Multiple choice

Which of the following statements is false regarding normal birth in humans?

  1. As the uterus contracts, blood flow through the uterine artery is interrupted.

  2. Fetal blood oxygen levels can be 4 – 6 kPa (30 – 45 mmHg) without causing brain damage.

  3. The fetal brain can use alternative fuels such as ketones, if the supply of glucose is interrupted.  

  4. The umbilical arterial pH is the same or higher than the venous pH.

  5. Most babies are cyanosed at birth.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The umbilical artery caries used blood away from the fetus and so the pH can never be higher than in the vein.

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