Final answer:
Lordosis is an excessive anterior curvature of the lumbar region, not the thoracic vertebrae, making the statement false. Kyphosis is the condition associated with an excessive curvature of the thoracic region, often due to osteoporosis.
Step-by-step explanation:
The statement Lordosis affects the thoracic vertebrae is false. Lordosis is an excessive anterior curvature of the lumbar region, which is most commonly associated with conditions such as obesity or late pregnancy. It occurs when there is an anterior shift in the line of gravity due to the accumulation of body weight in the abdominal region. On the other hand, kyphosis is an excessive posterior curvature of the thoracic region. This condition can develop when osteoporosis causes a gradual collapse of the thoracic vertebrae, leading to a pronounced curvature in the upper back.