Stretch Increases the Force of Cardiac Contraction Mainly by

Multiple Choice

Stretch increases the force of cardiac contraction mainly by

A) Increasing the size of the Ca²⁺ transient
B) Increasing the sensitivity of the myofilaments for Ca²⁺
C) Increasing the turnover number of activated acto-myosin cross bridges
D) Decreasing the jamming of the myofilaments at short lengths
E) Increasing stretch of passive elements