1 a) suggest an experiment/procedure you could use to find the concentration of NaCl within a...
1 a) suggest an experiment/procedure you could use to find the concentration of NaCl within a single cell(use a potato cell as your example)
b)based on what you know about diffusion, osmosis, and dialysis, what do you think a kidney dialysis machine is doing for a patient?
c) what could you do to increase the rate at which sugar dissolves in water so that you can make sweet tea?
Homework Answers
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1 a) suggest an experiment/procedure you could use to find the
concentration of NaCl within a...
How Do Kidneys Work? The functional unit of the mammalian kidney is called a nephron and...
How Do Kidneys Work? The functional unit of the mammalian kidney is called a nephron and it is similar to a piece of dialysis tubing. The nephron's chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood. reabsorbing what is needed, and excreting the rest as urine. Quantities of blood plasma that contain dilute amounts of urea are filtered into the nephron. Moving water from the inside of the nephron to...
Osmosis 5. Did water flow into or out of the plant cells (potato cells) in each of the samples examined? How do...
Osmosis 5. Did water flow into or out of the plant cells (potato cells) in each of the samples examined? How do you know this? 6. Would this experiment work with other plant cells? What about with animal cells? Why or why not? 7. From what you know of tonicity, what can you say about the plant cells and the solutions in the test tubes? What do your results show about the concentration of the cytoplasm in the potato cells...
Osmosis 5. Did water flow into or out of the plant cells (potato cells) in each...
Osmosis 5. Did water flow into or out of the plant cells (potato cells) in each of the samples examined? How do you know this? 6. Would this experiment work with other plant cells? What about with animal cells? Why or why not? 7. From what you know of tonicity, what can you say about the plant cells and the solutions in the test tubes? What do your results show about the concentration of the cytoplasm in the potato cells...
POST-LAB QUESTIONS / HOMEWORK 1. A student performed the following osmosis experiment, similar to the one...
POST-LAB QUESTIONS / HOMEWORK 1. A student performed the following osmosis experiment, similar to the one you did, using a different combination of substances. Determine his/her results and explain them by answering the questions in the table by filling in the blank boxes. Assume that the dialysis bag is impermeable to sucrose. Set-up 1 Set-up 2 Set-up 3 Set-up 4 Set-up 5 Bags 15 mL in each Tap water Tap water 55% sucrose 21% sucrose solution solution Tap water Beakers...
CRITICAL THINKING QUESTIONS 1. A pre-weighed dialysis bag which contained a solution of 10% glucose was...
CRITICAL THINKING QUESTIONS 1. A pre-weighed dialysis bag which contained a solution of 10% glucose was placed in a beaker containing a solution of 20% glucose. After one hour, the bag was weighed again a. Calculate the % mass change of this dialysis bag from the following information: • Mass of bag before experiment: 15.39 • Mass of bag after experiment: 12.79 b. Determine the tonicity of the beaker when it is compared to the dialysis bag: 2. facell had...
. For each of the 3 situations below, use an arrow to indicate the net movement...
. For each of the 3 situations below, use an arrow to indicate the net movement of water into or out of the cell through the semipermeable plasma membrane (i.e. osmosis). (Assume that the sugar molecules cannot pass through the plasma membrane in each case.) 1% sugar (inside a circule) 3% sugar (inside a circule) 1% sugar (inside a circule) 5% sugar 1% sugar 1% sugar 3. In each of the drawings above, indicate if the inside of the cell...
If a potato core is allowed to dehydrate by sitting in open air, would the water potential of the potato cells decrease or increase
If a potato core is allowed to dehydrate by sitting in open air, would the water potential of the potato cells decrease or increase? i think it decreases but i'm not sure. and if a plant cell has a lower water potential than its surroundings and if pressure=0, is the cell hypertonic(in terms of solute concentration) or hypotonic to its environment? will the cell gain or lose water? any ideas...?http://en.wikipedia.org/wiki/Water_potentialanalysis queswhat is water potential?Osmosis Lab /27819 Name: ________________________________ Date: ___________...
Experiment 2: Diffusion Concentration Gradients and Membrane Permeability Data Tables Table 2: Indicator Reagent Data Indicator...
