Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 3, Problem 1CT
Summary Introduction
To determine: Whether compound light microscope or an electron microscope is the best choice to observe the surface of a microscopic section of bone.
Introduction: Microscope is an instrument used to observe minute organisms which are invisible to the naked eyes. The first microscope was devised by Anton von Leeuwenhoek and later several modifications were made to enhance its resolution and magnification. In the present day, state-of-the-art microscopes are available. The most commonly used microscopes are light microscope and electron microscope.
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Chapter 3 Solutions
Human Biology (MindTap Course List)
Ch. 3 - Describe the general functions of the following in...Ch. 3 - Which organelles are in the endomembrane system?Ch. 3 - Distinguish between the following pairs of terms:...Ch. 3 - What do enzymes do in metabolic reactions?Ch. 3 - In aerobic cellular respiration, which reactions...Ch. 3 - For the diagram of the aerobic pathway shown in...Ch. 3 - The plasma membrane __________. a. surrounds the...Ch. 3 - The _________ is responsible for a eukaryotic...Ch. 3 - Cell membranes consist mainly of a _________. a....Ch. 3 - Prob. 4SQ
Ch. 3 - The passive movement of a solute through a...Ch. 3 - Match each organelle with its correct function.Ch. 3 - Which of the following statements is not true?...Ch. 3 - Enzymes _______. a. enhance reaction rates b. are...Ch. 3 - Match each substance with its correct descriptionCh. 3 - Cellular respiration is completed in the ______....Ch. 3 - Prob. 11SQCh. 3 - In a mitochondrion, where are the electron...Ch. 3 - Prob. 1CTCh. 3 - Jogging is considered aerobic exercise because the...Ch. 3 - Section 3.17 mentions that arsenic poisons human...Ch. 3 - The cells of your body never use nucleic acids as...
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- What type of microscopy is frequently used now for determining the cellular location of a molecule of interest? Briefly describe the basis of this technique.arrow_forwardAssume you are observing the diatom pictured in Figure 1 using the 10X lens in a compound light microscope. You move to the 40X lens and then again to the 100X lens by only rotating the turret (remember that the lenses are parfocal), without making any other adjustments to the microscope. c) After making your adjustments, you notice that the midline of the diatom is in focus while the remainder is blurry. Explain, based on microscopy principles, why this has occurred Provide a description of the procedure to prepare an acidic stain of bacteria using Nigrosin as it would appear in the Methods section.arrow_forward(a) If you were to magnify a cell 10,000-fold (typical of the magnification achievedusing an electron microscope), how big would it appear? Assume you are viewing a“typical” eukaryotic cell with a cellular diameter of 50 μm.(b) If this cell were a muscle cell (myocyte), how many molecules of actin could ithold? Assume the cell is spherical and no other cellular components are present; actinmolecules are spherical, with a diameter of 3.6 nm. (c) If this were a liver cell (hepatocyte) of the same dimensions, how manymitochondria could it hold? Assume the cell is spherical; no other cellular components arepresent; and the mitochondria are spherical, with a diameter of 1.5 μmarrow_forward
- Explain why resolving power is important in microscopy.arrow_forwardThis type of microscope is use to study the detail in samples. It produces a three-dimensional image of the specimen.(a). Compound Light Microscope(b). Scanning Electron Microscope(c). Transmission Electron Microscope(d). Dissection Microscopearrow_forwardWhat are the main characteristics of scanning electron microscopy?arrow_forward
- 3D dimensionality is a limitation of the compound microscope. Depth of field, DOF, describes dimensionality form top to bottom and can be observed with colored cross threads. Observe the crossed thread slide on low power (4x), then on medium power (10x), then on high power (40x objective magnification). Which crossed fiber is on top? How do you know?arrow_forwardYou are trying to track a motor protein dynein movement on a microtubule in a cell using GFP-tagged dynein (GFP- dynein). The motor proteins move very fast on the microtubules. Which type of microscopy will you choose to study this fast dynamic event? Two photon microscopy Total Internal Reflection (TIRF) microscopy O Point scanning confocal microscopy Spinning disc confocal microscopyarrow_forwardWhich of the following microscopes typically requires the use of vital dyes (like methylene blue) to visualize large subcellular structures in a living cell (like the nucleolus or the mitochondrion)? the scanning/tunneling electron microscope (STEM), with good resolution up to about 100,000,000x the transmission electron microscope (TEM), with good resolution up to about 100,000x the scanning electron microscope (SEM), with good resolution up to about 1,000,000x the compound light microscope, with good resolution up to about 1,500x all of the above microscopes would be equally useful in visualizing the interior of organellesarrow_forward
- when carrying the microscope, why should one hand hold the bottom of the base?arrow_forwardUsing the microscope Answer the following questions as you work through this exercise: 1. How is the letter “e” on the slide oriented when you see it with the naked eye as you mount it on the stage (i.e., is it right side up or upside down)? 2. How is the letter “e” on the slide oriented when you see it under low or high power magnification? 3. What effect, if any, does the compound light microscope have on the orientation of the image?arrow_forwardWhat is “parfocal” and why is it important in microscopy?arrow_forward
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