EXERCISE 2: Skeletal Muscle Physiology Student Name: Student ID#: Student instructions: Follow the step-by-step instructions for this exercise found in your lab manual and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Rename this document to include your first and last name prior to submitting‚ e.g. Exercise2_JohnSmith.doc. Please make sure that your answers are typed in RED. (You may delete these instructions
Premium Skeletal muscle Myosin Muscle
Most of our skeletal muscles are attached to bone on either end by tendons. As the muscles contract‚ they exert force on the bones. This force helps to support and move our body. Normally one end of the muscle is fixed in its position and the other end moves during contraction. The Origin is the attachment site that is stationary during contraction. The insertion is the site that does move when a muscle contracts. When we discuss the position of the Origin and insertion points‚ the insertion
Premium Muscle Bone Muscular system
how muscles contract‚ this is shown by the 5 stages of the sliding filament theory. When the muscle contracts‚ the myosin filaments attach themselves to similar actin filaments‚ this attachment causes formation in chemical bonds this then forms the cross bridges. Myosin and actin molecules are made in a series‚ this series is what makes up a muscle cell. This basic module is called the sarcomere‚ these are what gives the tissue of a skeletal muscle its appearance. The mechanism within muscle contraction
Premium Muscle Myosin Muscle contraction
Anatomy and Physiology Web-quest mucles and bones We live in our bodies. It is important that we understand how our bodies work so that we will be able to take good care of them while we are here on Earth in these spectacular containers!! Your body is covered by the largest organ and is supported within by foundation‚ your skeletal system. All your body systems have to work together in order to keep you alive and well. You will be exploring then parts of your body by using various web resources
Premium Anterior cruciate ligament Bone Ligament
Rehabilitation Muscle Physiology Physiological changes of training Testing - Evaluation Strength training concepts Return to function - Core Muscles Muscle Physiology Muscle Structure Fiber Type Muscle Contraction Energy Systems Force of Contraction Physiologic changes of training Skeletal Muscle Structure Motor Unit Mitochondria produce energy ATP Sarcolemma muscle fibers membrane Sarcomere contractile unit of skeletal muscle. Myofibril are
Premium Muscle Adenosine triphosphate Myosin
Skeletal Muscle Physiology: Frogs & Human Subjects (1‚ 2‚ 5-8‚ 10-12‚ 14-16) 1. There is a greatr concentration of Na+ f ; there is a greater concentration of K+ e . When the stimulus is delivered‚ the ermeability of the membrane at that point is changed; and c ‚ initiating the depolarization of the membrane. Almost as soon as the depolarization wave has begun‚ a repolarization wave follows it across the membrane. This occurs as b . Repolarization restores the h of the resting cell membrane
Premium Skeletal muscle Muscle Muscular system
REVIEW SHEET EXERCISE 2 Skeletal Muscle Physiology NAME: LAB TIME/DATE:9pm.. 4.8.11 Electrical Stimulation 1. Name each phase of a typical muscle twitch‚ and‚ on the following line‚ describe what is happening in each phase. a. Latent-stage from rest to muscle tension begins b. Contraction-At this stage the muscle reaches its peak in contraction c. Relaxation- muscle is shortened‚ returns to zero and back initial length. 2. In Activity 2‚ how long was the latent period? ___2
Premium Muscular system Muscle contraction Skeletal muscle
increases in voltage affect the amount of active force generated by the muscle? The force increased. What is the voltage beyond which there were no further increases in active force? Maximal voltage: ____8.5____ V Why is there a maximal voltage? What has happened to the muscle at this voltage? Keep in mind that the muscle we are working with consists of many individual muscle fibers. For the prevention of damage to the muscle. The muscle fibers cannot contract any further. An
Premium Muscle Skeletal muscle
Experiment 2: Skeletal Muscle ABSTRACT Frog skeletal muscle is used as an animal model to study muscle contraction. The objectives of this experiment is to demonstrate the physiological responses of skeletal muscle to electrical stimuli using frog gastrocnemius‚ to understand twitch‚ summation‚ tetanus and fatigue‚ to investigate the relationship between initial tension and force of contraction‚ to explore the differences between human and frog skeletal muscle. The threshold voltage is 0.4V. The
Premium Neuromuscular junction Skeletal muscle Acetylcholine
Introduction: In this lab‚ I will study how muscles contract‚ what makes muscles contract‚ different types of muscle contraction‚ and learn about how resistance affects muscle contraction. I will define Key Terms that describe what will occur in the experiments; I will conduct an experiment for each Activity and provide all resulting Data as well as answer Questions from each Activity. I will then provide a short Summary for what I learned in each Activity. Key Terms: Recruitment (or Multiple
Free Muscle Muscular system Muscle contraction