Hemoglobin Experiment and Spectrophotometry

The video tutorial demonstrates the effect of pH and partial pressures of oxygen on hemoglobin's ability to bind oxygen. It involves using a vacuum system, a manometer, and a spectrophotometer. The tutorial covers setting up the spectrophotometer, preparing test tubes, blanking the spectrophotometer, and conducting measurements at different vacuum pressures. The experiment shows how hemolysate changes under varying pressures, highlighting the deoxygenation process.

What is the main focus of the experiment discussed in the video?

• The effect of light on hemoglobin

• The effect of pH and partial pressures of oxygen on hemoglobin

• The effect of temperature on hemoglobin

• The effect of sound on hemoglobin

What should you do first when setting up the spectrophotometer?

• Press the zero button

• Set the wavelength to 700 nm

• Turn it on and let it warm up

• Insert the test tube

What is the purpose of the blank tube in the spectrophotometer setup?

• To calibrate the spectrophotometer

• To measure the pH level

• To hold the hemolysate

• To adjust the temperature

What is the pH of the buffer used in the blank tube?

• 6.8

• 7.0

• 7.4

• 8.0

Why is it important to warm up the hemolysate before placing it in the spectrophotometer?

• To decrease its pH

• To change its color

• To increase its volume

• To prevent condensation

What is the target vacuum pressure for the first set of readings?

• 400 mmHg

• 300 mmHg

• 200 mmHg

• 100 mmHg

What should you do after reaching the target vacuum pressure of 300 mmHg?

• Increase the pressure further

• Nudge the valve back slightly

• Turn off the spectrophotometer

• Add more hemolysate

What is the vacuum pressure set to for the second set of readings?

• 700 mmHg

• 600 mmHg

• 500 mmHg

• 800 mmHg

What change is observed in the hemolysate as the vacuum pressure increases?

• It remains the same

• It becomes transparent

• It becomes darker

• It becomes lighter

What does the color change in hemolysate indicate?

• Decreased oxygenation

• Decreased pH

• Increased oxygenation

• Increased pH