Which type of cartilage is densely packed with collagen?
hyaline cartilage
areolar cartilage
fibrocartilage
elastic cartilage
The Correct Answer is C
A. hyaline cartilage: Hyaline cartilage contains fine collagen fibers, but not densely packed ones. It is more glassy and smooth, found in the nose, trachea, and at joint surfaces.
B. areolar cartilage: This is not a valid type of cartilage. “Areolar” refers to loose connective tissue, not cartilage.
C. fibrocartilage: This type of cartilage is rich in dense bundles of collagen, making it very tough and resistant to compression. It’s found in intervertebral discs and the pubic symphysis.
D. elastic cartilage: Elastic cartilage contains more elastic fibers than collagen, allowing flexibility. It is found in the ear and epiglottis.
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Related Questions
Correct Answer is D
Explanation
A. medullary cavity
This cavity holds marrow (red or yellow), not cartilage.
B. epiphyseal line
The epiphyseal line in adults is a remnant of the epiphyseal plate, but does not contain cartilage.
C. ends of the bones
Both Peter and Paul have articular hyaline cartilage at the ends of long bones for joint function.
D. epiphyseal plate
Only children like Peter have an epiphyseal plate (growth plate), which is made of hyaline cartilage. This area allows for bone lengthening during growth and becomes the epiphyseal line in adults like Paul.
E. in periosteum
The periosteum is a connective tissue membrane around bone-not cartilage.
Correct Answer is A
Explanation
A. actin fibers: Actin is a cytoskeletal protein found within cells, not in the extracellular matrix. It supports cell shape and movement but is not part of the matrix fiber system.
B. collagen fibers: These are strong protein fibers found in the extracellular matrix and provide tensile strength.
C. reticular fibers: These are thin, branching fibers composed of collagen and form supportive networks in soft tissues like the spleen and lymph nodes.
D. elastic fibers: Composed of elastin, these fibers provide elasticity to tissues such as skin and blood vessels.
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