AP BIOLOGY

Detailed explanation-1: -Thyroid hormone influences the force and speed of your heartbeat, your blood pressure, and your cholesterol level. As a result, a malfunctioning thyroid gland can cause problems that masquerade as heart disease or make existing heart disease worse.

Detailed explanation-2: -There are two main parts of your thyroid: the two halves (lobes) and the middle of the thyroid that connects the two lobes (thyroid isthmus). Your thyroid is made of thyroid follicle cells (thyrocytes), which create and store thyroid hormone (mainly T3 and T4), and C-cells, which secrete the hormone calcitonin.

Detailed explanation-3: -The thyroid is a butterfly-shaped gland located at the base of the neck, just below the Adam’s apple. The thyroid produces hormones that regulate heart rate, blood pressure, body temperature and weight.

Detailed explanation-4: -Detailed Solution. The correct option is 2 i.e Salivary gland.