Cytology: Semen Analysis

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  • 1/27 Questions

    The opacity of an ejaculate reflects spermatozoa concentration. 

    • True
    • False
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About This Quiz

This quiz on Cytology: Semen Analysis assesses knowledge on semen sample collection, analysis, and its components. It evaluates understanding of ejaculate volume, sperm concentration, and wave motion, relevant for students and professionals in reproductive health studies.

Cytology: Semen Analysis - Quiz

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  • 2. 

    In semen samples, the _____ volume is larger than ______ concentration. It varies between collection methods. 

    • Ejaculate, spermatozoa

    • Spermatozoa, ejaculate

    • Sperm, ejaculate

    • Volumetric flask, then actual flask

    Correct Answer
    A. Ejaculate, spermatozoa
    Explanation
    In semen samples, the volume refers to the amount of fluid ejaculated, while the concentration refers to the number of spermatozoa (sperm) present in the fluid. The volume of ejaculate can vary depending on factors such as hydration levels and collection methods, whereas the concentration of spermatozoa remains relatively constant. Therefore, it is expected that the volume of ejaculate is larger than the concentration of spermatozoa in semen samples.

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  • 3. 

    What stain is used for counting live:dead ratio ?

    • Eosin + negrosin

    • Diff quick

    • Wright's stain

    • New Methylene Blue

    Correct Answer
    A. Eosin + negrosin
    Explanation
    Eosin + negrosin stain is used for counting live:dead ratio. This stain combination allows for differentiation between live and dead cells based on their ability to take up the dyes. Live cells appear pink/red due to eosin staining, while dead cells appear blue/black due to negrosin staining. By counting the number of live and dead cells, the live:dead ratio can be determined.

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  • 4. 

    Bulls have high sperm density, therefore they would show vigorous swirling. 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Bull's da maaaaaaaaaaan.

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  • 5. 

    Semen analysis requires diluting the sperm at a ratio of ____.

    • 1:200

    • 1:100

    • 1:2000

    • 1:1000

    Correct Answer
    A. 1:200
    Explanation
    Semen analysis requires diluting the sperm at a ratio of 1:200. This means that for every 1 part of sperm, 200 parts of diluent are added. Dilution is necessary in order to accurately assess the concentration and motility of sperm in a sample. By diluting the sample, it allows for a more manageable number of sperm to be counted and evaluated under a microscope. This dilution ratio ensures that the sperm count is within a measurable range and provides a more accurate representation of the sperm's characteristics.

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  • 6. 

    The volume of the ejaculate reflects fertility. 

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Not really.

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  • 7. 

    What would you do if the morphology suggests semen is normal but the motility poor?

    • Take another sample and analyze it

    • Retest the same sample

    • This male should be banned from breeding EVER AGAIN !

    • Give the male some motility enhancing drugs

    Correct Answer
    A. Take another sample and analyze it
    Explanation
    If the morphology suggests that the semen is normal but the motility is poor, it would be advisable to take another sample and analyze it. This is because the initial sample may have been affected by external factors or may not be representative of the male's overall fertility. By taking another sample and analyzing it, a more accurate assessment of the male's fertility can be made.

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  • 8. 

    Motility analysis: What happens if you excessively dilute the sample ?

    • Evaluation will be difficult

    • Motility will stop

    • The spermatozoa will drown :(

    • It doesn't affect the evaluation

    Correct Answer
    A. Evaluation will be difficult
    Explanation
    Excessively diluting the sample in motility analysis can make it difficult to evaluate the spermatozoa effectively. Dilution is necessary to ensure accurate counting and observation of the sperm's movement, but excessive dilution can lead to a decrease in concentration, making it harder to assess motility accurately. This can result in less reliable results and hinder the evaluation process.

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  • 9. 

    When using a hemacytometer to count sperm, the whole central grid is observed at ______ magnification.

    • 40x

    • 10x

    • 100x

    • 1000x

    Correct Answer
    A. 40x
    Explanation
    When using a hemacytometer to count sperm, the whole central grid is observed at 40x magnification. This magnification allows for a clear and detailed view of the central grid, which is essential for accurate counting of sperm. Higher magnifications such as 100x or 1000x may provide a closer view of individual sperm cells, but they may also limit the field of view and make it difficult to count the entire central grid accurately. Therefore, 40x magnification is the most suitable for this purpose.

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  • 10. 

    When collecting semen samples, the volume of the ejaculate is measured with a _____.

