One of the most essential parts of the cardiovascular system‚ the heart pumps the blood throughout the body transporting oxygen and nutrients to cells. The heart is a very complex organ that consists of “four cavities‚ or open spaces‚ inside the heart that fill with blood. Two of these cavities are called atria
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of our muscles are that they respond to stimuli‚ they are able to shorten in length‚ they stretch when they are pulled and they tend to return to their original shape after contracting or extending them. Muscle contractions occur when our nervous system sends a signal via the neuromuscular junctions the signal arrives at the end bulb‚ the vesicles release acetylcholine and diffuse across the neuromuscular cleft. The transmitter molecules fill receptor sites in the membrane of the muscle and increase
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voluntary. They are found in muscles that maintain low-intensity contractions for long periods without fatigue. A single skeletal muscle cell is referred to as a muscle fibre. There are three types of muscle fibres found in the human skeletal muscle system including slow-oxidative fibres‚ fast-oxidative fibres and fast-glycolytic fibres. These three fibres are each defined by their biochemical capacities1. The slow-oxidative muscle fibres are classified by their slow speed of contraction and oxidative
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(those which are gases)‚ muscle metabolism increases‚ and a series of signs and symptoms appear‚ which if left untreated can lead to death. The earliest findings are an increased production of carbon dioxide and signs of increases sympathetic nervous system activity. Malignant Hyperthermia is typically a life threatening disease‚ also referred to as a syndrome‚ which occurs when a person with Malignant Hyperthermia susceptibility trait is exposed to triggering factors‚ which include most inhalational
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1) What is the role of calcium ions during contraction of a skeletal muscle? Calcium is an important element for live. Calcium is found in the bones of animals and humans. In muscle contraction is produce as a result of Calcium ions ‚ Ca2+‚ It comes from rapid release from the cisternae of the sarcoplasmic reticulum which cause a chemical reaction between ATP and the myofilaments. Another important function of Calcium ions occurs during the state of resting muscle. During the state of resting
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Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor
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This sensory neuron then relays this information to the central nervous system where afferent neurons synapse with interneurons which in turn synapse with efferent or motor neurons. This motor neuron then relays the information out of the brain to an effector. In this case‚ the effector is a skeletal muscle that causes the reflex
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The ileum and spine protect the digestive and urogential system and the hip. The patella protects the knee and the carpals and the tarsal’s protect the wrist and the ankle. Movement: Joints between bones allow movement. Bones connect to bones with ligaments. Muscles connect to bones with tendons. Movement is powered by skeletal muscles which are attached to the skeleton at various sites on bones and are coordinated by the nervous system. A muscle function is to produce force and motion and movement
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Ergogenic aids are substances or devices that enhance energy production‚ for use for recovery and provide athletes with a competitive advantage. Numerous ergogenic aids claim to enhance sports performance and are used by amateur and professional athletes. Approximately 50 percent of the general population has reported taking some form of dietary supplements‚ while 76 to 100 percent of athletes in some sports are reported to use them. Physicians can evaluate these products by examining four factors
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Bio 201: Human Anatomy and Physiology I Muscle Physiology Protocol I. Goals for this lab A. To increase your understanding of muscle physiology - tonus‚ motor unit recruitment and fatigue. B. Learn how to conduct and analyze an EMG (electromyogram) C. To gain more experience with the scientific method‚ experimental design‚ making predictions‚ critical analysis of results‚ and interpretation of your results. II. Introduction Human skeletal muscle consists of hundreds of individual
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