers allowing the inside environment of the cell or the organelle to differ from that outside. Membranes are involved in signaling processes; they contain specified receptors for external stimuli and are involved in both chemical and electrical

No comments:

Post a Comment

Note: Only a member of this blog may post a comment.