MUSCULAR SYSTEM

• Vanesha Ranili, PT, is a student in the College of Rehabilitative Sciences Department of Physical Therapy.
• The muscular system consists of root words such as bucc/electro/ofa/fibro/o, which are used to check electricalicity, connective tissue, and muscle tone.
• Enzyme acylcholineesterase breaks down acetylcholine into acetic acid and choline.
• Torre's Principles of Anatomy and Physiology, 15th Edition, was authored by G. Joseph, B.H. Derrickson, and D.W. Wilson.
• Muscle contraction occurs because myosin heads attach to actin at both ends, progressively pulling the actin towards the midline.
• The actin slides inward along the myosin filament mechanism.
• Molecules of ATP are produced in muscle contraction.
• Stabilizing body positions involves storing and moving substances within the body.
• Meaning of check in muscular system is to smooth or normalize, difficult with many pain weaknesses.
• Torre's Principles of Anatomy and Physiology, 15th Edition, is a comprehensive textbook for undergraduate students.
• The 15th Edition of Torre's Principles of Anatomy and Physiology was published by Elsevier in 2017.
• Generating heat properties of muscular tissue involves storing and moving substances within the body.
• The term "bradycard" is used to describe a slow heartbeat.
• Excitability is a property of the nervous system that involves storing and moving substances within the body.
• The relative ratio of type I IB and type I fibers in each muscle is genetically determined and helps account for individual differences in physical performance.
• Extensibility is a property of the nervous system that involves storing and moving substances within the body.
• Contrailability is a property of the nervous system that involves storing and moving substances within the body.
• Slow oxidative (SO) muscle fibers increase in number between 50 and 80.
• Fibers can be classified as fast glycolytic fibers, fast oxidative glycolytic fibers, or fast oxidative fibers.
• Muscle tone in contraction remains constant while the muscle changes its length.
• Tension is generated while the muscle does not change its length.
• The relative ratio of type I and type II fibers in each muscle is genetically determined and helps account for individual differences in physical performance.
• The term "dystonia" is used to describe a condition where muscles contract involuntarily.
• Muscles become weaker, reflexes slow down, and flexibility increases.
• The mesodermal cells gradually lose muscle mass between 30 and 50, often due to reduced physical activity.
• Smooth muscle develops from mesodermal cells that migrate and evolve into the developing gastrointestinal tract, forming myotome scleratome dermatome.
• Cardiac muscle originates from mesodermal cells that migrate and develop into the heart, forming endocardial heart tubes.
• Exercise, including both aerobic and strength training, can help at any age.
• Noticeable strength decline usually starts around age 60.
• Lower limb muscles weaken before upper limb muscles.
• Somites differ in three regions: the head, neck, and limbs.
• The term "myoma" is used to describe a benign tumor of the uterus.
• Except for certain specific muscles (iris and arrector pili muscles), all body muscles originate from mesoderm.
• The first pair of somites appears around the 20th day of embryonic development, and the number of somites correlates with the embryo's approximate age.
• These mesodermal columns undergo genetic atrophy, forming cuboidal structures known as somites.
• Hypertrophy and hyperplasia are two different processes that occur during muscle development.
• Somites give rise to skeletal muscles in the head, neck, and limbs.
• Somites develop into the vertebrae during embryonic development.
• The size of the muscle cell increases during embryonic development, leading to an increase in the number of muscle fibers.
• During embryonic development, mesoderm forms dense columns along the developing nervous system.