Question

which of the following statements is true?
women generally have higher metabolic rates than men.
thyroid hormone levels influence the metabolic rate.
a person who has more muscle mass will have a lower metabolic rate than someone with less muscle tissue.
when your thyroid gland produces too much thyroid hormone, your metabolic rate drops below normal.

Explanation:

• For "Women generally have higher metabolic rates than men": Men usually have higher metabolic rates due to more muscle mass.
• For "Thyroid hormone levels influence the metabolic rate": Thyroid hormones (like thyroxine) regulate the rate of metabolism.
• For "A person who has more muscle mass will have a lower metabolic rate than someone with less muscle tissue": Muscle tissue burns more calories at rest, so more muscle means higher metabolic rate.
• For "When your thyroid gland produces too much thyroid hormone, your metabolic rate drops below normal": Excess thyroid hormone (hyperthyroidism) increases metabolic rate.

Answer:

Thyroid hormone levels influence the metabolic rate.