The result of increased preload on cardiac muscle is?
Lengthening of muscle fibre
Shortening of muscle fibre
No effect
Variable effect
ANSWER: (A) Lengthening of muscle fibreREF: Ganongs 22nd edp. 572Preload is determined by amount of blood reaching the heart; it causes an increase in the muscle fiber length and therefore according to frank starling's law increased force of contraction
Heart: Cardiac Muscle