Biology 30 – Nervous And Endocrine System Practice Test

The thyroid gland is the one that fits this description. It’s a two-lobed gland located in the front of the neck, connected by a thin tissue band called the isthmus. Its main job is to produce thyroid hormones (T3 and T4) that set the body's metabolic rate—how quickly cells burn energy, regulate heat production, and influence growth and development. Iodine from the diet is essential to make these hormones, and their release is controlled by signals from the brain (hypothalamus and pituitary). Adrenal glands sit on top of the kidneys and handle stress responses and mineral balance, not metabolism in the neck. Parathyroid glands are tiny glands near the thyroid that regulate calcium. The pituitary gland hangs at the base of the brain and controls many other glands, not located in the neck. So, the gland described is the thyroid.