...breaking down molecules the process of anabolism is to build intricate molecules from simple substances by using energy which again acts as a catalyst. There are many different activities involved in supplying energy to the variety of cells in the body. The first system that I will be talking about is the respiratory system. The main job that constantly takes place is the system refreshing the lung oxygen and the disposal of waste substances and products, this often includes water and carbon dioxide. The removal of these waste products and the refreshing of the lungs happen during the process of what we call breathing. The oxygen that has been dissolved is transported to cells around the body; the transportation method is through the slim alveolar walls and into the flow of the bloodstream. The flow is kept in a constant motion from the pumping of the human heart. The cells in the body are constantly welcomed by raw materials and substances that are sent from chemical reactions that have produced the products. The types of materials that are delivered are glucose, dissolved oxygen and nutrients, these products...
Words: 851 - Pages: 4
... The Second Air Pollutant Carbon Dioxide The second air pollutant is carbon dioxide. Carbon dioxide is considered a primary pollutant due to its presence in the atmosphere but it does become toxic when increase releases cause it to rise about its natural concentrations. The increase levels of carbon dioxide is a major contributor to the greenhouse effect. The sources of primary pollutants are called mobile sources these include trucks and cars. Other sources of pollutants are known as stationary or industry which includes industrial sites or power plants, etc. The most prevelant gases in the earth’s atmosphere are nitrogen and oxygen. Nitrogen is at 78% and carbon dioxide at 0.04%. When a source of energy, such as fuel combustion, yields increased temperatures, nitrogen oxide gases produce chemical connections between oxygen and nitrogen. The four layers in our atmosphere are thermosphere, stratosphere, mesosphere and troposphere. Greenhouse gases are created from...
Words: 771 - Pages: 4
...Module 1 Questions Module 1 Questions Module 2 Questions Module 2 Questions Module 2 Questions Module 2 Questions Module 2 Questions Module 1 Questions Module 1 Questions Module 2 Questions Module 2 Questions Module 2 Questions Module 1 Questions Module 2 Questions Module 2 Questions Module 1 Questions Module 1 Questions Module 2 Questions Module 2 Questions Module 1 Questions Module 2 Questions Module 1 Questions Module 2 Questions Module 2 Questions Module 2 Questions Module 1 Questions Module 1 Questions Module 1 Questions Module 1 Questions Module 1 Questions Module 2 Questions Module 2 Questions Module 2 Questions Module 2 Questions Module 1 Questions Module 1 Questions Module 1 Questions Module 2 Questions Module 1 Questions Module 1 Essay Questions Question Why small particles weather faster than large ones: Why is silica the major component of magma?: Why clay doesn't weather Which type of magma is primarily associated with high viscosities? Which type of basaltic lava flow has its surface covered with sharp-edged, angular blocks and rubble? Which type of basaltic lava flow has a fairly smooth, unfragmented, ropy surface? Which the following denotes the positively charged particles in an atom's nucleus? Which sedimentary rock listed below has a biochemical origin? Which sedimentary rock consists of materials that originated and were transported as solid particles? Which rock type is associated with a high-energy environment (such as a very turbulent stream)? Which property...
Words: 4036 - Pages: 17
...AP Biology Exam Review: Lab Essays At least one essay (FRQ) on the exam will be based on an AP laboratory. To prepare for this question, review the objectives for all twelve laboratory exercises. The College Board does not necessarily expect that you have completed that lab, but rather that you have investigated the objectives of the lab. You may be asked to “design an experiment to determine….” You don’t necessarily need to create a new lab; if you have done an activity that would answer the question, simply describe it. For a good response, you should include the following. 1. State a hypothesis [as an “if…..(conditions), then….(results)” statement] Be sure your hypothesis is testable. 2. Identify the variable factor. 3. Identify the control. Be certain to explain the control for the experiment. 4. Hold all other variables constant. 5. Manipulate the variable. 6. State how you would measure the results. 7. Discuss the expected results. Relate the results to your hypothesis. 8. Include steps to replicate or verify. You may be asked to graph data. Be sure to use a graph that is appropriate for you data. Bar graphs are used when data points are discrete (not related to one another), while line graphs are used with the data are continuous. If there is a data point at zero, be certain to extend your line to 0, but do not extend the line to 0 if there is no data point at zero. Other points to keep in mind: ...
