Skeletal Muscle Lab Report

Contractility of ASM requires an increased levels of intracellular Ca2+. When surface receptors are not activated, Ca2+ levels are low. Upon activation of these cell surface receptors by contractile agonists e.g. acetylcholine, serotonin and histamine, intracellular Ca2+ increases causing a contraction (9). Smooth muscle cell contraction is controlled by both receptor and mechanical activation of proteins actin and myosin and also changes to membrane potential.

Skeletal Muscle Structure.The cells of skeletal muscles are long fiber-like structures. They contain many nuclei and are subdivided into smaller structures called myofibrils. Myofibrils are composed of 2 kinds of myofilaments. The thin filaments are made of 2 strands of the protein actin and one strand of a regulatory protein coiled together. The thick filaments are staggered arrays of myosin molecules.

Smooth muscle is one of three muscle fiber types found in animals. Unlike skeletal and cardiac muscle cells, smooth muscle cells are not striated, and have single nuclei. Smooth muscles are typically under control of the autonomic nervous system, and do not contract voluntarily. Smooth muscle contracts slowly,

types of muscle tissues : skeletal, cardiac, smooth. Each of these different tissues has the ability

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Biceps Brachii - It's attachments are the coracoid process, supraglenoid tuberosity, and radial tuberosity. When it contracts it causes flexion and supination. It's located close to the endangerment site the antecubital. This area is known for housing chronic pain.

These muscle tissue cells specialised to contract and move parts of the body. It is also capable of responding to stimuli. There are three types of muscle in the body such as: skeletal, cardiac and smooth. Each muscle is created of muscle fibers that are capable of contracting and returning back to original state-relaxation. Contraction causes movement of the skeleton, soft tissue, blood or specific material. Skeletal muscle is attached to the bones of the skeleton. Some facial muscles are attached to the skin. They have direct control over them through nervous impulses from our brain sending messages to the muscle. Contractions can vary to produce fast, powerful movements. These muscles also have the ability to stretch and contract to return to original shape. Cardiac muscles are found in the chambers of the heart such as the atria and ventricles. It is under the control of the automatic nervous system; however, even without nervous input contractions can occur. It is completely different to all the other muscles. Smooth muscles are also known as involuntary due to our inability to control its movement. This muscle is usually found in the walls of hollow organs

Abstract: In this experiment the measurements of skeletal muscle fibers of the rabbit are in millimeters. The average length for the three muscle fibers after adding the solution A which contained only 0.25% ATP in distilled water was 20 mm. The average length for the three muscle fibers after adding the solution C which contained 0.5M KCl and 0.001M MgCl2 in distilled water was 1.77 mm and the average length for the three muscle fibers after adding the solution B which contained 0.25 % ATP and 0.5 M KCl with 0.001 M Mgcl2 in water was 1.77 mm.

Catabolism is the set of metabolic pathways that breaks down molecules into smaller units to release energy. In catabolism, large molecules such as lipids, nucleic acids and proteins are broken down into smaller units such as fatty acids and amino acids. When food is broken down energy is released as the foods molecules’ bonds are broken. Then this energy is used to reform the bonds that have been broken so that ATP can be recreated. More energy can be obtained when oxygen is present and the process proceeds on aerobically. The aerobic production of ATP occurs inside the mitochondria in cells. The broken down food molecules then enters the blood stream. Blood is a liquid connective tissue as it is made up of red and white living cells. Oxygen is transported in the red blood cells which are attached to a protein called haemoglobin. Nutrients including glucose are dissolved in the plasma. Plasma is a mixture of water, sugar, fat, proteins and salts. The main function of the plasma is to transport blood cells throughout your body along with nutrients, waste products, antibodies, clotting proteins and chemical messengers such as hormones that help maintain the body’s fluid balance. The red blood cells also carry iron which attracts oxygen. Our cells use oxygen to make energy. Iron is also needed to keep the immune system healthy and help brain cells. Without your heart, blood vessels and blood you wouldn’t be able to get the

Muscle tissue - Muscle cells are the contractive tissue of body that produce force and cause motion within internal organs. Muscle tissue is separated into three different categories: visceral or smooth muscle that are located in the inner linings of organs and skeletal

The purpose of this lab was to better understand the human body by doing various activities and observing the three different muscle types. The activities were not conducted in order, but we did follow the instructions of each activity. However, there could be deviation since Vivian had allergies and I was sort of sick as well so our result may not be as accurate. By conduction the activities, we were able to analyze the different receptors in the skin and sense—for instance understanding the differences in receptors or taste and smell. Also, we were able to differentiate the three muscle types and observe the striation of the cardiac and skeletal muscle—and observe other differences in muscle types. By noticing that, for instance the tongue has different regions for different taste, we were able to infer that some taste are more important to distinguish than others. Also, by observing the different types of muscle, we were able to discuss the different functions and why the cardiac and skeletal muscle have striation. Lastly, it is important to understand the human body, not

Introduction: Exercise is a physical activity or particular movement that is used in order to become healthier and stronger. (1) Exercise, in all of its forms, has various effects on the different systems in the human body. One of the main benefits is cardiovascular health, including circulation and heart health. Exercise uses a lot of energy, which the cells derive from oxidising glucose. Meaning that the heart has to work harder to pump more blood throughout the body and the heart has to beat faster in order to achieve a high effort. (2) The heart benefits from exercise include being able to pump more blood through the body and continue working at a higher level with less strain. (3)

Smooth muscles are found in the skin, internal organs, reproductive system, major blood vessels, and excretory system. Skeletal muscles are composed of long fibers surrounded by a membranous sheath, the sarcolemma. Since the Skeletal muscles are under control by whom ever they belong to are called voluntary muscles. This muscle is attached to two or more bones which are then attached to the skeleton by tendons. For example, head and neck muscles; contraction of these muscles produces facial expressions and head movements. They are also responsible for speech and swallowing. Skeletal muscles are the main muscles which move your body. Muscles nearly always work in coordinated groups; contraction of one muscle is accompanied by relaxation of another, while other muscles stabilize nearby joints. Then the last of the muscle types is the Cardiac Muscle or the involuntary muscles. Cardiac muscles are not under conscious control they do not react by a persons decision or movement. and are connected to the nervous system which are stimulated by autonomic impulses. Cardiac muscles are found in your internal organs like the heart or the intestine. For example; they include muscles that propel food through the intestine and those that control sweating and blood pressure.

The skeletal muscles are one of three major muscles types. As the name implies, these muscles are attached to bones by bundles o collagen fibers that are known as tendons. Skeletal muscles are made up of individual components that are known as muscle cells. These muscles have the appearance of long cylinders. The basic function is responsible for skeletal muscles to

The solid framework is the body's system of tissues that controls development both of the body and inside it, (for example, the heart's pumping activity and the development of nourishment through the gut). Development is created through the constriction and unwinding of particular muscles.