paper on the Importance of Ca ions

pre-LAB 5 Diffusion/Osmosis and Protocol A. Assign the terms below to the simplistic scenario: you put sugar (or coffee) in the water to make sweet water (or coffee drink). Solution • Solute • Solvent. B. Look up and define terms in your words - o hypotonic o hypertonic o isotonic. Protocol: BIO 101 Lab 5 Osmosis and Diffusion.pdf Search entries or author Unread G Reply El

You are stranded on a lifeboat with several other people in the middle of the ocean.  You have run out of clean drinking water and are very thirsty.  The others have started to drink the seawater to quench their thirst. Since you’re waiting for rescue (and are a top notch AP Biology student), you decide to solve a couple of water potential problems to determine if drinking sea water is a good idea or not.  a) The majority of dissolved ions in seawater is NaCl, roughly a 0.5M concentration.  The ionization constant of NaCl is 2.0.  Calculate the solute potential for seawater if you know that the water is 2°C. b) Your own cells have a 0.15M concentration.  Calculate the solute potential for your own cells, knowing that body temperature is 37°C. c) Using your knowledge about water potential, if you drink the seawater, wat will happen when the seawater comes into contact with your body’s cells? Note: ΨP for animal cells is zero

5. Note: These directions will help you collect data that will answer questions about different concentrations of a single chemical. If you have a different question, you will need to modify your data table, the data collected, and graph.   1. Identify at least 4 different concentrations of the chemical for which you wish to collect data. Type the name of your chemical at the top of the first column and record the concentrations in your data table.   2. For each concentration you will collect heart rate data for three different daphnia. a. Select a daphnia trial you wish to observe. b. Select a video speed at which you wish to count the heart beats of the daphnia. c. Count the heart beats in your selected video. d. Remember all of the videos show 15 seconds. Multiply your 15 second count by 4 to then have beats per minute for the units of heart rate. Record your heart rate calculation (bpm) in the table. e. The table is set-up to automatically calculate the average heart rate for…

Part A What type of bond is involved in the formation of a water molecule? 00 polar covalent bonds Opeptide bonds double covalent bonds Oionic bonds Submit Provide Feedback Request Answer

1. A peer-reviewed scientific journal articles. is usually based on either past experiences or information gained from reading 2. variables are kept the same to maintain consistent testing conditions across all experimental samples. 3. provides a quick, albeit inaccurate, means of obtaining the pH of a solution. 4. Substances whose pH values are above 7.00 are considered ; substances whose pH values are below 7.00 are considered 5. During a reaction, molecule B receives an electron(s) from molecule A, leaving molecule A oxidized. 6. The reagent is used to detect the presence of complex sugars (ex. starch) in solutions. 7. Reducing sugars, such as glucose, will always react with Benedict's reagent because these sugars have a(n) functional group. 8. are molecules which donate protons (H+) in solution very easily.

Part 1: In the image below (Figure 2) which way will water go?  Describe why in 1-2 sentences using the vocabulary of this lab. a) On a sheet of paper, sketch Figure 5 given above. Draw stars to represent the relative amounts of proteins on side A and side B of Figure 5 that result in water moving to the right, as shown by the arrow. Label Figure 5 with the following terms: “hypertonic”, “more solutes”, “less water”, “hypotonic”, “fewer solutes”, “more water”, semipermeable membrane.”  Part 2: Do you think any water molecules move in the opposite direction of the arrow?  Explain your answer in detail. a)  Describe in your own words why chloroplasts and mitochondria found within a photosynthetic, eukaryotic cell have two membranes.

Select all that apply: Hydrogen peroxide and other gases affect the structure of O Proteins O DNA Cell membranes O Cell walls