    • Volumetric flask

    • Graded tube

    • Erlinmeyer flask

    • We don't measure it cause it hurts the self-esteem of the bull

    Correct Answer
    A. Volumetric flask
    Explanation
    A volumetric flask is a laboratory glassware that is specifically designed to measure and hold a precise volume of liquid. It has a narrow neck and a flat bottom, allowing for accurate measurement of the volume. When collecting semen samples, it is important to measure the volume of the ejaculate to assess fertility and reproductive health. Using a volumetric flask ensures that the volume is measured accurately and precisely, which is crucial for accurate analysis and interpretation of the sample.

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  • 11. 

    When counting Live:Dead ratio, count ___ sperm at 100x and express the results as a _____.

    • 200, percentage

    • 1000, percentage

    • 200, decimal number x10^9/mL

    • Live, HURRAH THEY'RE ALIIIIIVE

    Correct Answer
    A. 200, percentage
    Explanation
    When counting the Live:Dead ratio, it is stated that we should count 200 sperm at 100x magnification and express the results as a percentage. This means that out of the 200 sperm counted, we need to determine the percentage of live sperm versus dead sperm.

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  • 12. 

    Live:Dead ratio- Dead sperm take up the stain and look ____. 

    • Pinkish red

    • White

    • Blue/black

    • Rainbow-colored

    Correct Answer
    A. Pinkish red
    Explanation
    When dead sperm take up the stain, they appear pinkish red.

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  • 13. 

    The average amount of ejaculate in bulls is ____, and in stallions, it is ____.

    • 5 mL, 65 mL

    • 65 mL, 5 mL

    • 70 mL, 85 mL

    • 15 mL, 35 mL

    Correct Answer
    A. 5 mL, 65 mL
    Explanation
    You go stud.

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  • 14. 

    Motility: A satisfactory sample should have at least _____. 

    • 60%

    • 70%

    • 55%

    • 80%

    Correct Answer
    A. 60%
    Explanation
    A satisfactory sample should have at least 60% motility. This means that at least 60% of the sample should be able to move or exhibit movement. Motility is an important factor to assess the quality of a sample, as it indicates the viability and functionality of the cells or organisms present. A lower percentage of motility may suggest poor quality or health of the sample.

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  • 15. 

    Very good motility of spermatozoa should show moderate linear activity. 

    • True

    • False

    Correct Answer
    A. False
    Explanation
    Rapid linear activity.

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  • 16. 

    Live:Dead ratio- Live sperm resist staining and appear ____ against  a _____ background.

    • White, blue/black

    • Blue, white

    • White, blue/purple

    • Angry, anarchy

    Correct Answer
    A. White, blue/black
    Explanation
    Live sperm resist staining and appear white against a blue/black background. This is because live sperm have intact cell membranes that prevent the stain from penetrating and coloring the sperm. The blue/black background helps to create contrast and make the white sperm more visible.

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  • 17. 

    Wave motion is based on _____ observed in a drop of semen on a microscope slide at _____ magnification. 

    • Swirling activity, low

    • Swirling activity, medium

    • Linear activity, low

    • Wiggle wiggle wiggle! *Saxophone*

    Correct Answer
    A. Swirling activity, low
    Explanation
    This answer suggests that wave motion is based on the swirling activity observed in a drop of semen on a microscope slide at low magnification. This implies that the movement of waves can be compared to the swirling activity of semen, and that this activity is more prominent at low magnification.

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  • 18. 

    After doing your sperm count with a hemacytometer, you multiply the number by _____.

    • 2 million/mL

    • 10^9 /L

    • 1 million/mL

    • 2 thousand/L

    Correct Answer
    A. 2 million/mL
    Explanation
    After doing a sperm count with a hemacytometer, the number obtained represents the concentration of sperm in a given volume. To convert this concentration to a more standard unit, such as million/mL, the number obtained from the count is multiplied by 2 million/mL. This conversion allows for a more easily interpretable and comparable measurement of sperm concentration.

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  • 19. 

    Which of these are components of the ejaculate? (Select all that apply)

    • Sperm free fraction

    • Sperm rich fraction

    • Sperm poor fraction

    • Sperm bourgeois fraction

    • Sperm billionaire fraction

    • Sperm DonaldTrump fraction

    Correct Answer(s)
    A. Sperm free fraction
    A. Sperm rich fraction
    A. Sperm poor fraction
    Explanation
    The components of the ejaculate include the sperm free fraction, sperm rich fraction, and sperm poor fraction. These fractions refer to different concentrations of sperm within the ejaculate. The sperm free fraction contains sperm that are not bound to any other substances. The sperm rich fraction contains a high concentration of sperm, while the sperm poor fraction contains a lower concentration of sperm. The other options, such as sperm bourgeois fraction, sperm billionaire fraction, and sperm DonaldTrump fraction, are not valid components of the ejaculate.

