Anatomy and Physiology Ch. 1 Study Guide Essay Example for Free

Anatomy and Physiology Ch. 1 Study Guide Essay Anatomy the study of the form or structure and arrangement of body parts and their relationships Physiology the study of the functions of the body parts or structures and their relationships in maintaining life processes. Levels of Structural Organization The human body consists of levels of structural organization that are associated with one another. There are six levels of structural organization: I. chemical level It is the simplest level and it includes all of the chemical substances essential for maintaining life. These substances are made up of atoms. An atom is the smallest unit of matter. Matter is anything that takes up space and has mass. Atoms combine to form molecules, which may be simple or complex. Different types of molecules combine to form or~anelles (little organs). Organelles are specific structures that carry out specific functions. 2. cellular level The cell is the basic unit of structure and function and of life. Cells vary in size, shape, and function and may contain many types of organelles. 3. tissue level Tissues are groups of similar cells that perform a specific function. There are four major types of tissues in the human body: a. epithelial tissue It is found lining body cavities and covers the surface of the body. It functions in protection, secretion, and excretion. b. connective tissue It is found on the surfaces of and in organs and tissues and functions in protection, support, and attaching organs and tissues to each other and to the walls of body cavities. c. muscle tissue It functions in the movement of body parts and organs, and in the movement of substances throughout the body. There are three major types of muscle tissue: (1) skeletal muscle It is found attached to and covering bones and it functions in body movement. (2) cardiac muscle It is located in the heart wall and functions in the contraction and relaxation of the heart as it beats. (3) smooth muscle It is located in the walls of internal or visceral organs and it functions in moving substances throughout the body. d. nervous tissue It is located in the brain and spinal cord, and extends to various tissues and organs. It functions in transmitting electrical or nerve impulses from the external and internal environments to the brain and spinal cord where it is interpreted and a response occurs. 4. organ level Organs are groups of two or more types of tissue working together to perform a specific function. 5. organ system level ~ sTstems are groups of organs that work closely together to perform a common function. There are eleven organ systems in the human body: 6. organismal level It is the highest level of structural organization and it consists of groups of organ systems working together to maintain body structure and function. Organ systems work together to maintain an internal environment that is fairly constant, stable, or balanced. This is referred to as homeostasis (to stay the same). Changes do occur, but within very narrow ranges or limits. Homeostasis Body parts or structures function efficiently in maintaining metabolic processes and when the survival needs are within certain limits or optimum levels. The survival needs include: water, oxyqen, nutrients, an appropriate bod~ temperature, and atmospheric pressure. Water is necessary for chemical reactions, excretion, and secretion. Oxyqen is required for many of the metabolic reactions that break down nutrients and provide energy. Nutrients provide energy for cells and cell processes. Bod~ temperature must be maintained within a certain range for chemical reactions and cell processes to perform efficiently. If the body temperature falls too low or increases too high, chemical reactions will slow down or may stop. Atmospheric pressure is the force of air on the body surface by the weight of air. It is important in breathing and in the exchange of oxygen and carbon dioxide in the lungs. To maintain homeostasis there are control mechanisms. Control mechanisms consist of three parts: i. receptor It responds to sensory stimuli from the internal and external environments. The information is sent along afferent pathways to the control center. 2. control center It consists of the brain and spinal cord which interpret and analyze the information and determine an appropriate response. Information is then sent along efferent pathways to the effector. 3. effector It consists of tissues, organs, or glands that perform a motor response to the original stimulus that was received by the receptor. The response involves a feedback mechanism. If the response slows down or inhibit~ the stimulus it is a neqative feedback mechanism. If the response speeds up or enhances the stimulus, it is a positive feedback mechanism. Most control mechanisms for homeostasis in the human body are negative feedback mechanisms.

the tattooed soldier Essay --

Los Angeles, California is often seen as the city of dreams. Hollywood paints the picture of Los Angeles as a place of endless possibilities. Los Angeles is also thought as the city where dreamers can come with nothing in their pocket and become an over night success story. Many Americans and immigrants come to Los Angeles with the same dream of success. In The Tattooed Soldier Tobar describes how this fictionalized â€Å"American dream† version of the Los Angeles affects immigrants. In the novel Tobar followed two Guatemalan immigrants Antonio and Longeria who live very different lifestyles in their home country and in America. Los Angeles seemed to be the land of dreams and promise to both characters, however; Los Angeles becomes a place of harsh reality for Antonio and Longeria. In the novel we watch how Antonio and Longeria adjust to the struggles of being immigrants in Los Angeles, , and what makes man a man. In the first section of The Tattooed Soldier are introduced Antonio. Antonio is coming to Los Angeles to escape the Guatemalan government, and views Los Angeles as a place where...

