muscular system Flashcards
1
Q
NMJ
A
- brain signals neuron to attach to muscle
- calcium channels open in the neuron
- ACH is released into junction
- ACH bonds to the sarcalema
- sodium potassium pump opens
- ACH depolarizes
2
Q
Ec Coupling
A
- Depolarized ACH causes action potential near sarcolema
- action potential causes SR to release calcium in muscle
- calcium bonds to troponin
- troponin rotates tropomyson to reveal actin heads
3
Q
Crossbridging
A
- myosin heads bond to actin using ADP + Phosphate
4
Q
sliding filament theory
A
- power stroke happens and myosin pulls actin to mid line
- ATP comes and detaches so muscle releases
5
Q
Skeletal muscle coverinngs
A
epimysium - entire muscle covering
perimysium - covers muscle fascicle
endomysium - covers muscle fiber
6
Q
types of joints
A
Diarathesis - freely movable
synarthosis - non movable
ampiarthrosis - slightly movable
7
Q
synovial joint (freely movable)
A
hinge ex. humerus + ulna
plane ex. carpal + metacarple
ball + socket ex. glenohumeral
pivitol ex. radius + ulna
condylar ex
saddle ex
