Biology 107
Lecture Notes: Movement and Locomotion.
Reading:
Chapter 49, Pages 1075-1086 in text.
Movement and Locomotion
- Skeletons
support and protect the body and are essential for movement
- Muscles
move skeletal parts by contracting
- Structure
and function of vertebrate skeletal muscle
- Interactions
between myosin and actin underlie muscle contractions
- the
sliding filament model
- Calcium
ions and regulatory proteins control muscle contraction
- Skeletal
muscles contract when stimulated by motor neurons
- Muscle
is remodeled to match function
- Diverse
body movements require variation in muscle activity
- Fast
and slow muscle fibers
- Invertebrates
have muscles similar to the skeletal and smooth muscles of vertebrates,
but with some interesting adaptations