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A and P Lab
| Question | Answer |
|---|---|
| The radius exhibits the anatomy of a flat bone. | False. The radius is a long bone. |
| A long bone is composed of an epiphysis with a diaphysis at both ends. | False. |
| Ossification of the fetal catilaginous skeleton begins at parturition. | False. Begins sooner. |
| Osteogenesis is primarily intramembranous. | False. It is primarily endochondral. |
| Osteoclasts produce bone in the epiphyseal plate, promoting long bone growth in length. | False. The osteoblasts produce bone in the epiphyseal plate. |
| The osteon is the main structural unit of compact bone. | True. |
| PTH is produced by the parathyroid glands and is secreted when the blood's calcium level drops below normal. | True. |
| Increased STH production following formation of the epiphyseal leads to pituitary dwarfism because the sex hormones are stimulating the cartilage cells | False. |
| Bone remodeling maintains the original bone structure and ceases by age 25. | False. |
| Calcium resorption is important in maintaining the bones' homeostasis of calcium. | False. |
| What is the osteon? | An osteon is a basic unit of compact bone. |
| Osteoporosis is the most common bone disease which abnormally strengthens the bone. | False. |
| Identify the basic structure of a flat bone. | A flat bone is made up of compact bone with spongy bone or diploe in the center. |
| Under what anatomical condition does a bone continue to grow in length? | The presence of the growth plate at the epiphysis of bones. |
| Compare intramembranous and endochondral ossification. | Intramembranous ossification takes place in the membrane of the bone while endochondral ossification takes place in the cartilage of bone. |
| Compare an osteoblast to an osteocyte to an osteoclast. | Osteoblast lays down bone matrix, or produces bone, osteocyte is mature bone cell, and osteoclast removes calcium from bone. |
| What role does collagen play in the bone matrix? | Collagen gives bones resiliency. |
| What type of marrow is found in the medullary cavity of the majority of your bones? What was originally in its place? | Yellow bone marrow. Red bone marrow. |
| What is the major type of cartilage found in fetus? | Hyaline cartilage. |
| What is and what can cause rickets? | Rickets is a bone deformity. Insufficient or lack of calcium and vitamin D can cause rickets. |
| What is the hormonal cause of human giantism? | Hyper secretion of growth hormones during developmental years. |
| Where is calium homeostasis maintained? | In the blood. |
| How does STH and the sex hormones control your final height? | They stimulate the production of osteoblasts. |
| How does mechanical stress affect bone remodeling? |
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