Which statement about cartilage and bone is true?
A) Some vertebrate skeletons are composed entirely of cartilage, with no bone.
B) Adult human skeletons are composed entirely of bone, with no cartilage.
C) Bone contains crystals of calcium carbonate, similar to the mineral component of a clam shell.
D) The bone matrix in many vertebrates serves as a reservoir of glycogen.
E) A principal extracellular fiber in cartilage is myosin.

Question

Quizplus · Accepted Answer

Some vertebrate skeletons, such as those of sharks and rays, are composed entirely of cartilage and have no bone.

Answer: C
 Bone contains crystals of calcium phosphate, not calcium carbonate.

Answer: D
 The bone matrix in many vertebrates, including humans, serves as a reservoir of calcium and phosphate, not glycogen.

Therefore, the correct answer is A, C, and D. Choice B and E are incorrect statements.

Which Statement About Cartilage and Bone Is True