Questions and Guide Answers
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1. If fetal arterial pressure begins to fall below normal levels
Answer: A. BARORECEPTORS CAUSE VASOCONSTRICTION AND INCREASE THE FHR
An increase in arterial blood pressure produces vessel distension and causes arterial baroreceptors to send neuronal
messages to the cardioinhibitory center, which in turn causes rapid slowing of the fetal heart rate via the parasympa-
thetic vagus nerve. A decrease in arterial pressure results in an increased heart rate.
Source: https://perigen.com/what-regulates-fetal-heart-rate/
2. Which of the following is an extrinsic influence on the FHR?
Answer: Fetal-placental circulation
3. Fetal heart rate vaiability is definded as fluctuations in the baseline that are
irregular in
Answer: AMPLITUDE and FREQUENCY
4. The most highly oxygenated blood in fetal circulation is carried by