The thyroidectomized rat's basal metabolic rate was lower because the thyroid gland's removal rendered it incapable of generating any thyroxine.
Without the pituitary gland to make THS, the metabolic rate would decrease.
The amount of energy used while at rest in a neutral environment after the digestive system has been quiescent for roughly 12 hours is known as the basal metabolic rate (BMR).
It is the speed at which one's metabolism resumes after "fasting" during sleeping.
Normal BMR ranges from negative 15% to positive 5%, with the majority of hyperthyroid patients having a positive BMR of 20% or higher and the majority of hypothyroid patients typically having a negative BMR of 20% or lower.
Your body consumes energy (or burns calories) more quickly if you have a high metabolism or fast metabolic rate than someone with a slower metabolism.
learn more about basal metabolic rates here https://brainly.com/question/27976523
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