Question

what accounts for the majority of bone (osseous) tissue matrix?
collagen fibers
calcium salts
bone marrow
osteoid
question 14
2 pts
the ____ exocrine gland stores its secretion until the glandular cell ruptures, whereas the ____ gland releases its apical region and reforms.
eccrine; apocrine
eccrine; endocrine
holocrine; apocrine
apocrine; holocrine

Explanation:

For the first question: Bone (osseous) tissue matrix has about 25% water, 25% osteoid (which includes collagen fibers and ground substance), and 50% calcium salts (hydroxyapatite). Calcium salts are the majority component.
For the second question: Holocrine glands store secretion until cell rupture. Apocrine glands release their apical region and reform. Eccrine glands secrete without cell rupture. Endocrine glands secrete into bloodstream (not relevant here as questions are about exocrine glands).

Answer:

First question: Calcium salts
Second question: holocrine; apocrine