What would a long bone look like at the end of adolescence if bone remodeling did not occur?

Video transcript

Hi, everyone. Let's look at our next problem. A condition in which bone tissue is replaced with fibrous tissue, causing the bones to become weak and prone to fracture is known as a fibrous dysplasia. B, osteoporosis, C osteomalacia or D Paget's disease. Well, we're talking about a condition where bone tissue gets replaced with fibrous tissue and that's choice. A fibrous dysplasia, we do have kind of a clue in the name dysplasia is a term for abnormal growth. So, combined with fibrous, that kind of would help you match that with the condition. Uh It's a rare genetic disorder. It can strike at any age and can affect one or many bones. And as our question says, can cause uh fractures, pain, bone deformity and hearing and vision problems. If it affects bones in the skull, let's look through our other answer or choices, choice B osteopetrosis. Um If you know this root here of petra, meaning rock, um you can kind of guess or match that. It's a condition. Uh Also a rare genetic condition, sometimes called marble bone disease where the bone actually becomes too dense. That's where you'd get that phrase marble bone. So the bone becomes overly dense and perhaps counterintuitively, it causes a higher risk of fractures due to reduced bone resorption. So the bones aren't getting renewed essentially and they're far more fragile despite being harder or more dense, but that's not what we're looking for. So choice B not our answer. Choice C is osteomalacia and this would be softening or weakening of bone tissue and that, that softening and weakening is due to demineralization. So it can be caused by vitamin D or calcium deficiency but not what we're looking for here. So not our answer. Then finally twist the Paris disease and this is a disorder which causes abnormal bone remodeling and it can cause enlarged, weakened bones, deformities, pain, arthritis and hearing loss, but not the disease we're looking for in our question, which is the condition where you have bone being replaced with fibrous tissue causing those bones to become weak. And that's choice. A fibrous dysplasia. See you in the next video.