Experiment 4 : Transport Across Membrane
Objektif
1. to determine the sucrose concentration which is isotonic to potato cells
2. to determine the osmotic pressure of potato cells in atmospheric unit
3. to determine the sodium chloride concentration that cause haemolysis and creanation
Exercise 4.1 : Osmotic pressure of potato cells
Exercise 4.2 : Heamolysis and creanation of blood cells
Must refer to your result because different student showed different result, the intacellular constituent of the erythrocytes is different individually
Questions
1. a) What is the concentration of NaCl for haemolysis to occur?
b) Explain your answer
must refer to your result (less or equal to 0.4%, different student showed different result)
because the solution is clear at that concentration, erythrocytes have burst, therefore no erythrocyte can be seen in that solution
2. a) What is the concentration of NaCl for crenation to occur?
b) Explain your answer
must refer to your result (more or equal to 0.6%, different student showed different result)
because the solution is cloudy, erythrocytes have crenated or shrink.
1. to determine the sucrose concentration which is isotonic to potato cells
2. to determine the osmotic pressure of potato cells in atmospheric unit
3. to determine the sodium chloride concentration that cause haemolysis and creanation
Exercise 4.1 : Osmotic pressure of potato cells
Exercise 4.2 : Heamolysis and creanation of blood cells
 |
| Shrink |
 |
| Swollen |
Questions
1. a) What is the concentration of NaCl for haemolysis to occur?
b) Explain your answer
must refer to your result (less or equal to 0.4%, different student showed different result)
because the solution is clear at that concentration, erythrocytes have burst, therefore no erythrocyte can be seen in that solution
2. a) What is the concentration of NaCl for crenation to occur?
b) Explain your answer
must refer to your result (more or equal to 0.6%, different student showed different result)
because the solution is cloudy, erythrocytes have crenated or shrink.
Cell Devision
Cell Devision
At the end of this topic, students should be able to:
At the end of this topic, students should be able to:
3.1 The concept of cell division
- Explain cell division,
- state the importance of cell division in living organisms.
3.2 The cell cycle
- Explain the stages in cell cycle
3.3 Mitosis
- Describe the four stages of the mitotic cell division.
- Explain the behaviour of the chromosomes at each stage
- Describe briefly the cytokinesis process.
- Compare the cell division in animal and plant.
- State the significance of mitosis.
3.4 Meiosis
- Explain and compare the processes in meiosis I and meiosis II.
- Explain the position and changes of the chromosomes at each stage.
- Define chromatid, synapsis, bivalent, tetrad, chiasma, crossing over and centromere.
- State the significance of meiosis.
- Compare meiosis and mitosis.
Langgan:
Catatan (Atom)