According to the sources, the correct statement is that the accumulation of uric acid crystals in joints causes inflammation, a condition known as gout . The other statements are incorrect because: (1) the human vertebral column has 12 thoracic vertebrae, not 10 ; (2) the joints between adjacent vertebrae are cartilaginous joints, which permit limited movement, whereas fibrous joints allow no movement and are found in the skull ; and (3) osteoporosis is commonly caused by decreased levels of estrogen, not progesterone .