week 11: locomotion Flashcards
what do muscles rely on to create motion
contractile fibers
what are three types of muscle
skeletal
smooth
cardiac
what is a striated muscle
a bundle of long fibers where each fiber is a bundle of smaller myofibrils arranged longitudinally
what is a sarcomere
the functional unit of a muscle, also known a z lines
what is the name of the model that suggests that the thin and thick filaments slide past each other longitudinally powered by myosin
sliding filament model
what prevents actin and myosin from interacting
tropomyosin and the troponin complex bind to the actin strands when the muscle is at rest.
what stimulus leads to the contraction of a muscle
action potential in a motor neuron
what bacteria causes tetanus
clostridium tetani
what disorder is caused by the bacteria clostridium tetani
tetanus
what type of muscle has more myoglobin
slow twitch or fast twitch
slow twitch
where is smooth muscle found
digestive tract
what type of muscle consists of striated cells electrically connected by intercalated disks
cardiac muscle
what is an endoskeleton
internal skeleton buried in soft tissue
what are five functions of the skeleton
- Support and protection for the body.
- Locomotion (in concert with muscles).
- Produce blood cells in bone marrow.
- Store calcium and phosphorous.
- Store energy in yellow marrow.
what are the three types of bone cells
osteocytes
osteoblasts
osteoclasts
