bio study guide questions Essay Example

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. We will write a custom essay sample on bio study guide questions specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on bio study guide questions specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on bio study guide questions specifically for you FOR ONLY $16.38 $13.9/page Hire Writer 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- removes aste products from blood and urine; regulates chemical makeup, pH and water balance of blood 6) D igestive ingests and digest food, absorbs nutrients, and eliminates undigested material 7) Endocrine secretes hormones that regulate activities of body, maintains homeostasis 8) Lymphatic system returns excess body fluid to circulatory and functions as part of immune system 9)lmmune defends your body against infections and cancer 10) Nervous- coordinates your bodys activates by detecting stimuli, integrating information and directing the bodys responses 1 1) Reproductive produces gametes and sex hormones. Female system supports a developing embryo and produces milk 4. Understand why an organism must have organ systems which allow for exchange with the environment, and give several examples of this at the cellular level. Complex animals have specialized internal structures that increase surface area. The blood helps maintain the proper balance of materials in the interstitial fluid surrounding body cells. Example: digestive, respiratory, urinary and circulatory systems. 5. Explai n 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

Montana 1948 Practice Essay Essays

Montana 1948 Practice Essay Essays Montana 1948 Practice Essay Paper Montana 1948 Practice Essay Paper Maturity may come at any age any time in a persons life. One moment he or she may be a carefree child, and then suddenly realize that they have been transformed into a mature adult by a powerful and traumatic experience, which they will remember their whole lives. After that, they were never same again. As a result, they rapidly matured into adults. In Montana, the summer of 1948 held a series of tragic events which were to have a permanent and decisive impact on David and his parents. This chain of events were turn David’s young life and his family upside down forever which was to so quickly lead him out of childhood, destroying his innocence and youthful naivety in the process. However, David’s shocking revelations lead to his painful gaining of wisdom. Firstly, David started to change his mind since their housekeeper, Marie Little Soldier’s illness. She refused to see the doctor Frank which is brother of David’s father Wes. Wes called Frank come to house, but Marie insisted Gail stay in room together. After Frank went, she told Gail horrible things that Frank has been doing to Indian girls in reservation. David overheard the conversation between Gail and Wes. â€Å"†¦I was beginning already to think of Uncle Frank as a criminal†¦Charming, affable Uncle Frank was gone for good. †P49 David thought his uncle was good until he heard those frightening statement. David knew this information would change him forever. He took one step toward adulthood by hearing and understanding what his uncle has done. Unfortunately, Marie dead after a few days Frank went to the house. Frank claimed her dead because of pneumonia. Basically, she was sick, but David knew better, he went to deputy sheriff Len McAuley’s house. Len was drunk and reveals the fact that he also saw Frank walking into house before Marie was found dead. David chose to tell his parents what he knew, or at least part he knew about Frank. This shows that he was developing in the area of honesty. Before, David would kept all this to himself, rather than face his parents with knowledge he knows will displease them. Furthermore, a loss of David’s innocence also appears during his killing of a live magpie. This brought an evil in him also reinforcing the fact that he has killed a living creature in the wild and mentioning that â€Å"it can be done in a flick of the finger† â€Å"†¦Looking in the dead bird’s eye, I realized that these strange, unthought-of connections – sex and death, lust and violence, desire and degradation – are there, there, deep in even a good heart’s chambers. †P82 Finally, Wes chose to arrest his brother. Instead f taking him to an actual jail, he thought that he can reduce his murderer and rapist brother some embarrassment by locking him in basement. Julian Hayden sent some men from ranch came to house to break Frank free. Here David was close to being an adult because he realized how he must act and the gravity of situation in which he and his family are involved. He’s far from the child who once looked forward to visits from his uncle and visits to grandfathers ranch. As an adult, he is concerned with the welfare of his family and parents well-being emotionally. David would like to stand by his family when they are in need. He didn’t desert them or feel shameful. He stayed loyal and true to those he cares for and loves. Thus, he has shown his ability to act as an adult should. As a result, in the rapid journey which David has been forced to undertake from innocence to experience, to seeing life in a whole, truthful and certainly more painful way, he learns many lessons and gains important insights, but none more disturbing than that which immediately follows Frank’s suicide. â€Å"You see, I knew! I knew! – I knew! That Uncle Frank’s suicide had solved all of our problems †¦ I felt something for my uncle in death that I hadn’t felt for him in life. It was gratitude, yes, but it was something more. It was very close to love†. P161-162 One can never be too sure when the innocence of childhood is lost, the sure thing is that everyone becomes an adult eventually, and thats when they lose their innoc ence. In many cases, this change from child to adult is a harsh thing, and often it is the realization that the world is not perfect.