This shows that the complexity of an organism is not necessarily related to its size. Then we discarded the used glucose test strip. In doing so, I gained useful microscopy skills such as making wet mount slides, finding the proper magnification for viewing, and drawing microscope observations with all the proper labels.
We then placed the dialysis bag into the solution in the cup. The diffusion of water molecules across the cell membrane is called osmosis. Cilia help the Paramecium move as well as feed. We then waited 30 minutes and worked on an activity relating to Figure 2. These protists exemplify the animal-like and motile types of protozoans.
The movement of water across the cell membrane depends on the concentration of solutes on both sides of the cell membrane. The process of the cell wall pulling away from the cell membrane in a plant cell is called plasmolysis. Unlike the Amoeba and the Paramecium, the Euglena has plant-like characteristics.
All three protists had a nucleus, as expected, but the Paramecium had two nuclei, a micronucleus and a macronucleus. If the Paramecium comes upon an obstacle, it stops, swims backwards, and then angles itself forward on a slightly different course.
This extruding part is the pseudopod, and allows the Amoeba to drag itself from one place to another see Fig.
Sometimes the conclusion may be required to go after the discussion, in which case it will not be a summary of the results but will be what you conclude based on your discussion. Its movement is slow, and changing directions is just a matter of extending a pseudopod in a new direction.
Based on the observations in this lab, protists are very small yet highly complex. Paramecia are smaller than Amoebas.
Hypertonic solutions are solutions with higher amounts of solutes and hypotonic solutions are solutions with a lower amount of solutes. The concentration of the samples can then be worked out from the graph, and recorded in a separate table.
We recorded the initial glucose test result in Table 1. Water is isotonic and moves freely across the cell membrane and helps maintain its fluid mosaic model characteristic.
When water enters the plant cell, the membrane is pressed up against the cell wall and creates turgor pressure. When solute concentration increases, water potential decreases.
Sometimes the conclusion is not separate from the discussion, i. Euglena moved with a flagellum and so is classified as a flagellate see Fig. Conclusion In this lab I learned about the structure and function of the smallest eukaryotic organisms, the unicellular protists. How does diffusion across the cell membrane work.
Glucose was initially in the dialysis bag and is predicted to flow in and out of the dialysis bag and exist in both the cup and dialysis bag. Record your data in tables and use the tabulated data to do the graphs. Pressure potential may be positive, negative, or zero.
The Euglena moves rapidly, using its flagellum to propel itself through the water rather quickly, shifting directions with whip-like movements. Pure water has a water potential of 1 atmosphere.
Some lecturers will be happy with a reference to the method, e. We then collected the final amounts of glucose and completed Table 1. Access Expansion Below is an extended example of a report structure that looks at how you might arrange the hierarchy of headings and subheadings. View Prac report turnonepoundintoonemillion.com from BIOL at Royal Melbourne Institute of Technology.
Saekyol Oh S Prac report 4 Exercise 1 Aim The aim of this experiment was to. Tampa Bay Buccaneers Injury Report: The official injury report of the Buccaneers. advantage, UPEC uses secreted toxins to stimulate the host response (1, 2).
Cytotoxic Necrotizing Factor 1 (CNF1) and sublytic levels of the pore-forming type 1 secreted α-hemolysin, are capable of causing host cell apoptosis as well as exfoliation and nutrient release (1, 2).
Log in to your Practice Fusion EHR account with valid email and password. Practice Fusion is the #1 cloud-based electronic health record (EHR) platform for doctors. prac report 1 and 2.
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