Words: 2702 - Pages: 11
...Exam 3 Essay Portion Directions: Both the multiple choice portion and the essay portion of the examination will be available on Wednesday of Module 8 at 12:01 AM ET. The essay portion will close on Sunday at 11:55 PM ET. Choose 7 of the following 10 questions listed below. Your answer for each question should be a minimum of 150 words (half page). Please number your answers and print the number of the question you are answering above your answers. Identify subsections accordingly. We suggest you write or print out the essay questions for handy reference as you develop your answers. 1) Blood isolated from an emergency room patient contains antibodies against the measles virus. Please explain whether or not the patient should be quarantined immediately because they are infected with the measles virus and why? What are the other plausible explanations for anti-measles antibodies in the patient’s blood? 2) Describe how the clonal expansion theory explains the more rapid production of antigen specific antibodies, Helper T-cells and Cytotoxic T-cells, during a secondary infection. 3) Positive diagnosis of AIDS is made when a patient has antibodies against the human immunodeficiency virus (HIV). Please explain why the patient has an immune deficiency if he or she is making antibodies? 4) Characterize the differences and similarities between innate and adaptive immunity in form and function. 5) What is the effect of discharging primary-treated sewage on the biochemical oxygen demand...
Words: 444 - Pages: 2
...Eutrophication Eutrophication is the process by which a body of water becomes rich in dissolved nutrients from fertilizers or sewage, thereby encouraging the growth and decomposition of oxygen-depleting plant life and resulting in harm to other organisms (Encarta dictionary 2007). This is one of the ecological problems that are affecting PAU thought others don’t see it as a problem. Thus, the essay will discuss further on how it is started and evidences of its existence, how to minimize or prevent it from eventuating, and how it affects the environment in which we live in and give a real case study of its effects. Eutrophication began to develop on the lakes of PAU when the campus department stopped cleaning the lakes in order to let the birds to lay their eggs on the flowers growing in the lakes. This is evident in lake two. This has led to eutrophication due to the overcrowding of plant life in the lakes. Some proof that the lakes are becoming entropic are that they smell, overgrowth of plants means the level of oxygen is depleted and less penetration of sunlight, algae are starting to cover the surface of the lakes. Therefore, this shows that lakes here at PAU are starting to become eutropic. Prevention is better than cure therefore it is better to prevent the lakes from becoming eutropic than to cure it after it has become eutropic. As stated in the article, ‘How to cure Eutrophication’ (2012, May 17) that a pond that has become eutropic is hard to rehabilitate. This is...
Words: 627 - Pages: 3
...Biology 141, Fall 2012 Exam 1 Study Questions (rev. 083112) The questions on the first hour exam will be based on those given below. Questions on the exam will be in multiple choice form, but if you can answer the questions here, you will have no trouble with the exam. [Notes: 1. These questions are meant to provoke thought and study. Do not ask the instructors or the TAs to provide you with the answers. 2. Crossed out study questions will not be use as the basis for exam questions.] 1. What is the difference between an hypothesis and a scientific Theory? Between an hypothesis and a prediction? What kinds of hypotheses are useful for scientific investigations that try to explain the natural world, and which are not? Give one or more examples of hypotheses that are and are not scientifically useful. 2. Two of the greatest unifying ideas in biology (i.e., concepts that account for and are consistent with a very large number of observations) are the Cell Theory, and the Theory of Evolution by Natural Selection. Most scientific Theories have two components: the pattern component and the process component. What are the two components of Cell Theory and of the Theory of Evolution by Natural Selection? What are the two conditions required by the process component of evolutionary theory? 3. What is the hypothesis of Spontaneous Generation and how does Cell Theory challenge that hypothesis? In the Pasteur experiment two types of flasks were used. For each flask, what...
