Weegy: Preload: The degree of stretching of cardiac muscle cells before contraction which is determined primarily by the amount of venous return of blood to the atria and any circumstances that would alter venous return (the length-tension relationship.) (More)

Weegy: Coronary sinus User: Which of the following is not a difference between cardiac and skeletal muscle? Cardiac muscle cells quickly die in the absence of oxygen; skeletal muscle cells are better able to adapt to oxygen deficiency. Cardiac muscle cells contain more mitochondria than do skeletal muscle cells. The plasma membranes of cardiac muscle cells interlock, but skeletal muscle fibers are independent. Cardiac muscle does not use the sliding filament mechanism for contraction; skeletal muscle does. (More)

Weegy: Cardiac muscle cells contain more mitochondria than do skeletal muscle cells. User: Which of the following would increase heart rate? Low metabolic rate Cold temperature Epinephrine Parasympathetic stimulation Weegy: search this link thanku (More)

Weegy: All the above (More)

Weegy: True (More)