Question

how would an elevated level of thyroid hormone in the body affect skeletal muscles?
it would stimulate atrophy.
it would stimulate hypertrophy.
it would stimulate energy use and heat production.
it would decrease heat production by muscle tissue.
it would cause an increase in muscle mass.

Explanation:

Thyroid hormones increase the metabolic rate of cells including skeletal - muscle cells. They stimulate energy use and heat production in the body. They do not directly stimulate atrophy, hypertrophy, or an increase in muscle mass, and they increase rather than decrease heat production.

Answer:

It would stimulate energy use and heat production.