develop more successfully in the environment they inhabit. One such case of this successful development is the great hammerhead shark. The great hammerhead shark, also known as Sphyrna mokarran, is a pelagic shark and is found world wide in tropical warm water regions. Great hammerheads are the largest species of hammerhead shark. The great hammerhead can be distinguished from other hammerheads by the shape of its “hammer” (called the “cephalofoil”), which is wide an almost straight front margin, and by
In The Cask of Amontillado, Poe describes the picture on the crest as a golden foot crushing a serpent, which has its fangs imbedded in the heel of the foot. Poe also mentions the motto “Nemo me impune lacessit (no one provokes me with impunity)” told by Montresor to Fortunato, which signifies the analysis of this profound picture on the crest. According to the plot of the story, the foot represents not only Montresor but also his status-consciousness and cruelty towards Fortunato. As image of the
Ribbon There once was a ribbon. Her name was Ribbon, as plain as the decorative object that she was. Ribbon was very vain and liked to get up every morning from her place in the sewing basket full of odds and ends. Every morning, she would look into the small pink hand mirror that would be lying beside her in the sewing basket. She would see the cutest, most beautiful face in the whole world every morning and was delighted. Then Ribbon would reluctantly stop admiring herself and would begin to
Hammerhead Sharks Marine Science/ Per. 1 Sharks are one of the most feared sea animals. They live in oceans across the world but are most common in tropical waters. There are over three hundred fifty species of sharks. They can be broadly categorized into the following four groups: Squalomorphii, Squatinomorphii, Batoidea, and Galeomorphii. The shark family Sphyrnidae that includes the Hammerheads are part of the Galeomorphic classification. They are probably the most easily recognizable of all
Anatomy of Muscle Cells There are three types of muscle tissue in the human body. These muscle tissues are skeletal muscles, smooth muscles and cardiac muscles. Each of these muscle tissues has it very own anatomical makeup, which vary from muscle to muscle. The muscle cells in a muscle are referred to as muscle fibers, these fibers are skeletal muscle fibers, smooth muscle fibers and cardiac muscle fibers. The anatomy of a skeletal muscle fiber is formed during embryonic development. Skeletal muscle
Jellyfish Venom Almost anyone who has ever spent time near or in an ocean has been warned about being stung by jellyfish. Jellyfish have been ascribed a reputation as dangerous, often lethal animals. The exact actions of jellyfish toxins are not well understood, and the true danger presented by jellyfish is often exaggerated. This paper will attempt to answer several questions about jellyfish and venom. It will discuss what toxins make up jellyfish venom and the method in which these toxins
Introduction This report will explore the structure and function of skeletal muscle within the human body. There are three muscle classifications: smooth (looks smooth), cardiac (looks striated) and skeletal (looks striated). Smooth muscle is found within blood vessels, the gut and the intestines; it assists the movement of substances by contracting and relaxing, this is an involuntary effort. The heart is composed of cardiac muscle, which contracts rhythmically nonstop for the entire duration of
Skeletal and smooth muscle cells show a number of similarities however they also display many differences. These similarities and differences can be seen through observing the structure and appearance of these cells, their control mechanisms and the ways in which they contract. When observing both cell types under a microscope several differences are obvious. Firstly, skeletal muscles are larger than smooth muscle cells (one muscle cell can be up to 100µm in length). They are also multinucleated
Introduction Consumption of meat is often associated with well industrialised countries all around the world compared to developing countries. The major determinant of meat consumption in the population is mainly wealth; the higher average per capita income of a country, the higher the consumption of meat. This has become a trend in most big countries in the world, as example, America (Daniel et al., 2011). People in industrialised countries, where they are capable to afford to consume meat products
Epithelia tissue : Epithelial tissue, the type of tissue that lines the surfaces and cavities of your body 's organs, epithelia may be composed of several layers of cells called compound epithelia or just a single layer known as simple epithelia. Types of epithelia tissue include the simple epithelia and the compound epithelia: Simple epithelia: Epithelia tissue can have cell shapes these are the Columnar, Cuboidal, and Squamous Cell Shapes. All this cells shapes are part of a type of an epithelia
