Question

What was the effect of thyroxine injections on the hypophysectomized rat's bmr? how does the bmr in this case compare with the normal rat's bmr? was the dose of thyroxine in the syringe too large, too small, or justright?

Answer 1

Thyroxine is a hormone that is  secreted by the thyroid gland to the blood stream. BMR is the basal metabolic rate that is affected by the levels of thyroxine hormone in the system. Hypophysectomy is the removal of the pituitary gland from an organism, in this case the rats. BMR rate of the rat seemed to increase with the injection of thyroxine however the BMR was still lower than the BMR of a normal rat with the thyroid gland  and the dose was too low.