I asked earlier a question, and I got this answer. Now, my question is: how do you get the 2.5cm= 100um? I have taken a picture of the paramecium in question, with the scale bar (100um), and a ruler showing it’s measurement is around 2.5cm. Is that how we got the 2.5?

I asked earlier a question, and I got this answer. Now, my question is: how do you get the 2.5cm= 100um? I have taken a picture of the paramecium in question, with the scale bar (100um), and a ruler showing it’s measurement is around 2.5cm. Is that how we got the 2.5?

Biomedical Instrumentation Systems

1st Edition

ISBN:9781133478294

Author:Chatterjee

Publisher:Chatterjee

Chapter15: Instrumentation In Medical Imaging

Section: Chapter Questions

Problem 7P

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Concept explainers

Parasitic infections

A parasite is an organism that lives in the body of another organism and obtains food at the expense of the host. There are two kinds of parasites they are internal and external. An internal parasite lives inside another organism and is known as endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite.

Question

100%

Image 1- Paramecium cell
CHINA
100 µm
A. Use the scale bar on the image to approximate the width of the Paramecium cell
B. Based on the size of this organism, in which domain would it be classified?
C. Briefly describe any other features in this image that would
support your classificat

l AT&T
7:57 PM
1 30% O
Stepl
a)
On images, there is given a scale bar so that the
actual sizes of the objects in the provided image
can be appreciated. The space bar is also used on
maps to show that the given length of the bar
approximates to how many meters or kilometers.
Similarly, on microscopic images, the unit of
preferred measurement is micrometer (um).
Step2
b)
The scale bar measures 2.5 cm and this is equated
as 100 um.
Thus, at the given magnification, the equation is
2.5 cm = 100 um
or 1 cm = (100/ 2.5) um
The length of the Paramecium as measured is 7.5
cm
and its width is 1.8 cm
Using the above conversion, the measurements can
be converted to approximate micrometers by:
Length
= 7.5 cm
VX

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