bio study guide questions Essays

bio study guide questions Essays bio study guide questions Essay bio study guide questions Essay Chapter: 20 Part: 1 of 1 Parts Major Topic(s) Covered: Unifying Concepts of Animal Structure and Function Read Additional Section(s): Individual Assignment(s): In class your group will be asked to answer the following question: The regulatory mechanisms that an organism uses result from an evolutionary process. Some organisms regulate their internal body temperature, and others do not. Make two suggestions as to what the evolutionary advantage might be for each of these two, quite different, lifestyles. Why this Material? Each of the living organisms on the planet Earth has evolved a istinctive body form (morphology) at a variety of levels: cellular, tissue. organ, whole animal. Yet we never should forget that it is the actual functioning of living matter at the these levels that that is at the heart of living processes. Thus, it is not possible to separate the analysis of an organisms structure from the functions that those structures carry out. And of course, evolutionary forces work on both structure and function. In this section we will look at common themes that we find in the structure- function relationships found in animals. Given the short evolutionary times (relative o the age of life on the planet) and the fact that all living things can be traced back to common ancestors, it will not be surprising that the arrangement and functioning of living systems is very similar in most animals. This section will also give us the opportunity to understand the control mechanisms necessary to maintain life and how organisms interact with their surroundings. While we will focus on animals, you might keep in mind how these principles and ideas will relate to the other large group of multicellular organisms the plants. We will have a chance to look at those ore closely in a few weeks. Learning Objectives: Upon completion of this learning guide, you should be able to: 1. Describe relationship between structure and function in an animal. Anatomy study of the form of an organisms structures Physiology study of the functions of those structures 2. Be able to define the terms: tissue, organ, and organ system and understand the hierarchy of animal structure. Tissue an integrated group of similar cells that perform a common function and structure Organ made up of two or more types of tissues that together perform a pecific task Organ system consists of multiple organs that together perform a vital body function 3. Know the major organ systems in the animal by being able to describe its function and the primary organs that make it up. ) circulatory delivers 02, nutrients to cells, transports C02 to lungs metabolic wastes to kidneys 2) respiratory exchanges gases w/ environment, supplies blood w/ 02 disposing of C02 3) integumentary protect body against physical injury, infection, excessive heat/cold, drying out 4) Skeletal supports body, protects organs, provides framework for muscles to produce movements 5) Urinary: digestive, respiratory, urinary and circulatory systems. 5. Explain what is meant by the term homeostasis and the mechanisms that organisms use to maintain this state. Homeostasis a steady state Homeostasis mechanisms regulate internal conditions, resulting in much smaller changes in the animals internal environment. Homeostasis depends on negative feedback: Control systems detect change and direct responses. Negative-feedback mechanisms keep internal variables fairly constant, with small fluctuations around set points. 6. Understand the meaning and use of the following terms or ideas: CT computed tomography (x-ray) PET Positron-emission tomography (glucose) MRI Magnetic Resonance Imaging (hydrogen atoms) Interstitial fluid solution that body cells are bathed with; exchange takes place through this fluid

