You are collecting and analyzing the secretions of a gland and you find phospholipids. The gland could be all of the following except:

A. callus formation, hematoma formation, callus ossification, remodeling of bone
Incorrect sequence. Hematoma forms first, followed by soft callus, then hard callus (ossification), then remodeling.

B. remodeling of bone, callus ossification, hematoma formation, callus formation
This sequence is completely out of order; remodeling is the final step, not the first.

C. hematoma formation, callus formation, callus ossification, remodeling of bone
This is the proper order:

1. Hematoma(blood clot) forms immediately after fracture
2. Callus formation(fibrocartilaginous soft callus) bridges the break
3. Callus ossification(hard callus) replaces cartilage with bone
4. Remodelingreshapes the bone to restore structure and strength

D. callus ossification, callus formation, remodeling of bone, hematoma formation
Incorrect-chronologically reversed.

E. hematoma formation, callus ossification, callus formation, remodeling of bone
The ossification step comes after the initial callus formation, not before.

A. in the medullary cavity of a long bone
In adults, the medullary cavity contains yellow marrow, not red marrow.

B. in the epiphysis of a flat bone
Flat bones (e.g., skull) don’t have epiphyses. This answer is anatomically inaccurate.

C. in the medullary cavity of a flat bone
Flat bones don’t have a true medullary cavity. Red marrow is found in their spongy bone, not in a central cavity.

D. in the epiphysis of a long bone
Red marrow in adults is found in the spongy bone of the epiphyses of long bones and in flat bones like the sternum and pelvis.

E. in the epiphyseal plate of a long bone
The epiphyseal plate is made of cartilage, not marrow. It is involved in growth, not hematopoiesis.