Q: Is muscle a soft tissue found in most animals? ¶
Q: Are muscles derived from paraxial mesoderm? ¶
Q: Was muscle found to have evolved independently from the skeletal and cardiac muscle types? ¶
Q: Are muscles exercised nightly during rapid eye movement sleep? ¶
Q: Is muscle the strongest? ¶
Q: Is muscle not under conscious control? ¶
Q: Is muscle the most important indicator of its role in the body? ¶
Q: Is muscle derived from the Latin musculus meaning "little mouse" perhaps because of the shape of certain muscles or because contracting muscles look like mice moving under the skin? ¶
Q: Are muscles arranged in regular, parallel bundles, cardiac muscle sarcomeres connect at branching, irregular angles? ¶
A: Yes, Striated muscle contracts and relaxes in short, intense bursts, whereas smooth muscle sustains longer or even near-permanent contractions.
Q: Are muscles predominantly powered by the oxidation of fats and carbohydrates? ¶
A: Yes, but anaerobic chemical reactions are also used, particularly by fast twitch fibers.
Q: Are muscles dependent on for structure and usage? ¶
A: Yes, and nonbilaterian muscles must be of a different origin with a different set regulatory and structural proteins.
Q: Is muscle arranged in discrete muscles, an example of which is the biceps brachii? ¶
A: Yes, The tough, fibrous epimysium of skeletal muscle is both connected to and continuous with the tendons.
Q: Are muscles "striated" in that they contain sarcomeres that are packed into highly regular arrangements of bundles? ¶
A: Yes, the myofibrils of smooth muscle cells are not arranged in sarcomeres and so are not striated.
Q: Are muscles used at well below their maximal contraction strength for long periods of time? ¶
A: Yes, Aerobic events, which rely primarily on the aerobic system, use a higher percentage of Type I muscle fibers, consume a mixture of fat, protein and carbohydrates for energy, consume large amounts of oxygen and produce little lactic acid.
Q: Is muscle myofibrils? ¶
A: Yes, and which themselves are bundles of protein filaments.
Q: Is muscle typically branched to form a network? ¶
Q: Are muscles usually found where their length change is less important than maximum force? ¶
A: Yes, such as the rectus femoris.
Q: Are muscles muscle spindles that provide sensory feedback information to the central nervous system? ¶
Q: Are muscles sheathed by a tough layer of connective tissue called the epimysium? ¶
Q: Are muscles those with the largest cross-sectional area? ¶