Hamlet Summary, Act-by-Act

Hamlet Summary, Act-by-Act William Shakespeare’s play Hamlet takes place in Elsinore, Denmark after the death of King Hamlet. The tragedy tells the story of Prince Hamlets moral struggle after his father’s ghost tells him that Claudius, Prince Hamlets uncle, murdered the king. Act I The play begins on a cold night with the changing of the guard. King Hamlet has died, and his brother Claudius has taken the throne. However, for the past two nights, the guards (Francisco and Bernardo) have seen a restless ghost resembling the old king wandering the castle grounds. They inform Hamlet’s friend Horatio of what theyve seen. The next morning, the wedding of Claudius and Gertrude, the wife of the late king, takes place. When the room clears, Hamlet soliloquizes on his disgust at their union, which he views as a betrayal of his father at best and, at worst, incest. Horatio and the guards enter and tell Hamlet to meet the ghost that night. Meanwhile, Laertes, the son of the kings advisor Polonius, is getting ready for school. He says goodbye to his sister Ophelia, who is romantically interested in Hamlet. Polonius enters and lectures Laertes extensively on how to behave at school. Both father and son then warn Ophelia about Hamlet; in response, Ophelia promises to no longer see him. That night, Hamlet meets the ghost, who claims to be the ghost of the king- Hamlets father. The ghost says that he was murdered by Claudius, that Claudius put poison in his ear while he slept, and that Gertrude slept with Claudius even before his death. The ghost orders Hamlet to avenge the murder, but not to punish his mother. Hamlet agrees. Later, he informs Horatio and Marcellus, one of the guards, that he will pretend to be mad until he can get his revenge. Act II Polonius sends a spy, Reynaldo, to France to keep an eye on Laertes. Ophelia enters and tells Polonius that Hamlet entered her room in a mad state, grabbing her wrists and staring wildly into her eyes. She also adds that she has cut off all contact with Hamlet. Polonius, certain that Hamlet is madly in love with Ophelia and that it was Ophelias rejection that put him in this state, decides to meet the king to concoct a plan to spy on Hamlet in conversation with Ophelia. Meanwhile, Gertrude has asked Hamlet’s school friends Rosencrantz and Guildenstern to try to figure out the cause of his madness. Hamlet is suspicious of them, and he evades their questions. Soon, a theatre troupe arrives, and Hamlet requests that the following night they perform a certain play, The Murder of Gonzago, with a few passages inserted written by Hamlet. Alone on stage, Hamlet voices his frustration about his own indecisiveness. He decides he must figure out if the ghost is truly his father or if it is a specter leading him to sin without reason. Because the play depicts of a king who kills his brother and marries his sister-in-law, Hamlet believes that the performance scheduled for the next night will make Claudius show his guilt. Act III Polonius and Claudius spy on Hamlet and Ophelia as she returns the gifts he gave her. They become confused when Hamlet spurns her, telling her to go to a nunnery. Claudius concludes that the cause of Hamlets madness is not his love for Ophelia, and decides that he should send Hamlet away to England, unless Gertrude can figure out the true cause. During the performance of The Murder of Gonzago, Claudius stops the action just after the scene in which poison is poured into the kings ear. Hamlet tells Horatio he is now certain that Claudius murdered his father. In the next scene, Claudius attempts to pray in church, but his guilt prevents him from doing so. Hamlet enters and readies himself to kill Claudius, but stops when he realizes that Claudius might go to heaven if he is killed while praying. Gertrude and Hamlet have a bitter fight in her bedchamber. When Hamlet hears a noise behind the tapestry, he stabs the intruder: it is Polonius, who dies. The ghost appears again, rebuking Hamlet for his harsh words against his mother. Gertrude, who cannot see the ghost, becomes certain that Hamlet is mad. Hamlet drags Polonius’s body offstage. Act IV Hamlet jokes with Claudius about killing Polonius; Claudius, fearing for his own life, orders Rosencrantz and Guildenstern to bring Hamlet to England. Claudius has prepared letters telling the English king to kill Hamlet when he arrives. Gertrude is told that Ophelia has gone mad with the news of her father’s death. Ophelia enters, sings a number of strange songs, and speaks of her father’s death, insinuating that her brother Laertes will get revenge. Soon, Laertes enters and demands Polonius. When Claudius tells Laertes that Polonius he is dead, Ophelia enters with a bundle of flowers, each one symbolic. Laertes, upset by his sister’s state, promises to listen to Claudius’s explanation. A messenger approaches Horatio with a letter from Hamlet. The letter explains that Hamlet snuck onto a pirate vessel that attacked them; after they parted, the pirates mercifully agreed to take him back to Denmark in return for some favors. Meanwhile, Claudius has convinced Laertes to join him against Hamlet. A messenger arrives with a letter for Claudius from Hamlet, announcing his return. Quickly, Claudius and Laertes plot how to kill Hamlet without upsetting Gertrude or the people of Denmark, with whom Hamlet is popular. The two men agree to arrange a duel. Laertes acquires a poison blade, and Claudius plans to give Hamlet a poisoned goblet. Gertrude then enters with news that Ophelia has drowned, reigniting Laertes’s anger. Act V While digging Ophelia’s grave, two gravediggers discuss her apparent suicide. Hamlet and Horatio enter, and a gravedigger introduces him to a skull: Yorick, the old king’s jester whom Hamlet loved. Hamlet considers the nature of death. The funeral procession interrupts Hamlet; Claudius, Gertrude, and Laertes are among the entourage. Laertes jumps into his sister’s grave and demands to be buried alive. Hamlet reveals himself and brawls with Laertes, exclaiming that he loved Ophelia more than forty thousand brothers could. After Hamlet’s exit, Claudius reminds Laertes of their plan to kill Hamlet. Hamlet explains to Horatio that he read Rosencrantz and Guildenstern’s letters, rewrote one demanding the beheading of his former friends, and swapped the letters before escaping on the pirate ship. Osric, a courtier, interrupts with news of Laertes’s duel. At the court, Laertes takes up the poisoned blade. After the first point, Hamlet refuses the poisoned drink from Claudius, from which Gertrude then takes a sip. While Hamlet is unguarded, Laertes wounds him; they grapple and Hamlet wounds Laertes with his own poisoned blade. Just then, Gertrude collapses, exclaiming she has been poisoned. Laertes confesses the plan he shared with Claudius, and Hamlet wounds Claudius with the poisoned blade, killing him. Laertes asks for Hamlet’s forgiveness, and dies. Hamlet asks Horatio to explain his story and declares Fortinbras the next king of Denmark, then dies. Fortinbras enters, and Horatio promises to tell the story of Hamlet. Fortinbras agrees to hear it, declaring that Hamlet will be buried as a soldier.