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Which type of cartilage is densely packed with collagen?

A.

hyaline cartilage

B.

areolar cartilage

C.

fibrocartilage

D.

elastic cartilage

Answer and Explanation

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 E

Explanation

A. collagen, organic phosphate
This mixes the categories. Collagen is organic, and "organic phosphate" isn’t the correct term for bone mineral content.

B. calcium phosphate compound, osteoblasts and osteocytes
Osteoblasts and osteocytes are cells, not part of the organic matrix. The organic matrix is composed of proteins, primarily collagen.

C. collagen, calcium phosphate compound
This reverses the correct order. Calcium phosphate is inorganic, collagen is organic.

D. collagen, osteoblasts and osteocytes
Again, includes cells instead of matrix materials.

E. calcium phosphate compound, collagen
The inorganic matrix = hydroxyapatite (a calcium phosphate crystal). The organic matrix = collagen fibers, which give tensile strength and flexibility

Correct Answer is A

Explanation

A. terminal; vellus
Terminal hairs are thick and pigmented. During puberty, hairs typically change from vellus to terminal, not the reverse.

B. lanugo; vellus
Lanugo is the fine hair present on fetuses, not typical of pre-pubertal facial hair.

C. vellus; lanugo
This is also in Lanugo is not a stage in puberty; it is lost after birth.

D. lanugo; terminal
While terminal hair is correct, lanugo is irrelevant in this pubertal context.

E. vellus; terminal
During puberty, vellus hair (fine and lightly pigmented) on the face is replaced by terminal hair (thicker, darker, and coarser) under the influence of androgens.

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