Lab #3: Isotonic contraction and the effect of load on skeletal muscles Abstract The job of the motor nervous system is to control certain elements in muscles simultaneously to ultimately produce movement. Movement of the body is the result of specialized cells directly associated with skeletal muscle. Skeletal muscles are voluntary muscle and must contract before movement can occur. We know the muscle team moving the arm is formed at the biceps and triceps. Biceps can bend the elbow‚ but
Premium Muscular system Skeletal muscle Muscle
LABORATORY REPORT (Click on the Save a Copy button on the panel above to save your report) Activity: Name: Instructor: Date: Twitch Contractions and Summation Katrelle Bond Rachel Waite November 7‚ 2014 Predictions Effect of Muscle Fiber Length on Contraction 1. As muscle fiber length increases contraction force increases. Effect of Stimulation Frequency on Contraction 2. As the frequency of stimulation increases‚ the force of contraction: increases. Materials and Methods Measurement of Threshold
Premium Muscle Neuron Muscle contraction
Muscles are responsible for all conscious and unconscious movement. It is how we move and react to an environment. There are three types of muscles in the body include the skeletal muscle‚ smooth muscle‚ and the cardiac muscle. Whether you are running‚ walking‚ breathing‚ eating‚ sleeping‚ or typing it all involves some sort of muscle action. Muscle cells that shape‚ form‚ and outline the whole human skeleton is called a muscle fibers. There are two types of muscle fibers: Type I (slow-twitching
Premium Muscle Muscular system Cardiac muscle
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
2/14/2012 Anatomy and Physiology Muscle Grip Strength Lab Report Introduction: Skeletal muscle is a form of striated muscle tissue existing under the voluntary control of the somatic nervous system (Medscape 1). Skeletal muscle is part of the three big muscle types‚ it is connected to bones by tendons (Medscape 1). Muscle grip strength is significant to an individual because it helps the person know the ability of muscle power and force that they have in their
Premium Muscle Muscular system Myosin
Physiological Effects of Steroids and Steroid Abuse Competition in sports is absolutely incredible. Some athletes go as far as using drugs illegally such as anabolic steroids‚ a synthetic derivative of the male hormone testosterone. However‚ major sports bodies like the Olympics‚ the NBA‚ the NFL‚ and the NHL ban the use of such substances. For this reason‚ it is helpful to know the physiological effects of steroids as well as negative consequences of steroid abuse. In their experiment‚ Anttila
Premium Testosterone Anabolic steroid Metabolism
E X E R C I S E 2 Skeletal Muscle Physiology O B J E C T I V E S 1. To define these terms used in describing muscle physiology: multiple motor unit summation‚ maximal stimulus‚ treppe‚ wave summation‚ and tetanus. 2. To identify two ways that the mode of stimulation can affect muscle force production. 3. To plot a graph relating stimulus strength and twitch force to illustrate graded muscle response. 4. To explain how slow‚ smooth‚ sustained contraction is possible in
Premium Muscle contraction Muscle Muscular system
As Jeff’s doctors diagnosed‚ Jeff’s condition is caused by a mutation of a sodium channel‚ SCNA4. The official name for Jeff’s condition is hyperkalemic periodic paralysis. Hyperkalemic periodic paralysis is a disorder that causes sudden onsets of extreme muscle weakness or paralysis (Hyperkalemic Periodic Paralysis). Hyperkalemic periodic paralysis is so rare that only around 1 in 200‚000 people (Hyperkalemic Periodic Paralysis). Also since hyperkalemic periodic paralysis is an inherited condition;
Premium Muscle Muscular system Cardiac muscle
Muscular dystrophy (MD) can be described as a group of diseases that cause continuing weakness and loss of muscle mass. (Article 1‚ pg.1) Muscular dystrophy effects homeostasis because abnormal genes (mutations) interrupts the production of proteins that the body needs to form healthy muscle. (Article 1‚ pg.1) The nine major forms of muscular dystrophy are Myotonic‚ Duchenne‚ Becker‚ Limb-girdle‚ Facioscapulohumeral‚ Congenital‚ Oculopharyngeal‚ Distal‚ and Emery-dreifuss. (Article 2‚ pg.1-2) The
Premium Muscular system Cardiac muscle Muscle
Muscles are all made of the same materials‚ a type of flexile tissue of thousands narrow tissues that make up all the muscles. There are three types of muscle tissue in the human body which are Cardiac‚ Smooth and Skeletal Muscles. Cardiac Muscles are muscles that conduct‚ forced‚ being completely in heart‚ responsible for pumping activity of heart‚ very heavy and solid. Smooth are non band‚ not under voluntary force found in comfortable organs of body accountable for growth like absorption of food
Premium Muscle Cardiac muscle Muscular system