What resides in the medullary cavity of long bones?
Spongy bone only.
Compact bone only.
None of these.
Bone marrow.
The Correct Answer is D
Bone marrow is the soft, spongy tissue that fills the medullary cavity of long bones.
Bone marrow contains hematopoietic stem cells that produce blood cells, as well as fat cells and other supportive cells.
Choice A is incorrect because spongy bone is not the tissue that fills the medullary cavity, but the type of bone tissue that surrounds it.
Spongy bone has a porous structure that provides strength and flexibility to the bone.
Choice B is incorrect because compact bone is not the tissue that fills the medullary cavity, but the type of bone tissue that forms the outer wall of the diaphysis.
Compact bone has a dense and hard structure that provides protection and support to the bone.
Choice C is incorrect because none of these is not a valid answer.
The medullary cavity of long bones does contain a specific type of tissue, which is bone marrow.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
The ethmoid bone is a part of the axial skeleton, not the appendicular skeleton.
The axial skeleton consists of the bones of the skull, vertebral column, ribs, and sternum.
Choice A is incorrect because the ulna is a part of the upper limb, which is supported by the pectoral girdle.
Choice C is incorrect because the ilium is a part of the hip bone, which forms the pelvic girdle.
Choice D is incorrect because the patella is a part of the lower limb, which is supported by the pelvic girdle.
Correct Answer is ["Intercondylar eminence of the tibia"]
Explanation
The intercondylar eminence of the tibia is a prominent bony ridge located on the superior aspect of the tibial plateau, which is the top surface of the tibia bone that articulates with the femur.
The eminence separates the two condyles of the tibia and serves as an attachment site for several ligaments, including the anterior and posterior cruciate ligaments of the knee joint.
These ligaments play a critical role in stabilizing the knee joint and preventing excessive forward or backward movement of the tibia relative to the femur.
The intercondylar eminence also provides a surface for the menisci, which are C- shaped fibrocartilaginous structures that help absorb shock and distribute forces in the knee joint.
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