thyroid hormone

• what is the shape of the thyroid tissue?

  • butterfly-shaped
• this butterfly-shaped endocrine gland, nestled in the neck, exerts profound influence over physiological processes through the secretion of thyroid hormones.

  • Thyroid tissue
• the thyroid gland consists of how many lobes?

  • two lobes
• the lobes are connected by an _ that houses follicular structures.

  • isthmus
• orchestrate hormone synthesis

  • thyroid follicular cells
• what are the two thyroid hormones?

  • thyroxine (t4), triiodothyronine (t3)
• thyroid hprmones regulates:

  -metabolism, growth, development
• embedded within the thyroid tissue are __ that is crucial for thyroid hormone synthesis.

  • epithelial linings
• epithelial lining is controlled by what hormone?

  • thyroid stimulating hormones
• TSH is from what gland?

  • pituitary gland
• what is the purpose of epithelial linings?

  • iodine uptake, conversion of thyroglobulin into active hormones
• responsible for producing calcitonin

  • parafollicular cell or C cells
• what hormone is involved in calcium homeostasis

  • calcitonin
• disease that may affect the thyroid gland

  -hyperthyroidism
• staining technique used to visualize thyroid tissue in the laboratory

  • hematoxylin and eosin stain
• functional zones:

  • thyrocytes, parafollicular cells
• sticky fluid in the follicles

  • colloid