Flat bones of the skull, sternum, and ribs are formed by:

Question

BlackTom AI · Accepted Answer

Question: Flat bones of the skull, sternum, and ribs are formed by:

Option 1: endochontral ossification. This option is inconsistent with the typical formation of flat bones, which arise directly from mesenchyme without a cartilage scaffold in a process called intramembranous ossification. Endochondral ossification primarily forms long bones and involves a cartilage model that is later replaced by bone. Therefore, this statement is incorrect for flat bones.

Option 2: bone resorption. Bone resorption is the process of removing bone tissue, typically carried out by osteoclasts during remodeling. It is not a mechanism for forming new flat bones, so this choice does not describe how skull, sternum, or rib bones are created. Thus, this is incorrect.

Option 3: intramembranous ossification. This is the classic pathway for forming flat bones. In intramembranous ossification, mesenchymal cells condense and differentiate directly into osteoblasts, which lay down bone matrix and form immature woven bone that remodels into mature compact and spongy bone. This aligns precisely with how flat bones like those of the skull, sternum, and ribs develop, making this the correct mechanism in this context.

Option 4: osteogenesis. While osteogenesis refers to bone formation in a general sense, it is an umbrella term and does not specify the exact process or sequence (intramembranous vs. endochondral). Relying on this broad term misses the key distinction that flat bones form via intramembranous ossification, so this option is not accurate for the question as asked.

Option 5: bone deposition. Similar to osteogenesis, bone deposition describes a general aspect of bone formation or growth rather than naming the specific developmental pathway. Since the question asks for the process specific to flat bones, this broader descriptor is not the correct mechanism in this context. It is therefore incorrect.

9808 WINTER 2025 BRUCE INTENSIVE Laboratory Exam 1: Undergraduate Students (9808)

Flat bones of the skull, sternum, and ribs are formed by:

View Explanation

Log in for full answers

Similar Questions

Which type of bone is formed from a membrane?

Which of the following selections correctly lists the sequence of events that occur during intramembranous ossification?

For intramembranous ossification to take place, which of the following is necessary?

Cranial bones develop ________.

The flat bones of the skull are formed directly within mesenchyme. What is this type of bone development known as?

In a consumer society, many adults channel creativity into buying things

Economic stress and unpredictable times have resulted in a booming industry for self-help products

People born without creativity never can develop it

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler