Muscles
Across
- 4. layer of connective tissue that closely surrounds a skeletal muscle
- 8. composed of thin actin filaments held by direct attachments to structures called Z lines, which appear in the center
- 11. is a molecule that has 3 protein subunits and are attached to actin
- 12. membraneous channels extend into the sarcoplasm as invagination's continuous with the sarcolemma
- 14. thin filaments of a muscle fiber
- 15. composed of thick myosin filaments overlapping thin actin filaments
- 16. any of the elongated contractile threads found in striated muscle cells
- 18. a muscle which is connected to the skeleton to form part of the mechanical system which moves the limbs and other parts of the body
- 19. each muscle fiber within a fascicle lies within a layer of connective tissue in the form of a thin covering called this
Down
- 1. the synapse where a motor neuron axon and a skeletal muscle fiber meet
- 2. center of a sarcomere where myosin can bind
- 3. neurotransmitter that motor neurons use to control skeletal muscle contraction
- 5. thick filaments of a muscle fiber
- 6. corresponds to the endoplasmic reticulum of other cells
- 7. the fine transparent tubular sheath which envelops the fibers of skeletal muscles
- 9. layer of connective tissue that extends inward from the epimysium and separates the muscle tissue into small sections
- 10. a band or bundle of fibrous tissue in a human or animal body that has the ability to contract, producing movement in or maintaining the position of parts of the body
- 12. a flexible but inelastic cord of strong fibrous collagen tissue attaching a muscle to a bone
- 13. striated repeating pattern of units
- 17. neighboring parallel lines that define the sarcomere