------------------------------------------------- Water and Electrolytes Water constitutes 50-55% of a woman’s body weight and 55-60% of man’s weight. Water gives structure and form to the body‚ helps maintain body temperature‚ and also creates the necessary environment for cell metabolism. There are two compartments of body water‚ extracellular and intracellular fluid. Extracellular fluid (ECF) is water found outside of cells. Making up approximately 20% of total body weight‚ the ECF consists
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Membrane Functions: Aim: To demonstrate the process of osmosis using a chicken’s egg Hypothesis: I predict that the egg’s mass after 10 min. in the 5% salt solution would increase due to and balancing out the solution. In the 10% salt solution‚ the egg’s mass would decrease since there is a high amount of salt. In the dilute water solution‚ the egg’s mass will increase‚ as the membrane would take in that water. Materials: 1- One fresh egg 2- One plastic spoon 3- One plastic fork
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onion skin after flooding it with salt solution? What could be a possible explanation to such observation? o Crenation happens (where the cytoplasmic contents of the cell pull away from the rigid cell wall) because the onion skin is exposed to a hypertonic solution (where the water solution on the cell is greater than that of the outside) and by osmosis‚ the water goes out of the cell‚ this process is called Plasmolysis. 2. What happened to
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Element: Simplest form of matter to have unique chemical properties. Atom: The smallest particles with unique chemical identities. Nucleus: Center of an atom (composed of protons and neutrons). Proton: Have a single positive charge (+1). Neutron: Have no charge. Electron: Tiny particles with a single negative charge and very low mass (-1)/determines chemical bonding properties of an atom. Atomic Number: Number of protons in the nucleus. Atomic Mass: Approximate number of protons and neutrons
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BIO FINAL STUDY GUIDE Scientific Method: 1) Observe something interesting 2) Educated idea = hypothesis (if – change/IV -… then – measure/DV… because) 3) Experiments 4) Analyze + conclude 5) Report it to world Science | Pseudoscience | -uses scientific method | -doesn’t use scientific method | -good hypothesis (falsifiable –provable) | -bad hypothesis (unfalsifiable) | -Repeatable + predictable | -unrepeatable | -1 variable | -none or many variables | -ex. Aliens
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General Anatomy and Physiology Case Studies - Osmosis These two Case Studies come from a National Center on Case Studies. I think that a case study approach is very useful in applying knowledge and this is what makes you learn it better. They may be a little daunting when you read them but I will help you go through them. Please ask for help so this topic becomes more enjoyable for you. Part I—Too Much of a Good Thing Times were difficult in Habersham County. The skyrocketing prices of fuel and
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Osmotic Pressure i. Amount of pressure required to stop osmotic flow of water 1. Determined by concentration of solutes in solution 2. Measured in milliosmoles f. Osmotic movement of fluids i. Types of solutions 1. Isotonic (osmolality is the same) 2. Hypotonic (hyperosmolar) - less concentrated (less particles)‚ more dilute (lower
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Title: Colligative Properties & Osmotic Pressure Background: Important terms to study from this lab assignment are colligative properties‚ membrane permeability and osmotic pressure. First‚ colligative properties are “those of a solution that depend solely on the number of solute particles present‚ not the identity of those solute particles. These properties include: vapor pressure lowering‚ boiling point elevation‚ freezing point depression‚ and osmotic pressure” (p. 17 lab manual). In this experiment
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Egg Lab Write Up The purpose of this lab was to depicked the many properties of diffusion such as isotonic‚ hypotnonic‚ and hypertonic‚ so that students could have a clear visual example to go by for future refrences. We also did this to learn about selective permeability and osmosis. Our original hypothesis stated that the vinegar would react with the calcium in the shell to create CO2 bubbles. Note I said the original hypothesis as this experiment took coarse over a four day period‚ in which
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Meghann Kiphart AP Biology Lab Report Number One Mrs. Irvine Introduction: Because all molecules have kinetic energy and are constantly in motion cells go through a process called diffusion. Diffusion is the movement if molecules from an area of higher concentration to and area of lower concentration. This process with continue to occur until an equilibrium is reached. Osmosis is a different and unique kind of diffusion. Osmosis is the diffusion of
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