B3.3 Muscle and Motility Flashcards
1
Q
Myofibrils
A
Bundles of protein filaments made up of repeated sacromeres
2
Q
Sarcomere
A
Basic unit of muscle contraction
3
Q
Thin filament
A
Contains proteins actin, tropomyosin, and troponin
4
Q
Titin
A
Spring like protein which recoils during contraction and anchors the myosin to the z-line
5
Q
Antagonistic pairs
A
Muscles which work in pairs; one contracts the other relaxes -> biceps & triceps
6
Q
Motor unit
A
Single motor neuron together with all muscle fibers it stimulates
7
Q
Exoskeleton
A
Hard protective skeleton made of chitin on the outside of the body
8
Q
Endoskeleton
A
Skeleton made of bone and cartilage found inside the body
9
Q
Joints
A
site of junction of 2+ bones
10
Q
Synovial joints
A
Joints with a synovial fluid filled cavity -> lubricates joint & prevents friction
