than itself‚ the potato chips lost weight. As there was a higher concentration of water molecules inside the potato chip compared to the concentration of water molecules outside the potato chip. It was stated in my prediction that osmosis is the diffusion of water molecules from a high to a low concentration‚ therefore water molecules from inside the potato chip moved out into the solution. Leading to the cytoplasm inside the cells to shrink and become flaccid. As the cells of the potato chip have
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Lab Report Pre-lab Quiz Results You scored 50% by answering 2 out of 4 questions correctly. 1. Which of the following is true of osmosis? Your answer : b. Movement is against the concentration gradient of water. Correct answer: c. It is a type of diffusion. 2. Which of the following occurs when a hypertonic solution is added to cells? You correctly answered: d. The cells shrink. 3. The variable that affects osmotic pressure is Your answer : b. the concentration of diffusing solutes. Correct answer:
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source in its functions. Without ATP or energy the Active transport process would not work. It needs this energy because it is pumping substances inside of the cell against the concentration gradient. This process disrupts the equilibrium caused by diffusion. Active transport is
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Surface area / Volume ratio Experiment Introduction: The surface area to volume ratio in living organisms is very important. Nutrients and oxygen need to diffuse through the cell membrane and into the cells. Most cells are no longer than 1mm in diameter because small cells enable nutrients and oxygen to diffuse into the cell quickly and allow waste to diffuse out of the cell quickly. If the cells were any bigger than this then it would take too long for the nutrients and oxygen to diffuse into
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Investigating the Water Potential Of Potato Cells Aims 1. To test how water potential‚ in a solution‚ affects the movement of water in and out of a cell by osmosis Prediction I predict that by increasing the water potential around the outside of the potato cell‚ (i.e. so that the water potential is greater outside the cell compared to the inside of the cell e.g. 0m sucrose) that the net movement of water into the cell will increase. This is due to the water potential being greater outside the cell
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Review Sheet Results 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. Your answer: Because outside a typical cell‚ the concentration of K+ is about 5mM and the concentration of Na+ is about 150 mM. When you increase the concentration of K+ from 5 to 25 mM and reduce concentration of Na+ from 150 to 130 mM‚ the outside has more concentration of K+. The membrane is permeable to a particular ion‚ that ion will diffuse down
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involves rat blood in various solutions. I needed to understand certain terms before preforming this lab to be able to efficiently explain what is happening to the cells. Diffusion is the tendency of a substance to move down its concentration gradient from a more concentrated to a less concentrated area. Facilitated diffusion is the spontaneous passage of molecules and ions bound to a specific carrier protein across a biological membrane down their concentration gradient. Active transport is the
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Transport Mechanisms and Permeability: Activity 2: Simulated Facilitated Diffusion Lab Report Pre-lab Quiz Results You scored 50% by answering 2 out of 4 questions correctly. 1. Molecules need a carrier protein to help them move across a membrane because Your answer : a. they are not lipid soluble. Correct answer: d. they are lipid insoluble or they are too large. 2. Which of the following is true of facilitated diffusion? You correctly answered: c. Movement is passive and down a concentration
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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
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membrane: cholesterol‚ glycoprotein‚ phospholipids‚ membrane protein‚ and glycolipid. A.lycoprotein B.Glycolipid C.Membrane protein D.holesterol E.Phospholipid Dr. D. Houston Community College Page 1 Cellular Transport: Diffusion and Osmosis 1. Define cellular homeostasis. How does the plasma membrane contribute to cellular homeostasis? Cellular homeostasis is the
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