Tag: PHYSIOLOGY

Thyroid Diseases

Thyroid Diseases

PHYSIOLOGY The thyroid gland secretes the hormones T4 (thyroxine) and T3 (triiodothyronine) which then control metabolism. These hormones act on a wide variety of tissues and in each organ may have slightly different effects. Thyroid hormone secretion is under the control of thyrotropin (a thryoid-stimulating hormone, TSH) which is secreted by the pituitary gland. The [...]

September 28, 2011 More
Lung Disease

Lung Disease

This entry focuses on lung disease during pregnancy. PHYSIOLOGY Hyperventilation is a characteristic feature of pregnancy. During pregnancy, the enlarging uterus causes a progressive upward displacement of the diaphragm, to a maximum of 4 cm. This displacement, however, does not impair diaphragmatic function. The diameter of the chest increases by approximately 2 cm; flaring of [...]

September 16, 2011 More