This type of muscle is under direct voluntary control of the brain which can be relaxed or contracted at will. it is called [ ] muscle.

This type of muscle is under direct voluntary control of the brain which can be relaxed or contracted at will. It is called skeletal muscle. These muscle contract and relax to mechanically move the body. All skeletal muscle is under direct voluntary control of the brain and can be stimulated to contract or relax at will, so this is way it is also referred to as voluntary muscle.

The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature