BSC 2085 CHAPTER 7 QUESTIONS ONLINE UPDATED
ACTUAL Questions and CORRECT Answers
What are the two kinds of bone marrow? What does RED AND YELLOW BONE BARROW ARE THE TWO TYPES OF BONE MARROW.
hemopoietic tissue mean? Which type of bone marrow HEMOPOIETIC tissue in which there is a development of blood cells or other
fits this description? formed elements. RED BONE MARROW
Why is it important to regulate blood calcium BECAUSE IF THE CALCIUM CONCENTRATION IN THE BLOOD IS TOO ELEVATED
concentration within such a narrow range? OR TOO LOW IT CAN AFFECT BLOOD CLOTTING, MUSCLE CONTRACTION,
EXOCYTOSIS, AND NEURON COMMUNICATION
How is vitamin D synthesized, and what effect does it The skin synthesizes vitamin D when exposed to sunlight (UVB radiation),
have on blood calcium concentration?
What is a callus? How does it contribute to fracture Callus is hardened layers of skin that develop when your skin tries to protect itself
repair? against friction and pressure. Layers are also made when fracture repair takes
place to harden the bone and prevent future fracture.
Describe the stages of intramembranous ossification. the flat bones of the skull, parts of the mandible an clavicle are formed this way
Name a bone that is formed in this way. -occurs with a plate of mesenchymal cells at around 7 weeks gestation
-4 stages of intramembranous ossification:
1. formation of primary ossification center
2. calcification of osteoid
3. formation of immature bone trabeculae
4. remodeling of immature bone
Why would osteomyelitis be more likely to occur in an because the bone is opened in an open fracture making it susceptible to
open fracture than in a closed fracture? infections.
Name the four bone shapes and give an example of long bones - femur
each.
short bones - carpal or tarsal
flat bones - skull, sternum
irregular bones - vertebrae
List three or more functions of the skeletal system other • Movement
than supporting the body and protecting some of the • Electrolyte balance
internal organs. Acid-base balance
What effect does calcitonin have on blood calcium it lowers blood calcium levels by Osteoclast inhibition and Osteoblast stimulation.
concentration, and how does it produce this effect? PTH raises blood calcium levels by 1) Binds to receptors on osteoblasts, then 2)
Answer the same questions for parathyroid hormone. Promotes calcium reabsorption by the kidneys, less lost in urine, 3) Promotes the
final step of calcitriol synthesis in the kidneys, enhancing calcium-raising effect of
calcitriol, 4) Inhibits collagen synthesis by osteoblasts, inhibiting bone deposition
name at least 5 types of bone tissue marrow, endosteum,periosteum, nerves, blood vessels and cartilage.
ACTUAL Questions and CORRECT Answers
What are the two kinds of bone marrow? What does RED AND YELLOW BONE BARROW ARE THE TWO TYPES OF BONE MARROW.
hemopoietic tissue mean? Which type of bone marrow HEMOPOIETIC tissue in which there is a development of blood cells or other
fits this description? formed elements. RED BONE MARROW
Why is it important to regulate blood calcium BECAUSE IF THE CALCIUM CONCENTRATION IN THE BLOOD IS TOO ELEVATED
concentration within such a narrow range? OR TOO LOW IT CAN AFFECT BLOOD CLOTTING, MUSCLE CONTRACTION,
EXOCYTOSIS, AND NEURON COMMUNICATION
How is vitamin D synthesized, and what effect does it The skin synthesizes vitamin D when exposed to sunlight (UVB radiation),
have on blood calcium concentration?
What is a callus? How does it contribute to fracture Callus is hardened layers of skin that develop when your skin tries to protect itself
repair? against friction and pressure. Layers are also made when fracture repair takes
place to harden the bone and prevent future fracture.
Describe the stages of intramembranous ossification. the flat bones of the skull, parts of the mandible an clavicle are formed this way
Name a bone that is formed in this way. -occurs with a plate of mesenchymal cells at around 7 weeks gestation
-4 stages of intramembranous ossification:
1. formation of primary ossification center
2. calcification of osteoid
3. formation of immature bone trabeculae
4. remodeling of immature bone
Why would osteomyelitis be more likely to occur in an because the bone is opened in an open fracture making it susceptible to
open fracture than in a closed fracture? infections.
Name the four bone shapes and give an example of long bones - femur
each.
short bones - carpal or tarsal
flat bones - skull, sternum
irregular bones - vertebrae
List three or more functions of the skeletal system other • Movement
than supporting the body and protecting some of the • Electrolyte balance
internal organs. Acid-base balance
What effect does calcitonin have on blood calcium it lowers blood calcium levels by Osteoclast inhibition and Osteoblast stimulation.
concentration, and how does it produce this effect? PTH raises blood calcium levels by 1) Binds to receptors on osteoblasts, then 2)
Answer the same questions for parathyroid hormone. Promotes calcium reabsorption by the kidneys, less lost in urine, 3) Promotes the
final step of calcitriol synthesis in the kidneys, enhancing calcium-raising effect of
calcitriol, 4) Inhibits collagen synthesis by osteoblasts, inhibiting bone deposition
name at least 5 types of bone tissue marrow, endosteum,periosteum, nerves, blood vessels and cartilage.
