Physiology All of the following factors normally increase the length of the ventricular cardiac muscle fibers except: A Increased venous tone. B Increased total blood volume C Increased negative intrathoracic pressure. D Lying-to-standing change in posture 💡 Explanation All of the following factors normally increase the length of the ventricular cardiac muscle fibers except: ✓ Correct Answer: D. Lying-to-standing change in posture