Muscle Action Research Paper

Words: 520

Pages: 3

Open Document

Initiation of a Muscle Action

Before a muscle cells can act, it must receive an action potential from a motor neuron. After the sarcolemma of the muscle cell receives the action potential, the electrical impulse travels inward through the transverse tubules and sarcoplasmic reticulum. This electrical charge causes the sarcoplasmic reticulum to quickly release calcium ions into the sarcoplasm. While in a resting state, the tropomyosin protein strands are covering the binding sites on the actin filaments, thus preventing any action-myosin interaction. However, once the calcium ions are released from the sarcoplasmic reticulum they bind with troponin, which has a strong affinity for calcium ions. Troponin, which lies on top of the tropomyosin, then initiates a molecular process of shifting the tropomyosin molecules off the binding sites (on the actin). The myosin cross-bridges can now attach to the binding sites on the actin filaments. …show more content…
This causes the actin filaments to slide over (or be pulled over) the myosin protein and muscle shortening to occur. Present on the globular heads of the myosin cross-bridges is the enzyme ATPase, which speeds up the splitting of ATP to yield adenosine diphosphate (ADP), inorganic phosphate (P), and energy. Adenosine triphosphate is the energy molecule for all muscle actions. Immediately after the power stroke, the myosin cross-bridges detach from their receptor site and rotate back to their original positions. Adenosine triphosphate provides the energy required for the dissociation of actin and myosin. Following this detachment of the cross-bridges, hydrolysis (or splitting) of ATP can reoccur,

Essay On Stem Cell Therapy

Stem cell therapy regenerates heart muscle damaged from heart attacks in primates University of Washington April 30, 2014 Heart cells created from human embryonic stem cells successfully restored damaged heart muscles in monkeys. The results of the experiment appear in the April 30 advanced online edition of the journal Nature in a paper titled, "Human embryonic-stem cell derived cardiomyocytes regenerate non-human primate hearts." The findings suggest that the approach should be feasible…

Words 1010 - Pages 5

Baroreceptors

with the minimum stimulus to activate a receptor, this causes the mechanoreceptors on your skin to fire, or specifically your baroreceptors. Once these receptors have received a signal this changes the membrane potential of the cell and causes an action potential. Due to modality and location the brain interprets a signal coming from your back as a touch and coming from that certain location. The reason your friend and yourself did not interpret the same stimulus will be due to the…

Words 1780 - Pages 8

Case Study Of Paper Hawks

uuuuuuu- uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuMy paper deadline was fast approaching and I wasn't sure if I was ready to submit my paper. Things seemed totally out of control until I discovered Paper Hawks which helped me with the editing of academic assignment. The result I got was amazingly surprising. I have never been able to submit a paper that was 100% flawless in terms of grammar and paper format. It's all because of Paper Hawks. Highly recommended!It's more like a personal teacher…

Words 1026 - Pages 5

anat terms Essay

Research Writing Research Process Organization Citing References Writing Process View All Research Writing Articles The Anatomy of a Research Paper A research paper encompasses many things. It may be a paper due at the end of a term or class. It may be the result of weeks, months or years of research. During the course of completing this type of academic writing assignment, you examine an issue to write an analytical or argumentative paper that is a summary of research and your conclusions…

Words 8587 - Pages 35

Essay on Endocrine System and Bibliography Lists

and that each is critical in the passage of information between cells. Bibliography lists 7 sources. Schwannc.wps The Structure Of Muscle Tissue In Red Vs. White Meat : A 6 page examination of the differences between red and white meat. Emphasizes differences in muscular structure and in the relative presence of iron. Discusses striated and smooth muscle tissue as well as myoglobin and its function in the physiology of animals particularly in the supply and transport of oxygen. Bibliography…

Words 589 - Pages 3

Hodgkin And Huxley's Study

five consecutive papers that explained how the movement of ions in a nerve cell occur during an action potential. The first paper examined the function of the neuron membrane under normal conditions and outlined the basic experimental method universal to each of their subsequent studies. The second paper examined the effects of changes in sodium concentration on the action potential as well as the resolution of the ionic current into sodium and potassium currents. The third paper examined the effect…

Words 779 - Pages 4

Massage and Head Massage Mediums Essay

April 2012 Task Complete all questions in outcomes 4-7, 10-12 Attempt all questions in BLACK Questions in BLUE (Outcomes 8 & 9) are found in the mandatory written papers, and are optional, however, may need to be attempted at a later date You can use any method of research that you feel appropriate, however, you must be able to prove that this is your own work. All parts of each outcome must be answered using a standard blue or black ink, or word processed if you…

Words 2374 - Pages 10

lectureNotes 2 Essay

Minnesota Version: July, 2011 Table of Contents 1 Muscle Contraction: cardiac, smooth and skeletal_________________________ 3 2 The Neuromuscular Junction ________________________________________ 13 3 Membrane Resting Potential _________________________________________ 21 4 NMJ References ___________________________________________________ 29 5 Readings _________________________________________________________ 31 NMJ Lecture Notes 1 1 Muscle Contraction: cardiac, smooth and skeletal 1.…

Words 7850 - Pages 32

Stress Management Essay

as events or situations that cause them to feel tension, pressure, or negative emotions such as anxiety and anger. Others view stress as the response to these situations. This response includes physiological changes-such as increased heart rate and muscle tension-as well as emotional and behavioral changes. However, most psychologists regard stress as a process involving a person's interpretation and response to a threatening event. Stress is a common experience, and there are many different things…

Words 1506 - Pages 7

Essay about Actions of Drugs

Actions of drugs on cardiovascular preparations Introducion The experiment outlined in this report was carried out with the intention to observe and explore the effects of certain named drugs on a vascular preparation, in the cardiac region specifically. The cardiovascular preparation used in this experiment was an isolation of the descending aorta of a rat. This isolate is particularly useful as it mirrors the responses that would be observed in a human sample, thus this experiment will give…

Words 2075 - Pages 9