unit 2 Flashcards
Osteocytes
Normal Blood cell
Osteoblasts
Cells that build bone
Controlled by hormones
simple fracture
Bone breaks
Compact fracture
Bone comes out of skin
lots of bacteria
comminuted fracture
Lots of pieces
shattered
depressed fracture
Bone pushed in
stops because of spongy middle layer
impacted fracture
two bones jammed together
ends of break bone
spiral fracture
Breaks like a spiral
greenstick fracture
Bone cracks and doesn’t completely break
epiphysis
At the ends of long bones
Spongy bone
Covered by cartilage
diaphysis
Middle of long bone
Covered by periosteum
Compact bone
cartilage
Strong, flexible, connective tissue that protects joints and bones
periosteum
A fibrous layer covering the diaphysis that keeps out bacteria
epiphyseal plate
Growth plate at epiphysis
Cartilage that expands and turns to bone
Bone gets longer (you get taller)
synovial fluid
The fluid in between two bones in the joint
4 ligaments of the knee
ACL
MCL
PCL
LCL
smooth muscle
Surrounded by internal organs
Involuntary
Does not get tired
skeletal muscle
Attached to bones
Voluntary
Gets tired
cardiac muscle
Makes up heart
Involuntary
Does not get tired
acetylcholine
Neurotransmitter involved in muscle contraction
ATP
Adenosine Triphosphate
ADP
Adenosine Diphosphate
Creatin phosphate
Move phosphate to ADP to make ATP
20 seconds of creatine phosphate
Anaerobic Respiration
No oxygen
Can do for 30-40 seconds
