PhysioEx Lab Report
Exercise 1: Cell Transport Mechanisms and Permeability
Activity 4: Simulating Filtration
Name: Sara Ross
Date: 27 January 2023
Session ID: session-82b0670b-a09f-3f63-f0d1-ccb8c92cfc1b
Pre-Iab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly
1 Filtration is a process that
You correctly answered: is passive.
2 Filtration is dependent upon a
You correctly answered: hydrostatic pressure gradient
3 The filtrate
You correctly answered: All of these answers are correct.
4 An important place that filtration takes place in the body is in
You correctly answered: the kidneys
Experiment Results Predict Questions
1 Predict Question 1: What effect will increasing the pore size of the filter have on the filtration rate?
Your answer: The filtration rate will increase.
2 Predict Question 2: What will happen if you increase the pressure above the beaker (the
driving pressure)?
Your answer: The filtration rate will increase.
Stop & Think Questions
1 The reason none of the solutes were present in the filtrate was that
You correctly answered: the solutes were all too large to pass through
2 Whatoeesty answasedinathmdriving nrersureoresresnond to in the body?
Experiment Data
Run Number
Solute
MWCO
Pressure (mm Hg)
Filter Rate (ml/sec) 1.00
Residue
Start Conc. (mg/ml) 5
Filter Conc. (mg/ml) 0.00
1
Na* CI-
20
50 50 50
present
1 1
Urea Glucose Powdered Charcoal
20
1.00 1.00
present
5 5
0.00 0.00
20
present
1
20
50
1.00
present
5
0.00
2 2 2
Na* CI-
50 50
50 50 50
2.50 2.50 2.50
present present present
5 5 5
4.81
Urea Glucose Powdered Charcoal Na* CI-
0.00 0.00
50
2
50
50
2.50
present
5
0.00
3 3 3
200 200
50 50 50
10.00
present
5 5 5
4.81 4.74 4.39
Urea
10.00
present
Glucose Powdered Charcoal
200
10.00
present
3
200
50
10.00
present
5
0.00
4
Na* CI- Urea Glucose Powdered Charcoal
200 200 200
100 100
20.00 20.00
present present
5 5 5
4.81 4.74
4
4
100
20.00
present
4.39
4
200
100
20.00
present
5
0.00
Post-Iab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly
1 After filtration, substances that pass through the filter are called the filtrate, which includes
You correctly answered: all of the above
2 The top beaker in the simulation corresponds to
You correctly answered: the blood capillary
3 Why was there not 100% recovery of the Na *CI'solute with any of the membranes?
You correctly answered: Some of the solute remained on the membrane filter.
4 An increase in blood pressure would probably initially
filtration in the kidneys.
You correctly answered: increase the rate of.
Review Sheet Results
1 Explain in your own words why increasing the pore size increased the filtration rate. Use an analogy to support your statement. How well did the results compare with your prediction?
Your answer:
My prediction was correct. By increasing the pore size, it allows larger molecules to pass
through. An analogy for this is like a window, when it