PSIO Lecture 3.2

muscle

1.Bone

2.tendon

3. Epimysium 5. endomysium 6.muscle fiber covered in sarcolemma 7. myofibril

myofibril

left to right

thin filament, z-disc, i-band, h-zone , a-band, m-line

Three Units of Subcellular Organization

Control, Condition, Contraction

Control

sarcoplasmic reticulum

Condition

Sarcolemma, T-tubules

Contraction

Myofibrils, sarcolemma

Hyperplasia

gaining # of cells

Hypertrophy

cells growing in size

What does the intramuscular connective tissue do?

transmits force generated by muscle fibers so that it reaches the muscle tendon. spring like features

Fascia Components?

web like network, collagen and elastin, like liquid crystal, receptors (mechanco- and pain)

Dystrophin?

Connects thin filament to sarcolemma. Which sends signals for contraction

Troponin?

Holds trypomyosin in place during relaxed. and binds with calcium causes conformational change.

trypomyosin

covers myosin binding sites on actin when muscle is relaxed.