BIO 244 - Final Review

BIO 244 - Final Review - Lab #1 Acids, Bases, and Buffers...

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Lab #1 – Acids, Bases, and Buffers 1) What is homeostasis? Give an example of homeostasis in the body. 2) What is the pH scale? 3) Why must blood pH be kept within a range of 7.35 to 7.45? 4) What does a buffer do? 5) If a solution has more H+ ions, is it an acid, a base, or neutral? 6) Why does CO 2 build up when you exercise? Describe how glucose is utilized. 7) How does the body get rid of excess CO 2 ? 8) What is the difference between a strong acid and a weak acid? Lab #2 – Diffusion and Osmosis 1) Define diffusion. 2) Define osmosis. 3) What does MWCO stand for and what does it mean? 4) What does Benedict’s solution test for? 5) If glucose and starch are inside a dialysis tube with a MWCO of 10 and placed into water, which will diffuse out of the bag? What about a MWCO of 100? 1,000,000?
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6) Which molecules diffused through the dialysis tubing during the experiment? Why? 7) Which molecules remained in the dialysis tubing during the experiment? Why? 8) Why did the weight of the bag increase the longer it stayed immersed in water? 9) Describe the process of dialysis as it is used in practice for numerous people all over the world. 10) I have a solution of Na+ ions and K+ ions in a beaker. I want to get the Na+ ions out of the solution and into a new one, leaving all the K+ ions in the original solution. How could I accomplish this? Lab #3 – The Nerve Impulse 1) What is a myotactic reflex? 2) What is the resting membrane potential of a neuron? 3) Describe the three phases of an action potential.
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This note was uploaded on 06/21/2008 for the course BIO 244 taught by Professor Van sciver during the Fall '06 term at Rhode Island.

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BIO 244 - Final Review - Lab #1 Acids, Bases, and Buffers...

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