Week 7 Quiz

Bone has blood vessels, nerves, and cells inside a hard, calcified matrix. Which tissue family does bone belong to?

Select one.

• Epithelial tissue, because it covers the body
• Supportive connective tissue, like cartilage
• Muscle tissue, because bones move the body
• Nervous tissue, because nerves run through it

Blood calcium has dropped, and calcium must be freed from bone. Which bone cell resorbs bone and releases its calcium into the blood?

Select one.

• The osteoblast
• The osteocyte
• The osteoclast
• The osteogenic cell

A phalanx is one of the smallest bones in the hand. Which shape class does it belong to?

Select one.

• Long bone
• Short bone
• Sesamoid bone
• Irregular bone

A virtual microscope shows a sample from inside the end of a long bone. Which description fits spongy bone?

Select one.

• Osteons packed side by side around central canals
• Concentric lamellae forming the solid outer wall
• A fibrous membrane covering the outer surface
• A lattice of trabeculae with red marrow and no osteons

A child's femur gets longer each year. Where does a long bone add length?

Select one.

• In the middle of the diaphysis
• At the epiphyseal plates near its ends
• Inside the medullary cavity
• Under the periosteum along the shaft

True or false: once an adult stops growing taller, the bone tissue in that adult's skeleton stops changing.

True or false.

• True
• False

In the calcium-homeostasis loop, blood calcium falls below its set point. Which signal and which effector bring it back up?

Select one.

• Parathyroid hormone, which stimulates osteoclasts
• Calcitonin, which stimulates osteoclasts
• Parathyroid hormone, which stimulates osteoblasts
• Calcitonin, which inhibits osteoclasts

Select every job that belongs to the skeletal system.

Select every option that applies.

• Protecting internal organs
• Producing blood cells in red marrow
• Storing fat in yellow marrow
• Pumping blood through the vessels
• Secreting sebum onto the skin

Which of these bones formed by intramembranous ossification, straight from mesenchyme with no cartilage model first?

Select one.

• The femur
• The humerus
• The clavicle
• A phalanx

In a growing long bone, the epiphyseal plate sits in each metaphysis. Which tissue makes up the plate?

Select one.

• Compact bone built from osteons
• Dense regular connective tissue
• Stratified squamous epithelium
• Hyaline cartilage