Muscles

Question 1

Titin

Answer 1

• biggest polypeptide, elastic
• connects myosin to Z line, stabilizes myosin, prevents Z line from sliding too far apart, recoil

Question 2

Antagonistic pairs

Answer 2

Opposite movements

Question 3

Neuromuscular junction

Answer 3

Motor neuron meets muscle fiber

Question 4

Acetylcholine

Answer 4

Neurotransmitter - contraction

Question 5

Motor unit

Answer 5

Motor neuron + muscle fibers connected to it

Question 6

Functions of the skeleton - muscles

Answer 6

Provide anchorage points - one moves VS one doesn’t
Fulcrum - joint, pivot point for lever

Question 7

Synovial joint - structure

Answer 7

Ligament - bone to bone
Tendon - muscle to bone
Cartilage
Synovial capsule and fluid - reduce friction

Question 8

Motion of joints

Answer 8

Hinge joint - limited, stable
Ball and socket joint - rotation, abduction, abduction, protraction, retraction

Question 9

Intercostal muscles

Answer 9

In between ribs
External - expansion VS Internal - inward movement of diaphragm

Question 10

Troponin

Answer 10

Binds with Ca2+ to expose actins active site, protein that regulates muscle contraction