FROG MUSCLE PHYSIOLOGY 2) What was the smallest voltage required to produce max contraction? What proportion of the muscle fibers in the muscle do you think were contracting to produce this maximal response? Muscle fibers act in response to isolated stimuli in an all or none fashion. However‚ a muscle organ‚ such as the gastrocnemius muscle‚ is composed of many individual muscle fibers. It is known that all of the fibers in a muscle do not have the same threshold and that a stimulus applied to
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CHAPTER 1 Coagulation Pathway and Physiology Jerry B. Lefkowitz‚ MD Introduction Our understanding of blood clotting is intimately tied to the history of civilization. With the advent of writing 5000 years ago‚ it could be argued that the first symbols used for blood‚ bleeding‚ or clotting represented the first published coagulation pathway. The ancient peoples of the world always held blood in utmost mystical esteem. Through the ages‚ this esteem has been transmitted to modern times in the
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Lab Report: Exercise 5: Cardiovascular Physiology Type the answers to the following questions into the document. Save the file as YourLastName_Ex5LabReport.rtf and submit for grading via the associated assignment link. Activity 1: Heart Sounds 1. What is the cardiac cycle? The cardiac cycle is one complete heart beat. During the cycle each atrium and ventricle will contract and relax once. THe contraction of the chamber is called systole and the relaxation is called diastole. The average
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Laboratory – Muscle Physiology A. MUSCLE TONUS Observations‚ Report and Conclusion: A. Define muscle tonus and give its importance * Muscle tonus refers to a state of slight muscular contraction maintained by synchronous impulses of low frequency‚ discharged by the spinal motor neurons. * Reflex in nature. * Muscle tonus is a small amount of tension in the muscle due to weak‚ involuntary contractions of its motor units. Muscle tonus is important in a sense that it governs the
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The Physiology and Pathophysiology of the Skin Abstract The 5-HT3 receptor is a ligand-gated cation channel located in the central and peripheral nervous system; it has also been detected on a variety of other cells. In the periphery‚ it is found on autonomic neurons and on neurons of the sensory and enteric nervous system. In the CNS‚ the 5-HT3 receptor has been localized in the area postrema‚ nucleus tractus solitarii‚ nucleus vaudatus‚ nucleus accumbens‚ amygdala‚ hippocampus‚ entorhinal‚
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Shier‚ Butler‚ and Lewis: Hole’s Human Anatomy and Physiology‚ 13th ed. Chapter 7: Skeletal System Chapter 7: Skeletal System I. Introduction (Outcome 7.1.1) 1. Bones include active‚ living tissues: _____________________ __________________________________________________________________ (Outcome 7.1.2) 2. Bones: support and protect _________________‚ provide points of __________________________‚ house _________________‚ and store _____________________
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MALE REPRODUCTION MALE REPRODUCTIVE PHYSIOLOGY Testis - 2 compartments: interstitial tissue containing the Leydig cells that synthesize and secrete testosterone and the seminiferous tubules that produce spermatozoa and contain Sertoli cells Leydig cells and testosterone synthesis - Leydig cells mainly produce testosterone - T is a prohormone for synthesis of estradiol (vs. aromatase) and DHT (via. 5-alpha-reductase) - many effects of T are mediated via estradiol (esp in
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Anatomy and physiology of the brain and spinal cord The brain is a spongy organ made up of nerve and supportive tissues. It is located in the head and is protected by a bony covering called the skull. The base‚ or lower part‚ of the brain is connected to the spinal cord. Together‚ the brain and spinal cord are known as the central nervous system (CNS). The spinal cord contains nerves that send information to and from the brain. The CNS works with the peripheral nervous system (PNS). The PNS
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Chameleons Organism Physiology Brianna Kibler October 1‚ 2014 Principles of Biology BIO/101 Matthew Scholten Organism Physiology We know that an organism is anything that is living and can function by itself. This paper will help understand chameleons and how they have evolved to adapt to their surroundings. It will also discuss their physical features inside and out. Myths and facts will be revealed‚ as well as a few comparisons between sexes. Though there are many species of chameleons
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Anatomy and Physiology Honors Start Date: Monday‚ August 25‚ 2014 End Date: Wednesday‚ June 3‚ 2015 Estimated Time To Complete: 38 weeks Task Number and Description Mrs. Sowell 904-423-9329 Taylorc4@duvalschools.org Est. Minutes Items for Completion Week Of Aug 25‚ 2014 to Aug 31‚ 2014 01.00 Introduction to Protection and Support 01.01 Introduction to Anatomy and Physiology 45 30 Items for Completion Week Of Sep 01‚ 2014 to Sep 07‚ 2014 01.02 Understanding Anatomy and Physiology 01.03 Tissues
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