Anatomy and Cell Biology 3309 Lecture Notes - Lecture 5: Myoglobin, Replantation, Electron Microscope

24 views8 pages

Document Summary

Objectives: relate the ultrastructure of skeletal muscle to its structure, describe the mechanism of contraction, compare different muscle fiber types and their ultrastructural differences. Identify features of skeletal muscle in cross-sections and longitudinal sections. Skeletal muscle: striated, voluntary movement, peripheral nuclei, multinucleated, cardiac muscle, striated, involuntary movement, central nuclei, 1 or 2 nuclei, intercalated disks. Smooth muscle: no striations, involuntary movement, central nuclei, uninucleated. Epimysium, perimysium and endomysium come together to form the tendon at the end of the muscle that attaches to the bone. Slow oxidative fibers (type i: slow twitch, oxidative, fatigue resistant, mitochondria rich, appears red, as they contain myoglobin. Fast glycolytic fibers (type ii: fast twitch, glycolytic, white muscle, anaerobic, mitochondria poor, appears white. Clinical case: motor neuron disease: denervation of muscle fibers causes atrophy. Adjacent motor neurons can sprout processes that reinnervate muscle fibers. This causes cell type grouping: separation of motor fibers.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents

Related Questions