Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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600 µm
60 µm
240 µm
15 µm
![### Human Cheek Epithelial Cells
**Description:**
This image shows human cheek epithelial cells under a microscope. Epithelial cells are a type of cell that forms the outer layer of bodily surfaces and lines hollow organs and structures.
**Question:**
What is the approximate size of one of the nuclei (the dark spot inside the cell)?
**Image Analysis:**
In the microscope image, several human cheek epithelial cells are visible. The cells are stained to highlight their structures, with the cell nuclei appearing as dark spots within each cell.
**Field Diameter:**
The image indicates a field diameter of 240 micrometers (µm). This measurement helps estimate the size of the structures within the field of view, including the cell nuclei.
To determine the approximate size of the cell nuclei:
1. **Measure the Nucleus:** Estimate the fraction of the field diameter occupied by an average nucleus.
2. **Calculate the Nucleus Size:** Multiply the estimated fraction by the field diameter (240 µm).
For example, if a nucleus takes up about 1/5 of the field diameter, its size would be approximately:
\[ \frac{240 \, \text{µm}}{5} = 48 \, \text{µm} \]
Thus, using the field diameter and visual estimation, one can gauge the approximate size of the cell nuclei.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3bdcb517-33ff-466e-a854-9cedbbd09bff%2Fafc4c1aa-d7d0-417b-9b43-d14af8681b89%2Filb13ps_processed.png&w=3840&q=75)
Transcribed Image Text:### Human Cheek Epithelial Cells
**Description:**
This image shows human cheek epithelial cells under a microscope. Epithelial cells are a type of cell that forms the outer layer of bodily surfaces and lines hollow organs and structures.
**Question:**
What is the approximate size of one of the nuclei (the dark spot inside the cell)?
**Image Analysis:**
In the microscope image, several human cheek epithelial cells are visible. The cells are stained to highlight their structures, with the cell nuclei appearing as dark spots within each cell.
**Field Diameter:**
The image indicates a field diameter of 240 micrometers (µm). This measurement helps estimate the size of the structures within the field of view, including the cell nuclei.
To determine the approximate size of the cell nuclei:
1. **Measure the Nucleus:** Estimate the fraction of the field diameter occupied by an average nucleus.
2. **Calculate the Nucleus Size:** Multiply the estimated fraction by the field diameter (240 µm).
For example, if a nucleus takes up about 1/5 of the field diameter, its size would be approximately:
\[ \frac{240 \, \text{µm}}{5} = 48 \, \text{µm} \]
Thus, using the field diameter and visual estimation, one can gauge the approximate size of the cell nuclei.
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