Q: If a microscope's field of view at 4x objective is 4.5 mm, what is the field of view at 40x objective? Use the formula $$\text{FOV}_1 \times \text{Mag}_1 = \text{FOV}_2 \times \text{Mag}_2.$$

$$\frac{4.5 \times 4}{40} = 0.45 mm$$

Question 1

Which part of the microscope, labeled 'A' in the diagram, is primarily responsible for adjusting the distance between the eyes to match the user's interpupillary distance?

Accepted Answer

The eyepiece (ocular lenses)

Question 2

A student is using the microscope and notices that the image is blurry when switching from low to high power. Which adjustment should be made first to bring the specimen into sharp focus?

Accepted Answer

Use the fine focus knob

Question 3

In the cell model, which organelle is responsible for producing ATP through cellular respiration, and what is its main function?

Accepted Answer

Mitochondrion; energy production

Question 4

If a tissue sample under the microscope shows tightly packed cells with little extracellular matrix and forms the lining of the stomach, which tissue type is most likely being observed?

Accepted Answer

Epithelial tissue

Question 5

A slide shows cells with striations and multiple nuclei located at the periphery. Which tissue is this most likely to be?

Accepted Answer

Skeletal muscle

Question 6

Which microscope part, labeled 'E', is used to adjust the amount of light passing through the specimen?

Accepted Answer

Diaphragm

Question 7

A student observes a tissue with cells embedded in a matrix containing collagen fibers and chondrocytes in lacunae. Which tissue is this?

Accepted Answer

Cartilage

Question 8

Which of the following best describes the function of the Golgi apparatus as seen in the cell model?

Accepted Answer

Modifies, sorts, and packages proteins

Question 9

If the total magnification of a microscope is calculated by multiplying the ocular lens magnification by the objective lens magnification, what is the total magnification when using a 10x ocular lens and a 40x objective lens?

Accepted Answer

$$10 	imes 40 = 400$$

Question 10

A tissue slide shows neurons with long processes and supporting glial cells. Which tissue type is this?

Accepted Answer

Nervous tissue

Question 11

Which microscope part, labeled 'F', is used for making small adjustments to the focus, especially at high magnification?

Accepted Answer

Fine focus knob

Question 12

A cell is observed with an extensive network of membranes studded with ribosomes. What is the primary function of this organelle?

Accepted Answer

Protein synthesis

Question 13

Which of the following best explains why oil immersion is used with the 100x objective lens on a microscope?

Accepted Answer

To reduce light refraction and improve resolution

Question 14

A tissue sample shows cells with a single layer of flat cells lining blood vessels. Which type of epithelium is this?

Accepted Answer

Simple squamous epithelium

Question 15

If a microscope's field of view at 4x objective is 4.5 mm, what is the field of view at 40x objective? Use the formula $$	ext{FOV}_1 	imes 	ext{Mag}_1 = 	ext{FOV}_2 	imes 	ext{Mag}_2.$$

Accepted Answer

$$\frac{4.5 	imes 4}{40} = 0.45 mm$$

Question 16

Which organelle, visible in the cell model, is responsible for digesting cellular waste and foreign material?

Accepted Answer

Lysosome

Question 17

A tissue slide shows adipocytes with large lipid droplets and nuclei pushed to the periphery. What is the main function of this tissue?

Accepted Answer

Energy storage and insulation

Question 18

Which microscope part, labeled 'G', is essential for moving the stage up and down quickly to bring the specimen into general focus?

Accepted Answer

Coarse focus knob

Question 19

A student is examining a tissue with intercalated discs and branching fibers. Which tissue is this, and what is its primary function?

Accepted Answer

Cardiac muscle; pumping blood

Question 20

Which of the following best describes the function of ribosomes as seen in the cell model?

Accepted Answer

Protein synthesis

BIO 137 Lab Practical Exam 0 Study Guide: Microscopy, Cell Model, and Tissue Slides

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