A Typical Hill Plot (Log [Y_O2/(1- Y_O2)] Vs Log P_O2)for

question 24

Multiple Choice

A typical Hill plot (log [Y_O2/(1- Y_O2) ] vs log P_O2) for hemoglobin-oxygen binding does not yield a straight line as it does for myoglobin. Which of the following is the best explanation for this?

• A)at high oxygen pressures, hemoglobin is in a low oxygen affinity state
• B)at low oxygen pressures, hemoglobin is in a high oxygen affinity state
• C)hemoglobin undergoes a transition from low affinity state under low oxygen pressure to a high affinity state under high oxygen pressure
• D)hemoglobin undergoes a transition from high affinity state under low oxygen pressure to a low affinity state under high oxygen pressure
• E)none of the above

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Definitions:

Cobalt Treatment

A form of radiotherapy using gamma rays from cobalt-60 to treat conditions such as cancer.

Radiation Absorbed Dose

A measure of the amount of radiation energy absorbed by an object or person, expressed in Grays (Gy).

Rad

An abbreviation for "radical," often used in chemistry to describe highly reactive molecules with unpaired electrons; colloquially, used to express that something is excellent or cool.

Contrast Medium

A substance used in medical imaging to improve the contrast of structures or fluids within the body, enhancing the visibility of blood vessels, gastrointestinal tract, and other areas during radiographic procedures.