Incubator CO2 Level Control Quiz
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Questions and Answers

How do incubators measure and control CO2 levels?

  • Via infrared sensors or thermal conductivity (correct)
  • By analyzing hydrogen levels
  • By measuring oxygen levels
  • Through gravimetric sensors

What is required for the thermal conductivity method to give an accurate CO2 reading in incubator chambers?

  • High airflow
  • No humidity control needed
  • Fully humidified chambers (correct)
  • Low humidity levels

How does atmospheric pressure affect the partial pressure of CO2?

  • Decreases the partial pressure of CO2 (correct)
  • Has no effect on the partial pressure of CO2
  • Increases the partial pressure of CO2
  • Converts CO2 into oxygen

What happens to the molar concentration of CO2 as we rise above sea level?

<p>Decreases (D)</p> Signup and view all the answers

Which medium used for human embryo culture had its pH raised to 7.5-7.6 with bicarbonate?

<p>Waymouth's medium (C)</p> Signup and view all the answers

Which culture media was known as BWW IVF pioneers suggested that Earle's medium could be used for the entire process of IVF?

<p>Earle's medium (C)</p> Signup and view all the answers

What is the effect of a drop in temperature on the solubility of CO2 in culture media?

<p>Decreases (C)</p> Signup and view all the answers

What is the relationship between CO2 concentration and pH in culture media?

<p>Inverse relationship (A)</p> Signup and view all the answers

How does the addition of hydrogen ions affect the pH of a solution?

<p>Makes it more acidic (A)</p> Signup and view all the answers

Why is measuring pH preferred over measuring CO2 in incubators?

<p>CO2 levels are not affected by atmospheric pressure (B)</p> Signup and view all the answers

What is the defining property of a buffered solution?

<p>Ability to resist changes in pH (C)</p> Signup and view all the answers

Why does CO2 depress the pH of culture media during equilibration?

<p>CO2 is an acidic gas (A)</p> Signup and view all the answers

Why is Quinn's human tubal fluid (HTF) considered an advancement in embryo culture media?

<p>It has a pH closer to that of human fallopian tube fluid (B)</p> Signup and view all the answers

Which factor contributed to reduced high multiple pregnancy rates in the mid-90s during human embryo culture?

<p>Embryos reaching day 3 stage before transfer (B)</p> Signup and view all the answers

How does a low oxygen environment benefit human embryo culture?

<p>Improves cell numbers and embryo development (D)</p> Signup and view all the answers

What is the preferred energy substrate for human embryo culture?

<p>Pyruvate (D)</p> Signup and view all the answers

Why is there a lack of widespread agreement on simple versus complex media for human embryo culture?

<p>Lack of properly controlled trials to determine the best media (C)</p> Signup and view all the answers

How can embryos be easily cultured in a low oxygen environment?

<p>Using premixed gas that fills the incubator chamber (C)</p> Signup and view all the answers

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