Shining a red light with a wavelength of 660 nm on a blood sample will cause which of the fol-lowing?
a. HHb will absorb less light than O2Hb.
b. O2Hb will absorb less light than HHb.
c. MetHb will absorb less light than O2Hb.
d. Sulfhemoglobin will absorb more light than HHb.
ANS: B
When a light with a wavelength of 660 nm (red light) shines on a sample site, HHb absorbs more light than O2HB.
Health Professions
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