Differences Between the Wartime, Presidential, and Congressional Reconstruction Essay

There are similarities and differences between the Wartime, Presidential, and Congressional Reconstruction. Each had a purpose and plan. There was a major difference between the Republican President and Republican Congress that caused many conflicts. The Wartime Reconstruction actually started during the war. Lincoln in the beginning wanted settlement of blacks in countries or something known as repatriation. A major part of this Wartime Reconstruction was the Proclamation of Amnesty. What this did was offer a Presidential pardon to all Southern whites who took an oath of allegiance to the Union and accepted abolition of slavery. The only people that were excluded from this were Confederate official and high-ranking military officers. In states where ten percent of male population took the oath they would be able to reestablish a state government. This policy was carried out in Louisiana, Arkansas, and Tennessee. This Wartime Reconstruction also included Lincoln’s Emancipation Proclamation. This freed slaves in the states that were at war with the Union. Both President Lincoln and President Johnson wished to give back land to pardoned ex-Confederates. President Lincoln and Congress were similar in wanting to refute pardons to those who ill-treated or murdered captured black and white Union soldiers. They did agree on this matter. While President Lincoln only required ten percent of allegiance from past Confederates, Congress wanted the majority of white men in Confederate states to take the oath of allegiance. Lincoln was assassinated and Andrew Johnson took presidency. He favored harsh punishment for traitors. He issued two proclamations without help of Republicans. This was the Presidential Reconstruction. When he issued the two proclamations it caused a division. It covered official pardon for whites except Confederate officials and military officers worth more than twenty thousand dollars, and he names a provisional government for North Carolina. Only whites with amnesty could vote there. The South was disobedient and none of the state conventions enfranchised a single black. Johnson issued thirteen though sand five hundred Presidential pardons to those he earlier hoped to keep out. There were many ex-Confederates who were elected to Congress. Also the state legislatures in the south demoted blacks to a second class status, and this was known as the Black Codes. These codes states blacks were not allowed to vote, be on juries, testify against whites, could not interracially marry, and it was most unfair in Mississippi and South Carolina. Johnson like Lincoln wanted to restore the Union in as little time as possible. Congress comes in to play in December 1865. The Congress was made up mostly of Republicans and they refused to let past Confederates to take their seats in Congress at this time. This marked the beginning of Radical Reconstruction or sometimes known as Congressional Reconstruction. The president and the congress did not agree on many issues. Congress overrode President Johnson on the Civil Rights Act of 1866, The Fourteenth Amendment, and the Freedmen’s Bureau Bill. The Fourteenth Amendment spelled out rights of both black and white citizens as equal. It prolonged Federal powers for the enforcement of civil rights. States that approved the Fourteenth Amendment were considered reconstructed, and Tennessee did so. President Johnson advised other southern states to oppose doing this. Congress passed many laws to limit President Johnson’s powers. They passed the Reconstruction Acts of 1867 which set new procedures for readmission to the Union. Johnson did not agree with this act and resisted it. When President Johnson removed Edwin M. Stanton from the head of the War Departments Republicans were very upset. They charged Johnson with the Tenure of Office Act and Johnson was impeached. After President Johnson’s impeachment, the Fifteenth Amendmen t, which prohibited states from denying vote based on color, was ratified. This Radical Reconstruction was successful in passing the Thirteenth, Fourteenth, and Fifteen Amendments. Congress also wanted married law affirmed in the South for the period of Reconstruction and they wanted to discipline ex-Confederates. President Lincoln and Congress did not agree with how many pardons President Johnson gave out. The Wartime Reconstruction, Radical or Congressional Reconstruction, and the Presidential Reconstruction all had their similarities and differences. Each was designed by someone different and had a specific plan and goal in mind. The differences between the president and congress caused many splits and problems. The Radical Reconstruction was most successful in my opinion.

Corporate Social Responsibility And How Corporations Are...

A combination of recent changed to the world scene and pressures from public opinion now requires corporations to take on a new role, social responsibility. Corporate social responsibility is a corporation’s initiative to monitor and ensure compliance with the law, ethical standards, and norms. It can also be defined as corporation’s actions that further social good and go beyond the interests of the firm in order to make the world a better place. Essentially a corporation should embrace the idea of corporate citizenship, the idea that businesses are socially responsible for meeting legal, as well as ethical and economic responsibilities placed on them by shareholders. Although this is an alluring concept, it is also a flawed one. It†¦show more content†¦Individuals are just as responsible as corporations, which is one reason why corporate social responsibility is flawed. Although individuals can be socially responsible, it can be argued that since corporation s have the most money and influence, they are the ones that have a higher standard of responsibility. Corporations can influence their workers, their consumers and possible their shareholders, which is more than an individual can do. It will take many individuals to reach the influence and effects that one corporation’s actions will have on society. Therefore, corporations should be more invested because they will be more productive in achieving their goal. It can also be argued that a corporation is an individual therefore they are socially responsible. The dictionary definition of a corporation is â€Å"a body formed and authorized by law to ac as a single person.† Also, the Supreme Court has also given corporations many of the same rights as individuals have, such as freedom of speech and the right to spend money in candidate elections. These individuals are the ones that have the most impact on the environment, which is why they should be responsible for ensuri ng the safety of the environment. Research has found that nearly 90 â€Å"individuals†, corporations, generated two-third of the greenhouse gas emissions, which has lead to the current climate crisis. Those individuals should be held