Concept explainers
a.
To define: Cytology
Introduction: Cell is a membrane bound unit that is present in all living beings and constitutes the basic unit of life. It contains different organelles to carry out different functions. Some cells are specific to their functions.
a.
Explanation of Solution
The branch of biology that deals with the study of cell and the cellular organelles are called as cytology. Cytology is the field that is concerned with the
b.
To explain: The way in which the cell biologists use a Transmission Electron Microscope (TEM) to study.
Introduction: Cells are fundamental unit of life. Some cells are macroscopic and some cells are microscopic. Cells show different shapes and sizes. Cells work together to perform common functions. Cells consists of different organelles that have different shapes and sizes and perform specialized functions.
b.
Explanation of Solution
A Transmission Electron Microscope (TEM) directs an electron beam through a thin-cut section of the specimen. A two-dimensional image of the specimen is focused either onto a screen or onto a photographic film. A TEM allows the cell biologist to visualize the details of the specimen’s internal structures. In TEM, the specimen magnifies up to 50,000X.
c.
To explain: What does a scanning electron microscope (SEM) shows the best.
Introduction: Unicellular organisms are raised from single cell, but multi-cellular organisms are raised from many cells. Microscopy is the use of microscope to view the small-scale structures. It has an important role in anatomic investigation.
c.
Explanation of Solution
The SEM is best used to see the three-dimensional surface structure of a specimen. A SEM is a type of electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons.
d.
To explain: The advantages of light microscope to have over both TEM and SEM.
Introduction: The light microscopy stains help in visualizing the cell components by binding to specific cell components and influencing the light beam that passes through them. In contrary, in electron microscopy, stains bind differently to cell components and help in generating images by influencing the beam of electrons that passes through the specimen.
d.
Explanation of Solution
Microscopy is the use of microscope to see an object that cannot be seen by the naked eye. Light microscopy uses the light to view the specimen, but in electron microscopy, a beam of electron is used to view the specimen. Light microscope is to study the living cells and the TEM and SEM is to study the magnified view of the cell. The light microscope shows fewer artifacts than TEM and SEM.
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Chapter 6 Solutions
Study Guide for Campbell Biology
- B. TYPICAL PLANT LEAF CELL (Western Pond Weed): Pond weed is a great plant for studying plant cells, because the leaves are only two cells thick and it is easy to make mounts and view the cells under the microscope. Use the "close the book" method to make a wet slide of one pond weed leaf. The instructor will demonstrate the procedure. Place the slide on a compound scope and use the "stair- step" procedure to focus on a few cells of the leaf at high power. You should definitely be able to see cell walls and chloroplasts. Rarely, you may see a nucleus. In some of the cells, you may notice that the chloroplasts are moving. They seem to cycle around the center of the cell. This is called cyclosis, and is caused by the cytoplasm streaming around the vacuole carrying some organelles with it. Draw and label ONE cell on the provided drawing area of the next page and label using the labels below: CELL WALL, CHLOROPLASTS, VACUOLE, NUCLEUS (if visible) CPID 810186 10arrow_forwardScanning electron microscope can be used for () A. Observe images of different sections of cells B. Observe living cells C. Quantitative analysis of chemical composition in cells D. Observation of cell surface stereomorphology E. Observation of cellular activityarrow_forwardCompare the cells in the two photomicrographs below in terms of their shape and structure(s). А Barrow_forward
- Please explain what is an optical section image. For the imaging techniques discussed in class, please name two techniques that are used to create optical section images in thick living tissues? Please explain the basics of how each of these two techniques creates optical sectioning.arrow_forwardBriefly describe the role of 3D printing in tissue engineering. Also describe its working principle.arrow_forwardwords 6. Below is the photomicrograph of the human cheek cells viewed under the high power objective. Label the parts of the cell that is visible. Answer questions a and b a. The light microscope used in the laboratory is not powerful enough to view other organelles in the cheek cells. What parts of the cell werevisible? C b. List 2 organelles that were not visible but could be present in the cells. English (United States) Accessibility: Investigatearrow_forward
- a. What type of cell is shown? (the large one at the center of the image) b. How do you know what type of cell this is? c. Identify the structure the arrow. d. What does the appearance of the structure at the arrow mean? (In other words, what does it tell us the cell can do?)arrow_forward3. Search for "microscopy." Find the distinct features of two-photon microscope and scanning acoustic microscope. Identify their specific application in science and technology.arrow_forward1. What is the view of the tissue section under a light microscope? * A. whole mount B. 2-D image C. 3-D image D. stereoscopic 2. Why do you need to wrap the petri plates with used bond papers? * A. to prevent condensation. B. to prevent breakage C. to prevent contamination D. all of these are correctarrow_forward
- Write a detail note on microscopy and histology.arrow_forward18) Conduct 1-2 of these investigations and take screenshots of the data in the Lab Review Description tab for each. Note: The screenshot tool is available under the 1) Build a model of a cell, out of household materials of your choice, that shows at least 5 major cell organelles in addition to the cell membrane and nucleus. You can use the organelles you studied in the "Cell Structure" Gizmo®. Take a photo of your model and upload the image in the appropriate field. Tools icon in the upper right of the Gizmo®. Save the screenshot image file. Upload your screenshot into the field below. 19) What assumptions does the simulation make about a cell? Would a red blood cell behave in a similar way? What about a plant cell? Explain your answer.arrow_forwardThe use of the natural source of light collected by the mirror and condensed by the diaphragm is a characteristic of which type of microscope? A. Transmission Electron Microscope B. Scanning Electron Microscope C. Compound Light Microscope D. Single Lens Microscope Based on your answer in the previous item, what specific surface of mirror is wise to be used? A. concave surfaced В. convex surfaced С. any kind of surfaced can be used D. plain surfacedarrow_forward