Question

which structures are unique to the fetal skull and provide additional space for molding the head shape as the baby passes through the birth canal?
trabeculae
fontanels
sinuses
sutures
question 2 1 pts
hematopoiesis is carried out in the:
osteoclasts.
osteocytes.
yellow bone marrow.
red bone marrow.
question 3 1 pts
until bone growth in length is complete, a layer of the cartilage, known as the _____, remains between the epiphysis and diaphysis.
ossification plate
proliferating zone
zone of hypertrophy
epiphyseal plate

Explanation:

• Question 1: Fontanels are soft - spot areas of connective tissue in the fetal skull that allow for head molding during birth. Trabeculae are parts of spongy bone, sinuses are cavities in bones, and sutures are fibrous joints between skull bones that are not unique for molding like fontanels.
• Question 2: Hematopoiesis, the formation of blood cells, occurs in red bone marrow. Osteoclasts break down bone, osteocytes are mature bone cells, and yellow bone marrow mainly stores fat.
• Question 3: The epiphyseal plate is the layer of cartilage between the epiphysis and diaphysis that remains until bone growth in length is complete. The ossification plate is not a standard term in this context, the proliferating zone and zone of hypertrophy are parts of the epiphyseal plate but not the overall structure name.

Answer:

• Question 1: B. fontanels
• Question 2: D. red bone marrow
• Question 3: D. epiphyseal plate