Activity 1: Stimulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. The two variables that affect the rate of diffusion are: • The composition of the lipid layer‚ this content varies from tissue to tissue. For example kidney tissues have a high cholesterol content which makes them impermeable to water. • The size of the molecule‚ the larger the molecule the slower the rate of diffusion. 2. Why do you think the urea was not able to diffuse
Premium Diffusion Osmosis Molecular diffusion
Biology Lab Report - Movement in and out of cells (4A) Shiang Chen Ting (24) Sec 313 Introduction The aim of this experiment is to explore the factors which affect the movement of materials in and out of the cells. The dark red or purple colour of Beetroots is caused by a pigment called betalain that is found within the vacuole of the beetroot cells. The pigment remains intact within the cell if the cells are not “stressed” by the external environment. In this exploration‚ two factors that affect
Premium Red Osmosis Diffusion
REVIEW SHEET EXERCISE 1 Cell Transport Mechanisms and Permeability NAME: LAB TIME/DATE: Simple Diffusion 1. The following refer to Activity 1: Simulating Dialysis (Simple Diffusion). Which solute(s) were able to pass through the 20 MWCO membrane? None of the solutes were able to pass through the 20 MWCO membrane. A possible reason to why none of the of these solutes were able to pass through was because the solutes could have been too big to be transported. According to your results
Premium Chemistry Diffusion Osmosis
down its concentration gradient from the air to the blood‚ while at the same time carbon dioxide can diffuse down its concentration gradient from the blood to the air. The sheer number of alveoli inside the lungs means that the surface area for diffusion to take place is huge. In humans‚ carbon dioxide waste is breathed out through the lungs. Ammonia produced from cells is converted to urea as it is much less toxic and is excreted through the kidneys. Fish: Gas exchange is more difficult
Premium Oxygen Respiratory system Carbon dioxide
ACTIVITY ONE- Cell Transport Mechanisms and Permeability: Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. Molecular weight affects the rate of diffusion because the bigger the size of the molecule the longer it will take to diffuse. Membrane size is another variable that affects the rate of diffusion because if the membrane’s pores are small it will take molecules longer to diffuse though it than if the pores were larger. Also‚ membrane thickness
Premium Osmosis Diffusion Molecular diffusion
MODELING LEACHATE MIGRATION FROM A LANDFILL December‚ 2003 1 INTRODUCTION A two-dimensional‚ steady state transport modeling using MODFLOW/CTRAN was carried out following the particle tracking calculations to simulate potential contamination for leachate migration from Gibraltar landfill. Gibraltar landfill was a disposal waste site in Bogotá (Colombia) until 1988. The site presented problems related to contamination for leachate migration after its closure‚ since the operation
Premium Aquifer Anaerobic digestion Hydrology
ACTIVITY 1 Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. __The size and the concentration. ___ 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? __ The molecules were to large to go through. My results matched._ 3. Describe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane. How well did the results compare with your
Free Diffusion Molecular diffusion Osmosis
nutrients throughout their bodies. The distribution of these nutrients must remain constant otherwise the organism will not be able to function at full capacity‚ which may lead to its death. It is for this reason that osmosis and other forms of diffusion are of prime importance to all living organisms‚ because they influence the distribution of nutrients throughout the
Premium Osmosis Cell wall Semipermeable membrane
6 2. MOLECULAR DIFFUSION 7–73 2.1 Concentration‚ Velocity and Flux 8 2.2 Fick’s Law 11 2.3 Steady State Molecular Diffusion through a Constant Area in a Binary Gas Mixture 14 2.4 Multicomponent Diffusion 30 2.5 Gas-Phase Diffusion Coefficient: Measurement and Prediction 36 2.6 Molecular Diffusion in Liquids 42 2.7 Diffusion through a Variable Area 48 2.8 Knudsen Diffusion‚ Surface Diffusion and Self-Diffusion 57 2.9 Applications of the Principles of Molecular Diffusion 59 Notations 59
Premium Chemical engineering Diffusion Separation process
& exocytosisDiffusion‚ facilitated diffusion‚ and osmosis. Types of Particles Transported proteins‚ ions‚ large cells‚ complex sugars. Anything soluble (meaning able to dissolve) in lipids‚ small monosaccharides‚ water‚ oxygen‚ carbon dioxide‚ sex hormones‚ etc. Examples phagocytosis‚ pinocytosis‚ sodium/potassium pump‚ secretion of a substance into the bloodstream (process is opposite of phagocytosis & pinocytosis) diffusion‚ osmosis‚ and facilitated diffusion. Importance In eukaryotic
Premium Diffusion Chemistry Protein