Skeletal, smooth, and cardiac muscles play a vital role in the everyday processes that allow the human body to function. Without these muscles, everyday tasks and functions could not be conducted. Injury to these muscles could cause serious problems, however, these muscles have the ability to regenerate, repair, and fix multiple problems all by themselves. Repair and regeneration of a muscle are two similar, yet different things. Repair restores muscle continuity so that it can continue to function
Skeleton Muscle Lab Introduction: The contraction of a muscle is a complex process, requiring several molecules including ATP and Cl-, and certain regulatory mechanisms [1]. Myosin is motor protein that converts chemical bond energy from ATP into mechanical energy of motion [1]. Muscle contraction is also regulated by the amount of action potentials that the muscle receives [2]. A greater number of actions potentials are required to elicit more muscles fibers to contract thus increasing the contraction
three types of muscle: cardiac muscle, smooth muscle, and skeletal muscle. Cardiac muscle is a type of involuntary muscle found only in the walls of the heart, specifically the myocardium. Cardiac muscles contract automatically to tighten the walls of the heart in a rhythmic fashion. The heart beats nonstop about 100,000 times each day. Smooth muscle is a type of involuntary muscle found within the walls of blood vessels such as in small arteries and veins. Smooth muscle is also found in the urinary
Introduction The gaseous free radical nitric oxide is an abundant intracellular messenger molecule that plays a central role in maintenance of health, and is heavily involved in signal transduction in various cells of the body [1]. This molecule acts as a mediator in the regulation of cardiac function as well as having an important role in regulating contractility of the heart and maintenance of vascular tone in the cardiovascular system. As one of the most significant individuals in our discovery
Rat ileum consists of longitudinal and circular smooth muscle. The rat ileal smooth muscles express five isoforms of muscarinic acetylcholine receptor MAchR (M1-M5)(Yuan et al., 2011), and seven classes of 5-hydroxytryptamine (5-HT, serotonin) receptors (5-HT1-5-HT7)(Briejer et al., 1997). These receptors are major drug targets and belong to the family of G protein-coupled receptor (GPCR) consisting of seven transmembrane spanning domains (Hannon & Hoyer, 2008; Yuan et al., 2011). Both MAchR and
Larry Oliver EXSC 223 08 November 2016 Assignment 3 1. Explain how smooth graded contractions of a skeletal muscle are produced. When a single stimulus is delivered the muscle will contract and relax. But if another stimulus is applied before the muscle completely relaxes then the result is more tension. At higher stimulus frequencies there is no relaxation between stimuli which is called fused tetanus. At each point of the stimulus, more and more calcium is released increasing the amount of cross
contraction. But, the myosin filaments don’t move. The second type of muscle is smooth, which is found in internal organs and blood vessels. It consists of collections of fusiform cells that don’t show its striations under even a light microscope. The most common function of this muscle is to squeeze, which puts forth pressure on the space inside the tube or organ it surrounds. Contractions of smooth muscle are weak and slow compared with the contractions of the other two kinds.
muscle: cardiac muscle, smooth muscle, and skeletal muscle (p.212). Cardiac muscle is a type of involuntary muscle found only in the walls of the heart, specifically the myocardium. Cardiac muscles contract automatically to tighten the walls of the heart in a rhythmic fashion (pp.212-216). The heart beats nonstop about 100,000 times each day (p.18). Smooth muscle is a type of involuntary muscle found within the walls of blood vessels such as in small arteries and veins. Smooth muscle is also found
motions have been transformed into the perceived direction. This diagram also illustrates the focus of chapters 2, 3 and 4. Chapter 2 investigates the motion aftereffect (see adaptation section) which follows simultaneous retinal motion and repetitive smooth pur... ... middle of paper ... ..., 1994). If the extra-retinal signal is altered by the OKN signal, both the eye movement velocity and the perceived velocity alter accordingly. Other evidence does not support an optokinetic potential model
erectile tissues called corpus cavernosa. They contain large spaces which fill with blood; the skin is loose and elastic. • The erectile tissues are in tinny pools of blood vessels called cavernous sinuses. • Each of these muscles are surrounded by smooth muscles and supported by elastic fibrous tissues, made up of protein called collagen. Epididymis • The epididymis is a coiled up tube, cord like structure that is located posterior to the testes within the sc... ... middle of paper ... ...layers