Words: 1765 - Pages: 8
...Environmental Pollution Environmental pollution is one of the biggest problems the world faces today. It is an issue that troubles us economically, physically and everyday of our lives. The contamination of the environment is also being linked to some of the diseases that are around currently. Yet, most people do not know about this problem. This shows that environmental pollution is becoming an increasingly worse problem that needs to be taken care of as soon as possible, not only for the good of the environment but also for the people that live in it. Many factors are present for why environmental pollution has become such a large issue in the world. However, if the people of the world were to address the issue it would definitely help both the environment and it’s people. There are many activities that can be done by both the common citizen to the governments of the world, which could severally improve the world’s environmental problem. On the other hand, if the current way the world’s environmental problem is being handled continues, catastrophic consequences can follow for the future population. http://www.exampleessays.com/viewpaper/12389.html Nowadays environmental problems are too big to be managed by individual persons or individual countries. In other words, it is an international problem. To what extent do you agree or disagree? An essential problem of the 21st century is world pollution. Currently the environment is so much contaminated that urgent measures...
Words: 3474 - Pages: 14
...fusion of water. D. All of the choices are correct. Question 3 Animals that rely mainly on external sources of energy for regulating body temperature are called: A. epitherms. B. endotherms. C. ectotherms. D. peritherms. Question 4 In general, reptiles are considered to be a/an: A. poikilotherm. B. homeotherm. C. endotherm. D. heterotherm. Question 5 Mammalian and avian aquatic endotherms use all of the following mechanisms to thermoregulate EXCEPT: A. fat. B. internal respiratory systems. C. fur or feathers. D. concurrent heat exchange. Question 6 The water availability for organisms is determined by: A. internal dissolved ion concentrations. B. external dissolved ion concentrations. C. movement of water down its concentration gradient. D. movement of water up its concentration gradient. Question 7 Aquatic organisms whose ionic concentration of their body fluids exceed that of their surroundings are: A. hyperosmotic. B. hypoosmotic. C. isoosmotic. D. osmotic. Question 8 In order to survive in the desert, a camel will employ which of the following mechanisms? A. Face away from sun B. Store water in its...
Words: 5231 - Pages: 21
...Heart Essay When a performer starts to exercise, they inevitably increase rate of respiration, meaning they require more glucose and oxygen (if aerobic) and need to primarily remove more carbon dioxide as well as lactic acid (if anaerobic). The first way this is done is by secretion of the hormone adrenaline into the bloodstream. Adrenaline in blood is picked up by chemoreceptors in the aortic arch, impulses are then sent to cardiac control centre (in the medulla oblongata) via sympathic nerve which increases heart rate. Adrenaline (epinephrine) facilitates greater cardiac output, meaning a greater volume of blood pumped into the systemic circuit, carrying more oxyhaemoglobin. Adrenal gland also secrets norepinephrine (a different hormone), which causes the blood vessels to constrict (narrowing of lumens) the increases blood pressure. When the cardiac control centre in the medulla oblongata receives nerve impulses it sends a nerve impulse to the SA (Sino-Atrial) Node, which sends the wave excitation across both atria causing atrial muscles to contract (atrial systole) forcing blood through bicuspid and tricuspid valves. The wave of excitation (electrical impulse) hits the AV (atrio-ventricular) Node. This sends the wave down the septum through the bundle of his and purkinje fibers, which then hits apex of the heart and spreads round ventricle muscular walls causing them contract. This is called ventricular systole, causing bottom to top contraction forcing blood into arteries...
Words: 1980 - Pages: 8
...Pre-AP Biology Chapter 2 Test Chemistry of Life Multiple Choice (1 point each) Identify the choice that best completes the statement or answers the question. ____b 1. The space surrounding the nucleus of an atom contains |a. |protons. |c. |neutrons. | |b. |electrons. |d. |ions. | ____c 2. If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass number would be |a. |3. |c. |7. | |b. |4. |d. |11. | c____ 3. Isotopes are atoms of the same element with the same number of protons and |a. |a different number of |c. |a different number of neutrons.| | |electrons. | | | |b. |a different number of |d. |the same number of neutrons. | | |molecules. | | | ___d_ 4. Which of the following is...
