Bio 114 Chapter 6 Quiz

at which point during embryonic development can most of the adult skeleton be identified?

16 weeks

ectopic bones may occur in which of the following conditions

A: gigantism B: FIBRODYSPLASIA OSSIFICANS PROGRESSIVA (FOP) C: Marfan syndrome D: acromegaly

which of the following is NOT a surface feature of the pelvis?

A: line B: TROCHANTER C: spine D: fossa

all of the following result in decreased calcium levels in the bloodstream EXCEPT __________

PTH stimulation of osteoclasts

what is responsible for appositional growth?

bone is deposited by superficial osteoblasts

C cells of the thyroid gland secrete which of the following

calcitonin

which substance accounts for almost two-thirds of the weight of bone?

calcium salts

during the early stages of endochondral ossification, which cells enlarge, then die and disintegrate?

chondrocytes

To form perforating fibers, osteoblasts from the periosteum cement collagen fibers from tendons, ligaments, and joint capsules into which structures?

circumferential lamellae

which type of fracture occurs in vetebrae that are subjected to extreme stresses?

compression fracture

which bone is NOT formed via intramembranous ossification?

femur

what characteristics may cause life-threatening issues in individuals with Marfan syndrome?

genetic mutation that affects the structure of connective tissue throughout the body

remnants of osteons, which have been almost completely recycled by osteoclasts, are known as _______________

interstitial lamellae

the periosteum contains all the following EXCEPT___________

motor nerves

at puberty, ____________

osteoblast begin producing bone faster than chondrocytes are producing new epiphyseal cartilage

which component is NOT present in spongy bone?

osteons

what class of bones develops inside tendons and is most commonly located near the joints at the knees, the hands, and the feet?

sesamoid bones

what supplies the articular cartilage of the long bones with oxygen and nutrients?

synovial fluid

which structural features of spongy bone are oriented along stress lines and are cross- braced extensively?

trabeculae

Which surface feature is a smooth, grooved articular process shaped like a pulley?

trochlea