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30 - ATPL Question Bank in English - Why is flying immediately after a whole-blood donation inadvisable?

Question 30 - Human Performance and Limitations - ATPL - Airline Transport Pilot Licence

Donation removes all dissolved nitrogen, inevitably causing decompression sickness.
Temporary effects can include light-headedness or fainting, and blood loss temporarily reduces oxygen-carrying capacity.
The resting heart rate always falls to a critically low level after donation.
Donation increases circulating blood volume and immediately produces hypertension.

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