Q: If the field diameter under the 4× objective is 5 mm, what is the approximate field diameter under the 40× objective? (Assume the field diameter is inversely proportional to magnification.)

$$\frac{5\ \text{mm} \times 4}{40} = 0.5\ \text{mm}$$

Q: A student wants to estimate the size of a cell using the field diameter. If the field diameter is 1 mm and approximately 10 cells fit across the field, what is the estimated size of each cell?

$$\frac{1\ \text{mm}}{10} = 0.1\ \text{mm}$$

Q: Which scenario best illustrates the application of the metric system in microscopy?

Estimating the size of a cell in micrometers ($$\mu\text{m})$$

Q: If a microscope's field diameter at 10× is 2 mm, what is the field diameter at 40×?

$$\frac{2\ \text{mm} \times 10}{40} = 0.5\ \text{mm}$$

Q: If a cell measures 0.1 mm in diameter, what is its size in micrometers ($$\mu\text{m}$$)? (Recall: $$1\ \text{mm} = 1000\ \mu\text{m})$$

$$0.1 \times 1000 = 100\ \mu\text{m}$$

Question 1

Which part of the compound microscope is responsible for focusing light onto the specimen, thereby improving image clarity?

Accepted Answer

The condenser

Question 2

A student observes a cheek cell under a compound microscope using a 10× ocular lens and a 40× objective lens. What is the total magnification?

Accepted Answer

$$10 	imes 40 = 400$$

Question 3

When preparing a wet mount, which step is essential to prevent air bubbles from forming under the coverslip?

Accepted Answer

Lowering the coverslip at an angle

Question 4

If the field diameter under the 4× objective is 5 mm, what is the approximate field diameter under the 40× objective? (Assume the field diameter is inversely proportional to magnification.)

Accepted Answer

$$\frac{5\ 	ext{mm} 	imes 4}{40} = 0.5\ 	ext{mm}$$

Question 5

Which organ system is primarily responsible for regulating body temperature and protecting internal organs, as shown in Table 3.1?

Accepted Answer

Integumentary system

Question 6

A student switches from the 10× objective to the 40× objective. What happens to the working distance?

Accepted Answer

It decreases

Question 7

Which metric unit would be most appropriate for measuring the diameter of a cheek cell observed under the microscope?

Accepted Answer

Micrometer ($$\mu	ext{m})$$

Question 8

If a specimen appears blurry under high magnification, which adjustment should be made first?

Accepted Answer

Use the fine adjustment knob

Question 9

Which of the following best describes the path of light in a compound microscope?

Accepted Answer

Light passes through the specimen, then the objective lens, then the ocular lens

Question 10

A student wants to estimate the size of a cell using the field diameter. If the field diameter is 1 mm and approximately 10 cells fit across the field, what is the estimated size of each cell?

Accepted Answer

$$\frac{1\ 	ext{mm}}{10} = 0.1\ 	ext{mm}$$

Question 11

Which scenario best illustrates the application of the metric system in microscopy?

Accepted Answer

Estimating the size of a cell in micrometers ($$\mu	ext{m})$$

Question 12

Which organ system, as described in Table 3.1, is responsible for transporting nutrients, gases, and wastes throughout the body?

Accepted Answer

Circulatory system

Question 13

If a microscope's field diameter at 10× is 2 mm, what is the field diameter at 40×?

Accepted Answer

$$\frac{2\ 	ext{mm} 	imes 10}{40} = 0.5\ 	ext{mm}$$

Question 14

Which step is NOT part of the wet mount preparation procedure?

Accepted Answer

Heating the slide to fix the specimen

Question 15

A student observes epithelial cells at 600× magnification. If the ocular lens is 10×, what is the objective lens magnification?

Accepted Answer

$$\frac{600}{10} = 60$$

Question 16

Which adjustment should be made to increase the contrast of a specimen under the microscope?

Accepted Answer

Close the diaphragm

Question 17

Which of the following is a critical function of the nervous system as outlined in Table 3.1?

Accepted Answer

Transmitting electrical impulses

Question 18

If a cell measures 0.1 mm in diameter, what is its size in micrometers ($$\mu	ext{m}$$)? (Recall: $$1\ 	ext{mm} = 1000\ \mu	ext{m})$$

Accepted Answer

$$0.1 	imes 1000 = 100\ \mu	ext{m}$$

Question 19

Which scenario best demonstrates the importance of proper working distance in microscopy?

Accepted Answer

Switching to a higher objective and accidentally breaking the coverslip

Chapter 3: The Microscope - lab

Study Guide - Practice Questions

Study Guide - Flashcards