Experiment 2: Diffusion Concentration Gradients and Membrane
Permeability
Data Tables
Table 2: Indicator Reagent Data
Indicator
Starch Positive
Starch Negative
Glucose Positive
Glucose Negative
Glucose Test Strip
n/a
n/a
green
yellow
IKI Solution
dark blue
light brown
n/a
n/a
Table 3: Diffusion of Starch and Glucose Over
Time
Indicator
Dialysis Bag After 60 Minutes
Beaker Water After 60 Minutes
Glucose Test Strip
yellow
green ( if all glucose passed to the beaker from the bag)
IKI
from incolore changed to...
Dorothea is a 72-year-old black woman who is 5 ft 5 in tall and weighs 149...
Dorothea is a 72-year-old black woman who is 5 ft 5 in tall and weighs 149 pounds. She has coronary heart disease and a long-standing history of hypertension with progressive loss of kidney function. She recently started receiving hemodialysis and is gaining about 4 pounds/day between treatments. She has convinced herself that because she is on dialysis, she can eat and drink whatever she wants and "the machine will take care of it." Yesterday, she ate the following as shown...
Use the Nernst equation to calculate the theoretical value of E of th copper-concentration cell and compare this value...
Use the Nernst equation to calculate the theoretical value of E of th copper-concentration cell and compare this value with th cell potential you measured. E = E* - 0.0592 / n * logQ **So I believe this is the equation that I would use. However, i'm don't know what E* is suppose to be...** The my electrochemistry experiment the cell potential that i measured were: 0.130V, 0.115V, and 0.110V (average cell potential = 0.118V) The concentration of the copper...
How Do Kidneys Work? The functional unit of the mammalian kidney is called a nephron and it is similar to a piece of dialysis tubing. The nephron's chief function is to regulate the concentration of water and soluble substances like sodium salts by filtering the blood. reabsorbing what is needed, and excreting the rest as urine. Quantities of blood plasma that contain dilute amounts of urea are filtered into the nephron. Moving water from the inside of the nephron to...
Osmosis 5. Did water flow into or out of the plant cells (potato cells) in each of the samples examined? How do you know this? 6. Would this experiment work with other plant cells? What about with animal cells? Why or why not? 7. From what you know of tonicity, what can you say about the plant cells and the solutions in the test tubes? What do your results show about the concentration of the cytoplasm in the potato cells...
Osmosis 5. Did water flow into or out of the plant cells (potato cells) in each of the samples examined? How do you know this? 6. Would this experiment work with other plant cells? What about with animal cells? Why or why not? 7. From what you know of tonicity, what can you say about the plant cells and the solutions in the test tubes? What do your results show about the concentration of the cytoplasm in the potato cells...
POST-LAB QUESTIONS / HOMEWORK 1. A student performed the following osmosis experiment, similar to the one you did, using a different combination of substances. Determine his/her results and explain them by answering the questions in the table by filling in the blank boxes. Assume that the dialysis bag is impermeable to sucrose. Set-up 1 Set-up 2 Set-up 3 Set-up 4 Set-up 5 Bags 15 mL in each Tap water Tap water 55% sucrose 21% sucrose solution solution Tap water Beakers...
CRITICAL THINKING QUESTIONS 1. A pre-weighed dialysis bag which contained a solution of 10% glucose was placed in a beaker containing a solution of 20% glucose. After one hour, the bag was weighed again a. Calculate the % mass change of this dialysis bag from the following information: • Mass of bag before experiment: 15.39 • Mass of bag after experiment: 12.79 b. Determine the tonicity of the beaker when it is compared to the dialysis bag: 2. facell had...
Experiment 2: Diffusion Concentration Gradients and Membrane
Permeability
Data Tables
Table 2: Indicator Reagent Data
Indicator
Starch Positive
Starch Negative
Glucose Positive
Glucose Negative
Glucose Test Strip
n/a
n/a
green
yellow
IKI Solution
dark blue
light brown
n/a
n/a
Table 3: Diffusion of Starch and Glucose Over
Time
Indicator
Dialysis Bag After 60 Minutes
Beaker Water After 60 Minutes
Glucose Test Strip
yellow
green ( if all glucose passed to the beaker from the bag)
IKI
from incolore changed to...
Dorothea is a 72-year-old black woman who is 5 ft 5 in tall and weighs 149 pounds. She has coronary heart disease and a long-standing history of hypertension with progressive loss of kidney function. She recently started receiving hemodialysis and is gaining about 4 pounds/day between treatments. She has convinced herself that because she is on dialysis, she can eat and drink whatever she wants and "the machine will take care of it." Yesterday, she ate the following as shown...
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