Q: A student is viewing a specimen under the 40X objective lens. If the field of vision is $$0.5 \ mm at $$this magnification, what would be the approximate field of vision under the 10X objective lens, assuming the field of vision is inversely proportional to magnification?

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

Question 1

Which part of a binocular compound microscope is responsible for concentrating light onto the specimen, and should be positioned as close to the stage as possible for optimal illumination?

Accepted Answer

Condenser

Question 2

A student is using a microscope with a 10X ocular lens and a 40X objective lens. What is the total magnification achieved?

Accepted Answer

$$10 	imes 40 = 400$$

Question 3

When switching from a low power objective lens to a high power objective lens, what happens to the field of vision?

Accepted Answer

It decreases

Question 4

Which microscope component is used to regulate the amount of light passing through the specimen by rotating a lever attached to the device?

Accepted Answer

Iris diaphragm

Question 5

A blood smear is best observed under which objective lens, and why?

Accepted Answer

100X oil immersion lens, because it provides the highest resolution for small objects like blood cells

Question 6

Which specimen preparation technique involves shaving a thin piece from the whole specimen to permit light to reveal greater structural detail?

Accepted Answer

Section

Question 7

If the resolving power of a microscope is $$0.2 \ \mu m$$, what does this mean in terms of the microscope's ability to distinguish objects?

Accepted Answer

Objects closer than $$0.2 \ \mu m$$ cannot be distinguished as separate

Question 8

Which of the following best describes the function of the coarse adjustment knob on a microscope?

Accepted Answer

It is used for bringing the specimen into rough focus by adjusting the distance between the objective lens and the specimen

Question 9

During observation, a student moves the slide to the left while looking through the ocular lenses. In which direction does the image appear to move?

Accepted Answer

To the right

Question 10

Which of the following is NOT a primary germ layer formed during embryonic development?

Accepted Answer

Epidermis

Question 11

A student observes that as magnification increases, the working distance between the objective lens and the slide:

Accepted Answer

Decreases

Question 12

Which tissue type is classified based on the types of cells present, their arrangement, and the amount/type of extracellular material?

Accepted Answer

Epithelial tissue

Question 13

What is the main function of the revolving nosepiece on a microscope?

Accepted Answer

To switch between different objective lenses

Question 14

Which preparation method is most appropriate for observing living, unstained cells in suspension?

Accepted Answer

Smear or Drop

Question 15

If a microscope has a 10X ocular lens and a 4X scanning objective, what is the total magnification?

Accepted Answer

$$10 	imes 4 = 40$$

Question 16

Which of the following statements about stem cells is TRUE?

Accepted Answer

Pluripotent stem cells can give rise to a more limited variety of cell types than totipotent stem cells

Question 17

Which of the following best describes the function of the sub-stage light in a microscope?

Accepted Answer

Provides illumination that passes through the specimen and lenses to the eye

Question 18

Which of the following is a correct sequence of organizational levels in the human body from least to most complex?

Accepted Answer

Cell, tissue, organ, organ system

Question 19

A student is viewing a specimen under the 40X objective lens. If the field of vision is $$0.5 \ mm at $$this magnification, what would be the approximate field of vision under the 10X objective lens, assuming the field of vision is inversely proportional to magnification?

Accepted Answer

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

Microscopic Anatomy: Microscopy, Cells, and Histology of Epithelial Tissues

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