Final answer:
The statement about heat and treppe is false; treppe's increased efficiency in muscle contractions is due to a higher concentration of calcium ions, not heat stimulating enzyme action.
Step-by-step explanation:
The statement that in treppe, heat released by each twitch stimulates more efficient enzyme action is false. Treppe, also known as the "staircase effect", is a phenomenon observed in muscle physiology where the consecutive contractions of a muscle become progressively stronger when stimuli are provided at a sufficiently rapid pace. This increased efficiency in muscle contraction during treppe is mostly attributed to a higher concentration of calcium ions (Ca++) in the sarcoplasm which enhances the muscle's ability to form cross-bridges.
It is important to note that the heat produced during muscle contractions is not what stimulates the more efficient enzyme action; rather, it is the improved availability of Ca++ due to a steady stream of signals from the motor neuron that causes the enhanced efficiency. Adequate levels of ATP are also crucial for maintaining this effect.