In Crash Course video number four you learn animal cells and how they operate more like a city. Hank calls this city Eukaryopolis- The city of animal cells. He also goes over what each part of the cell and how the animal cells are responsible for different things that happen in our body. The very start of video starts off comical by showing you the difference between what an animal is and is not. Then it goes on to explain that why a eukaryotic because they have a “true kernel‚ meaning good nucleus
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the glycocalyx of a cell that is becoming cancerous. In fact‚ a cancer cell’s glycocalyx may change almost continuously‚ allowing it to keep ahead of immune system recognition mechanisms and avoid destruction. (Cancer is discussed on pp. 145-146) 3.2 Selective permeability is a characteristics of healthy‚ intact cells. When a cell (or its plasma membrane) is severely damaged‚ the membrane becomes permeable to virtually everything‚ and substances flow into and out of the cell freely. This phenomenon
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Glucose in Yeast Cells Glucose is absorbed across the cell surface membrane (plasma membrane) of most cells. A convenient way to investigate this is to use a solution of glucose and a suspension of yeast cells. The amount of glucose taken up from the glucose solution by yeast cells in a fixed length of time can be measured. At the end of the fixed length of time‚ further uptake of glucose is prevented by transferring the yeast suspension to a boiling water bath to kill the yeast cells. If the suspension
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water intake than in a normal‚ healthy adult under age 40? 3. Why does potassium concentration rise in patients with acidosis? What is this called? What effects does it have? 4. Saline solution is used to reverse hypotonic hydration. Are body cell membranes permeable to saline? Explain your response. 5. Explain the renin-angiotensin mechanism. 6. Explain how ADH compensates for blood that contains too many solutes. Answers 1. Three types of homeostasis are involved: fluid balance‚ electrolyte
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Prokaryotic and Eukaryotic Cells‚ Distinguish Among Plant‚ Animal‚ and Protist Cells‚ and Identifying the Organelles that are Evident in Them Introduction There are two different types of cells‚ prokaryotes and eukaryotes. Prokaryotes‚ such as bacteria‚ lack a nuclear membrane and other membrane bound organelles. Their genetic material consists of a single molecule of singular DNA. Eukaryotes‚ such as plant and animal cells‚ have a nuclear membrane and other membrane bound organelles. Their genetic
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The cell is the basic functioning unit of organisms in which chemical reactions take place. These reactions involve an energy release needed to support life and build structures. The cell consists of membrane bound organelles‚ which are responsible for the division of labour. There are two main classes of cells- Prokaryotes which are cells without a nucleus‚ where the DNA is spread around the cytoplasm of the cell‚ an example of a prokaryote is a bacterium (See Figure 1). The other class is the Eukaryotes
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What is the function of each component of the model? What determines the flexibility of the cell membrane? 14. What are the types of transport across the cell membrane? Which uses proteins? Which needs energy? 15. For end product feedback‚ the product stops enzyme activity. Explain the two ways enzymes are inhibited by product. 16. What is the resting membrane potential range of cells 17. Describe the model that describes how an enzyme fits a substrate. Which is the “key” and
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why increasing extracellular K+ causes the membrane potential to change to a less negative value. How well did the results compare with your prediction? Your answer: If extracellular K+ is increased then the intracellular K+ will decrease. Fewer intracellular K+ ions would result in the membrane potential being less negative. This is what I predicted to happen. 3. Explain why a change in extracellular Na+ did not significantly alter the membrane potential in the resting neuron? Your answer:
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02.02 Early Cells 1. How are cells affected by the movement of water? Cells are affected by the water through diffusion. You see if you when you apply or remove water from the cell it will most likely show you how it functions. For example when you have the egg and you apply a bit of water it will most likely shrink if you add a lot of water it’s mostly likely that the egg will burst. Hypothesis (What do you think will happen to the egg after the three days? Be sure to give a reason for
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under a membrane so it is not under pressure. The Water Potential (Ψ) of the solution is equal to the Ψ of the tuber as there is no pressure potential. C2 and C3 As the concentration of the sucrose solution increases‚ the average percentage change in mass decreases in the potato tubers and this is the same as in the carrot tubers. At low concentrations of sucrose solutions (0.1 M) the mass of the carrot and potato tubers increases due to water moving into the protoplast of the cell from the
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