Veterinary Lab Techniques 1: Parasitology

How do you safely pick up the microscope?

• Hold it by the arm or base with one hand while supporting the weight with the other hand.
• Use both hands to hold it by the arm or base without supporting the weight.
• Pick it up by the stage with one hand while supporting the weight with the other hand.
• Hold it by the eyepiece and lens with one hand while supporting the weight with the other hand.

Answer explanation

To safely pick up a microscope, you should use both hands. One hand should be placed under the base of the microscope for support, while the other hand should be placed on the arm of the microscope. This method ensures stability and prevents any damage to the microscope. It's important to handle the microscope gently to avoid disturbing any mechanical adjustments.

How do you adjust the focus for each eye separately on a microscope?

• Use the diopter adjustment

• Use a microscope with a single focus adjustment.
• get new eyes

• use an eye piece that best suits you

Answer explanation

The question asks about adjusting the focus for each eye separately. This is typically done using binoculars or similar devices, where each eyepiece can be adjusted independently to match the user's individual eye focus. Since there are no specific options provided, the explanation is based on general knowledge.

What is another name for the 10x objective?

• low power objective
• magnification objective
• high power objective
• medium power objective

Answer explanation

The 10x objective is also known as the low power objective in a microscope. It is used to provide a magnification of 10 times the original size of the specimen being observed. The term '10x objective' refers to the magnification power of this particular lens.

What is another name for the 40x objective?

• high power objective
• ultra power objective
• medium power objective
• low power objective

Answer explanation

The question asks for another name for the 40x objective. However, the options provided do not offer any alternative names. The 40x objective is often referred to as the 'high power' or 'high dry' lens in microscopy, but this information is not available in the given options.

How do you increase the amount of light on your slide on a microscope?

• Adjust shutter speed or white balance settings
• Use a lower wattage light source
• Increase the distance from the light source
• Use the light intensity adjustment knob

Answer explanation

To increase the amount of light on your slide, you can adjust the light source of your projector or use a brighter bulb. If you're using a digital projector, you can increase the brightness setting. Additionally, reducing ambient light in the room can also make the slide appear brighter.

How do you increase contrast on a wet mount such as your prep for fecal analysis?

Answer explanation

To increase contrast on a wet mount, such as in fecal analysis preparation, you can use techniques like adjusting the microscope's light intensity, using a condenser, or employing staining methods. These techniques help to enhance the visibility of the specimen and make it easier to identify and analyze the sample.

Which focus knob is solely used for the 4x and 10x objectives?

• coarse adjustment knob

• fine focus knob
• medium focus knob
• zoom focus knob

Answer explanation

The coarse focus knob is solely used for the 4x and 10x objectives on a microscope. It allows for quick and rough adjustments to bring the specimen into focus at lower magnifications. The fine focus knob is used for higher magnifications, such as 40x and 100x, to make precise adjustments for a clearer image.

Which focus knob is used solely for the 40x and 100x objectives?

• coarse focus knob
• medium focus knob
• zoom focus knob
• fine focus knob

Answer explanation

The question asks about the focus knob used specifically for the 40x and 100x objectives. However, the provided options do not include any relevant choices. Therefore, it is not possible to determine the correct focus knob based on the given information.

When is immersion oil used?

Answer explanation

Immersion oil is used in microscopy when a higher resolution of the microscopic image is required. It is used to increase the refractive index and improve image clarity. Since the question does not provide options, the explanation is based on general knowledge about the use of immersion oil.

How do you prevent immersion oil on your slide from contacting objective lenses other than the 100x?

• Apply more immersion oil to the slide.
• Clean the oil off the slide and objective lenses after use.
• Use a higher magnification objective lens.
• Use a lower magnification objective lens.

Answer explanation

To prevent immersion oil on your slide from contacting objective lenses other than the 100x, you should carefully clean the objective lens and slide after using the 100x oil immersion objective. Additionally, avoid rotating the objective turret to lower magnification lenses after using the oil immersion lens, as this can cause oil to come into contact with other lenses.