Human anatomy and kinathropometry part 1 condensed Flashcards

1
Q

Functions of periosteum?

A

Isolate bone from surrounding tissues Provide a route for circulatory and nervous supply Participate in bone growth and repair

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2
Q

What is endosteum?

A

An incomplete cellular that: Lines the marrow cavity Contains osteoblasts, osteoprogenitor cells and osteoclasts Is active in bone growth and repair

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3
Q

What is an osteon?

A

Osteocytes arranged in concentric lamellae around a central canal containing blood vessels

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4
Q

What do osteoblasts do?

A

Make and deposit components of bone extracellular matrix Eventually become surround calcified bone and then they become osteocytes

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5
Q

What do osteoclasts do?

A

Degrade and resorb bone for remodelling, by secreting acids and protein-digesting enzymes Dissolve bone matrix and release stored minerals = osteolysis

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6
Q

What do osteocytes do?

A

“watcher cells”, Sit in bone and monitor current status, and help repair damaged bone

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7
Q

What is an osteoid?

A

Unmineralized bone matrix composed of proteoglycans, glycoproteins and collagen, becomes calcified later

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8
Q

Where do you find osteocytes?

A

In matrix only (in the ring of bone)

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9
Q

Where do you find osteoblasts and osteoprogenitor cells?

A

Periosteum + Endosteum

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10
Q

Where do you find Osteoclasts?

A

In endosteum only

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11
Q

What do osteoprogenitor cells do?

A

They are mesenchyme stem cells that divide to form osteoblasts Are located in inner layer of periosteum Assist in fracture repair

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12
Q

How is homeostasis involved in bones and what happens if it isn’t maintained?

A

Bone building by osteocytes and -blasts, must balance the bone recycling from osteoclasts Higher resorption than formation leads to weaker bones

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13
Q

Life cycle of bone cells?

A

Osteoprogenitor cells to osteoblasts to osteocytes Osteoclasts are related to macrophages

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14
Q

What does red bone marrow do?

A

Produce red blood cells, platelets and white blood cells

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15
Q

What does yellow bone marrow do?

A

Produces fat, cartilage and bone

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16
Q

What us endochondral ossification and what are the names of all the steps?

A

Process by which bone tissue is created Formation of bone collar Cavitation Invasion Remodelling Ossification Elongation

17
Q

In Endochondral ossification describe the step of bone collar?

A

Blood vessels grow around the edges of the cartilage Cells in the perichondrium (the connective tissue that envelops cartilage where it is not at a joint.) change into osteoblasts Producing a layer of superficial bone which will continue to grow and become compact bone

18
Q

In Endochondral ossification describe the step of cavitation?

A

Chondrocytes in the centre of the hyaline cartilage of each bone model: Enlarge Forms struts and calcify Die, leaving cavities in cartilage

19
Q

In Endochondral ossification describe the step of invasion?

A

Periosteal bud ( vascular connective tissue bud from the perichondrium) brings blood vessels into the cartillage Bringing osteoblasts and osteoclasts Spongy bone develops at the primary ossification centre

20
Q

In Endochondral ossification describe the step of remodelling?

A

Remodelling creates a marrow cavity Bone replaces cartilage at metaphyses (end border if diaphysis) Diaphysis elongates

21
Q

In Endochondral ossification describe the step of ossification

A

Capilaries and osteoblasts enter the epiphyses (top of the bone) Creating secondary ossification centres

22
Q

In Endochondral ossification describe the step of elongation?

A

Epiphyses fill with spongy bone, but cartilage remains at 2 sites -ends of bones within the joint cavity = articular cartillage -cartillage at the metaphysis = epiphyseal cartillage (plate)

23
Q

What are the 4 steps for the healing of a bone fracture?

A

Hematoma formed (bleeding)
Soft callus
Bony callus
Remodelling

24
Q

What is the plane of movement called sagittal represent?

A

If someone was cut in half splitting their pecs in half

25
Q

What is the plane of movement transverse represent?

A

Wearing a rubber ring in pool Cut in half through belly button

26
Q

What does the plane of movement frontal represent?

A

Cut in half with the line going from shoulder to shoulder

27
Q

Formulas for Fm (maximum muscle force)?

A

Fm = PCSA (physiological cross sectional area) x σ (force per square centrimetre ( will be a given figure)) Fm = (V (volume) x σ) / Fibre length

28
Q

4 types of muscle patterns?

A

Longitudinal: Strap- parrallel lines going downwards
Fusiform - the same but with a bulge
Pennate Unipennate - fibres going diagonal in one direction
Bipennate - fibres diagonal in 2 different directions