skip to main content

Renal Autoregulation — FRCA Primary MCQ

Instant feedback + full explanation. One question, done properly.

HardPhysiology - RenalRenal AutoregulationFRCA Primary

In a healthy normotensive adult, renal autoregulation usually maintains relatively stable renal blood flow and GFR over which mean arterial pressure range?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: B — 80–180 mmHg, the conventional healthy-adult autoregulatory range

The best answer is “80–180 mmHg, the conventional healthy-adult autoregulatory range”. Renal blood flow and GFR are conventionally described as relatively constant between mean arterial pressures of about 80 and 180 mmHg in a healthy person. Myogenic afferent-arteriolar responses and tubuloglomerular feedback mediate this. Chronic hypertension, sepsis, drugs and renal disease can shift or impair the autoregulatory range.

Reference: Royal College of Anaesthetists, Primary FRCA Syllabus 2021: https://www.rcoa.ac.uk/sites/default/files/documents/2026-01/Primary-FRCA-Syllabus.pdf