Musculoskeletal System

Question 1

Bone structure?

Answer 1

Cortical bone strong dense

And trabecular bone spongy lightweight porous

Then marrow cavity

Question 2

What makes bone?

Answer 2

Osteoblasts form bone (all BuiLders)
(Become osteocytes when trapped by new bone)

Found in the surface of bone and marrow cavity
Secretes proteinous organic matrix
Matrix solidifies when phosphatase is secreted

Question 3

What breaks down bone?

Answer 3

Osteoclasts (bone CLearance)

Derived from blood cell line and formed on fusion of precursor cells

Question 4

Bone resorption

Answer 4

Osteoclasts mediated process
-H ions proteases collagenases releases

Required for remodelling radial growth maintaining vascularity and more

Question 5

How do muscles attach to bone?

Answer 5

Indirect attachment most common where muscle tendon attaches to periosteum of bone

Direct attachment is tendon fuses to bone

Question 6

Muscles operate in pairs

Answer 6

Agonist and antagonist

Question 7

What are the three types of muscle movement

Answer 7

Reflex
Rhythmic (like walking)
Voluntary (playing piano)