Thyroid hormones increase the rate of metabolism in cells throughout the body, and thyroid hormone is made by the thyroid gland in the neck. Given these facts, what in the neck is responsible for an increase in the rate of metabolism in cells among the following options:
- Veins and arteries.
 - thyroid gland
 - veins
 - Energy.
 - spine
 - temperature
 - energy usage
 - liver


 

  thyroid gland       