Skeletal System | HAP | PRELIMS

Each long bone consists of a central shaft called diaphysis, and two ends called ____?

Choose the correct function of Articular Cartilage from the following

What is in between each epihpysis and diaphysis?

Cavity is inside diaphysis

Yellow Marrow consists mostly of...?

Consists of blood-forming cells and is the only site of blood formation in adults, in adults this is confined to the bones the central axis of the body and in the proximal epiphyses of the limb. What is the long bone in question?

Dense Connective tissue that covers the outer surface of the above.

Thinner connective membranes that lines the surface of the medullary cavity

Bone-cells that become surrounded by matrix.

Bone-forming cells, functions in the formation of bone as well as in the repair and remodelling of the bone

Bone-destroying cells, responsible for bone resorption

These are thin sheets of extracellular matrix

Tiny canals with the extracellular matrix

Spaces between the osteocytes

Mostly solid matrix and cells

Consist a lacy network of bone with many small, marrow-filled spaces.

Compact bone forms most of the _________ of long bones and the thinner surfaces of all other bones

Most of the lamellae of compact bone are organized into sets of concentric _____, with each set surrounding central canal, or haversion canal.

Each central canal, with the lamellae and osteocytes surrounding it, is called a/an...?

Delicate interconnecting rods or plates of the bones, which resemble the beams or scaffolding of a building.

Formation of bone by bone-forming cells

Occurs when osteoblasts begin to produce bone in connective tissue membrane.

Bone formation that occurs inside the cartilage

Bone formation that occurs within connective tissue membranes

When bone increases in width or diameter.

The following are all correct regarding bone repair except..?

_______ is the major storage site of calcium in the body

When blood calcium levels are too low, osteoclast activity _____ osteoclast ______ calcium form bone into the blood, and the blood calcium levels increase.

If blood calcium levels are too high, osteoclast activity ________, osteoblast ______ calcium from the blood to produce new bone, and the blood calcium level decrease

Stinulates kidneys to form active Vitamin D, which increases calcium absorption in the small intestine

Secreted from the parathyroid glands when blood calcium levels are too low

Increases renal excretion of calcium

Decreases osteoclast activity and thus decreases blood calcium levels

Secreted from the thyroid gland when blood calcium levels are too high

Increases calcium uptake from the urin in the kidney

Stimulated increased bone breakdown and increased blood calcium indirectly stimulating osteoclast activity

The average human skeleton has an a verage of ___ bones divided into two divisions.

Correct division of bones in the human skeleton

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