Short Answer
Pre-load: greater ventricular filling → greater stroke volume is the best answer.
Biophysics questions work best when you translate anatomy or instrumentation back into plain physics: pressure gradients, flow, diffusion, energy deposition, imaging contrast, and signal-to-noise.
Frank–Starling: increased ventricular pre-load (end-diastolic volume) stretches myocardium, increasing contractile force and stroke volume.
Why This Answer Is Correct
This is a Medium-level question in Biophysics & Medical Physics. The prompt is really testing whether you can connect the concept to its defining physical relationship instead of picking a nearby-but-wrong term.
Clinical wording can hide a simple physics core. Strip the scenario down to transport, force, energy, or measurement first.
Choices At A Glance
- A. Heart rate only
- B. Pre-load: greater ventricular filling → greater stroke volume
- C. Blood viscosity
- D. Afterload only
When similar options appear on an exam, eliminate the ones that break the core law, use the wrong units, or confuse a definition with a consequence.
Study Next
Review the related formula library
study the medical physics track
Topic Snapshot
Topic: Biophysics & Medical Physics
Difficulty: Medium
Best next move: Re-state the governing law in your own words, then solve one more example from the same topic before moving on.