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  • 20. 

    Select the methods of collecting semen samples. 

    • Artificial vagina

    • Electroejaculation

    • Massage

    • Cone of shame

    • Spermocentesis

    Correct Answer(s)
    A. Artificial vagina
    A. Electroejaculation
    A. Massage
    Explanation
    The correct answer includes methods that are commonly used for collecting semen samples. An artificial vagina is a device designed to simulate the female reproductive tract and collect semen during natural mating. Electroejaculation is a method that involves the use of electrical stimulation to induce ejaculation and collect semen. Massage is a technique that involves manually stimulating the male reproductive organs to collect semen. These methods are widely used in veterinary and human reproductive medicine for semen collection purposes. The other options, Cone of shame and Spermocentesis, are not methods used for collecting semen samples.

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  • 21. 

    Select the things that should be AVOIDED while handling semen samples. 

    • Marked temperature changes

    • Water

    • Disinfectants

    • Saline

    • Clean equipment

    • Warmed equipment (37 degrees C)

    Correct Answer(s)
    A. Marked temperature changes
    A. Water
    A. Disinfectants
    Explanation
    Semen samples should be handled with caution to ensure their quality and integrity. Marked temperature changes should be avoided as they can lead to denaturation of proteins and damage the sperm cells. Water should also be avoided as it can dilute the semen and affect its concentration. Disinfectants should be avoided as they can be toxic to sperm cells. It is important to use clean equipment to prevent contamination, but warmed equipment at 37 degrees Celsius should also be avoided as it can cause premature activation of sperm cells.

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  • 22. 

    The average amount of ejaculate in dogs is ____. In cats, the average is _____.

    • 10 mL, 0.04 mL

    • 5 mL, 0.04 mL

    • 65 mL, 35 mL

    • 0.07 mL, 0.03 mL

    Correct Answer
    A. 10 mL, 0.04 mL
    Explanation
    Dogs typically have an average amount of ejaculate of 10 mL, while cats have an average amount of ejaculate of 0.04 mL.

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  • 23. 

    Wave motion is ______ if sperm concentration is ______.

    • Decreased, decreased

    • Decreased, increased

    • Increased, decreased

    • Increased, increased

    Correct Answer
    A. Decreased, decreased
    Explanation
    If the sperm concentration is decreased, it means that there are fewer sperm present. In wave motion, the movement of particles is dependent on the number of particles present. Therefore, if the sperm concentration is decreased, there will be fewer sperm available to contribute to wave motion, resulting in a decrease in wave motion. Similarly, if the sperm concentration is decreased, it means that there are more sperm present. This increase in the number of sperm will lead to an increase in wave motion.

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  • 24. 

    Motility: A diluted drop of semen with warm ______ saline and a coverslip, observed at ______ magnification.

    • Physiological, medium

    • Sterile, medium

    • Physiological, low

    • Sterile, low

    Correct Answer
    A. Physiological, medium
    Explanation
    The correct answer is "Physiological, medium." When examining motility in semen, a diluted drop of semen is mixed with warm physiological saline, which helps to maintain the physiological conditions necessary for sperm motility. The sample is then observed under a microscope at medium magnification to assess the movement and activity of the sperm. Using a sterile medium or observing at low magnification would not provide accurate results for assessing sperm motility.

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  • 25. 

    Select all the components that should be analyzed when handling a semen sample. 

    • Volume and gross appearance of ejaculate

    • Sperm motility and concentration

    • Live:Dead sperm ratio

    • Sperm morphology

    • Other cells found

    • Method of collection

    • How the horse felt when they collected his sperm

    • The FULL NAME of the person who collected the sperm

    Correct Answer(s)
    A. Volume and gross appearance of ejaculate
    A. Sperm motility and concentration
    A. Live:Dead sperm ratio
    A. Sperm morphology
    A. Other cells found
    Explanation
    The components that should be analyzed when handling a semen sample include the volume and gross appearance of ejaculate, sperm motility and concentration, live:dead sperm ratio, sperm morphology, and other cells found. These factors provide important information about the quality and health of the semen sample, which can affect fertility and reproductive success. The method of collection and the feelings of the horse during the collection process are not relevant components to analyze. The full name of the person who collected the sperm is also not necessary for the analysis of the sample.

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Apr 20, 2016
    Quiz Created by
    Thesortinghat
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