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BIO 169 Muscles-PHYS
ANAT & PHSIOLOGY II-MUSCLES-PHYSIOLOGY
| Question | Answer |
|---|---|
| surrounds each individual fiber | Endomysium |
| surrounds a group of fibers (fascicle) | Perimysium |
| surrounds an entire muscle, is continuous with tendon. | Epimysium |
| a short section of a myofibril, and is the smallest contractile unit of a muscle fiber | sarcomere |
| bundles of the contractile proteins actin & myosin | Myofilaments |
| repeating A & I bands along the myofibril | Striations |
| Types of Muscle Tissue: voluntarily controlled, attaches to skeleton | SKELETAL |
| Types of Muscle Tissue: involuntarily controlled, only in the heart | CARDIAC |
| Types of Muscle Tissue: Nonstriated, involuntarily controlled, lines internal passageways | SMOOTH |
| Muscle Functions | Body movement,Posture, body position Movement & storage of materials Heat generation |
| Composed of the protein myosin, Anchored by the M line of the sarcomere, do not move during contraction | Thick filaments |
| Thin filaments ARE Composed of the ______ _____ ______ | protein actin, tropomyosin, and troponin |
| Wraps around each myofibril, Stores calcium and releases it into the sarcoplasm when the muscle is stimulated by a motor neuron | Sarcoplasmic Reticulum |
| Passageways that penetrate into the interior of the muscle fiber.Conducts action potentials from the sarcolemma into the deepest parts of the muscle cell | T tubules |