Elasticity is the ability of an object or substance to return quickly to its original shape and size after being bent‚ stretched‚ or squashed. When an elastic material is deformed due to an external force‚ it experiences internal forces that oppose the deformation and restore it to its original state if the external force is no longer applied. There are various elastic moduli‚ such as Young’s modulus‚ the shear modulus‚ and the bulk modulus‚ all of which are measures of the inherent stiffness of
Premium Elasticity
fiber contraction by binding to troponin. Troponin is a globular protein complex which is attached to the actin filament and tropomyosin. The tropomyosin will be changed its shape and pulled away from the myosin-binding sites on the actin filament when more troponins present. This permits myosin to form cross bridges with actin filaments of the sarcomere and produce the movement associated with the contraction. As cross bridges formed increase‚ the contraction becomes stronger. As a result‚ more respond
Premium Muscle Nerve Energy
contractions‚ myofilaments are successful in their sliding movements‚ the muscle shortens‚ and movement occurs. Contractions in which the muscles do not shorten are called isometric contractions (“same measurement” or length). In isometric contractions‚ the myosin mysofilaments are “skidding their wheels‚” and the twnaion in the muscle keeps increasing. 9. Muscle tone is a state of continuous partial contractions. Muscle tone is the result of different motor units‚ which are scattered through the muscle
Premium
Bio-111 Laboratory #8 Mitosis and Meiosis 17 November 2010 Part1-Questions: a) Explain mitosis Mitosis is a process of asexual reproduction in eukaryotic cells. This process is divided into five stages: prophase‚ metaphase‚ anaphase‚ telophase and cytokinesis. A diploid cell duplicates its genetic information. Therefore the two diploid daughter cells will receive an exact copy of the genetic material. Explain meiosis Meiosis is a two round cell division process where a diploid cell divides
Premium Mitosis Cell cycle Cell
experienced by each muscle fiber due to the extra blood load entering the heart. The stretching of the muscle fibers augments cardiac muscle contraction by increasing the affinity of troponin C for calcium[citation needed]‚ causing a greater number of actin-myosin cross-bridges to form within the muscle fibers. The force that any single cardiac muscle fiber generates is proportional to the initial sarcomere length (known as preload)‚ and the stretch on the individual fibers is related to the End Diastolic Volume
Premium Cardiology Cardiac muscle Heart
oxidative metabolism. The effects on cardiac tissue‚ which are covered extensively elsewhere‚ include an increase in cardiac output due to increase in heart rate and myocardial contractility‚ which are directly related to an increased synthesis of myosin‚ β1-adrenergic receptors‚ and Ca2+ ATPase.
Premium Metabolism Protein Thyroid hormone
`ANP 1105 B – Human Anatomy and Physiology I Contents 1. Structural Organization of the Human Body (2 Lectures) 1.3.1 Tissues Tissue: groups of structurally similar cells that have perform common/related function Tissues cooperate within an organ for function of organ as a whole‚ different issues = division of labor 1.3.2 4 Types of Tissue: 1. Muscle Tissue: movement 2. Epithelial Tissue: covering 3. Nervous Tissue: control (regulation)
Premium Action potential Neuron
the Blood vessels and nerves of skeletal muscle tissue. -Understand the difference between a myoblast and Satellite cells -Understand the difference between Sarcolemma and T-tubules -Know the difference between thick and thin filaments (actin vs. myosin) -Know all the components of a sarcomere ( each band‚ zone‚ & line) -Understand the neuromuscular junction and the components of the neuromuscular junction (synaptic knob‚ motor end plate‚ synaptic cleft) -Know what happens at each physiological
Premium Muscle Skeletal muscle Muscle contraction
general‚ proteins may be structural proteins used to build tissues‚ they may be enzymes that mediate chemical reactions‚ or they may be hormones. Examples of proteins would be channel proteins in cell membranes‚ collagen protein in the skin‚ actin and myosin in the muscles‚ and hemoglobin in red blood cells. Types of dietary sources would be‚ meat‚ milk‚ (both of which are not pure proteins‚ but are good sources of protein)‚ eggs‚ grains and beans. Carbohydrates - Complex carbohydrates are chains
Premium Protein Metabolism Nutrition
The sarcomere is considered to be the contractile unit of muscle. –TRUE A motor unit is a motor neuron and all the muscle cells that it innervates and causes to contract. –TRUE When a sarcomere contracts‚ the myosin filaments slide over the actin filaments bringing the myosin filaments closer together. –FALSE During muscle contraction‚ when calcium ions bind to TROPONIN‚ the binding site on actin filaments is uncovered. The insertion of a muscle is that end which during the contraction
Premium Meiosis Reproductive system Chromosome