The Frank-Starling mechanism explains why aerobic exercise increases stroke volume. Which physiological principle underlies this mechanism? A. increased venous return stretches myocardial fibers, resulting in a more forceful contraction and greater systolic ejection B. sympathetic stimulation decreases the contractility of the heart during exercise C. aerobic training reduces the elasticity of the ventricular walls, allowing greater filling Answer in the poll, then explain your rationale below in the comments! I'll follow up with my breakdown of the question after enough people have responded. From Chapter 6: Adaptations to Aerobic Endurance Training Programs DCO Code: 1.E2 NOTE: Image is for illustration purposes, not needed to answer the question.

A soccer player recovering from an ankle sprain shows proprioceptive deficits. Balance training is implemented to restore proprioceptive function. Which sensory receptors are being retrained to improve ankle stability during dynamic movements? A. Only muscle spindles in the ankle plantar flexors B. Joint proprioceptors and muscle spindles in ankle muscles, enhancing reflex stabilization C. Only cutaneous mechanoreceptors in the skin of the foot Answer in the poll, then explain your rationale below in the comments! I'll follow up with my breakdown of the question after enough people have responded. From Chapter 1: Structure and Function of Body Systems DCO Code: 1.D1 NOTE: Image is for illustration purposes, not needed to answer the question.