Words: 1501 - Pages: 7
...Please do not plagiarize. Only use these study questions for study purposes, and to check your own work. Answers are NOT guaranteed to be correct. Biology 141, Spring 2012 Exam 1 Study Questions The questions on the first hour exam will be based on those given below. Questions on the exam will be in multiple choice form, but if you can answer the questions here, you will have no trouble with the exam. [Notes: 1. These questions are meant to provoke thought and study. Do not ask the instructors or the TAs to provide you with the answers. 2. Crossed out study questions will not be use as the basis for exam questions.] 1. What is the difference between a hypothesis and a scientific Theory? Between a hypothesis and a prediction? What kinds of hypotheses are useful for scientific investigations that try to explain the natural world, and which are not? Give one or more examples of hypotheses that are and are not scientifically useful. The difference between a hypothesis and a scientific theory is that a hypothesis is a proposed ‘theory’ and a scientific theory is theories that explain and predict any observable occurrence therefor the scientific theory is testing the hypothesis. The difference between a hypothesis and a prediction is that a hypothesis is used as an explanation to theory, and is proposed at the beginning of an experiment, while a prediction is the result of an experiment based on the hypothesis that is being tested. The kind of hypotheses’ that are...
Words: 5683 - Pages: 23
...INTRODUCTION GROUP 2 (THE ALKALINE EARTH METALS) These elements are categorized as group 2 because they have two electrons in their outer shell, therefore each element in this group will lose two electrons in order to form a 2+. According to RSC (n.d) group 2 elements are all metals with silver-white color. ELEMENT | SYMBOL | No. OF ELECTRONS | Beryllium | Be | 2,2 | Magnesium | Mg | 2,8,2 | Calcium | Ca | 2,8,8,2 | Strontium | Sr | 2,8,18,8,2 | Barium | Ba | 2,8,18,18,2 | TRENDS IN ATOMIC RADIUS The graph below shows that the atomic radius of group 2 elements increases as it descends down the group. (Jim Clark, 2002) “The radius of an atom is governed by the number of layers of electrons around the nucleus due to the pulling power of the nucleus to the outer electrons”(jim clark,2002). For example: Be 1s2 2s2 Mg 1s22s22p63s2 In both atoms the two outer electrons feel a net pull of 2+ from the nucleus. (Jim Clark, 2002) ...
Words: 1556 - Pages: 7
...is the presence of foreign substances (pollutants) in the atmosphere, emitted by industries and motor vehicles that cause damage to living organisms. Air pollution is the leading cause of several diseases. During the past few years, air pollution has emerged as one of the leading causes of death worldwide. Air Pollutants: Air Pollutants refer to the liquids, solids and gases that are not normal constituents of air. Presence of such substances beyond tolerable limits may be hazardous to plant, animal and human life. Air pollutants include oxides of carbon, nitrogen and sulphur, halogenated and non-halogenated hydrocarbons, suspended inorganic particulate matters, inorganic and organic acids, insecticides, bacteria, viruses, etc. Also read: Essay on Environmental Pollution: Causes, Effects and Solution Characteristics: Air pollution characteristics in a particular region are influenced by: * The type and amount of pollutant and their source of emission. * The topographical and meteorological conditions affecting dispersion, concentration and trans-boundary transport of pollutants. * The type of technology and various raw materials used in the manufacturing process and the type and quantum of emissions. * The extent of industrialization and population density. Sources of air pollutants Major sources of air pollution includes both natural sources and man-made source (anthropogenic). A. Natural sources: The natural sources of air pollutants includes volcanic eruptions, forest...
Words: 3530 - Pages: 15
...Pure chemical substances are classified as ionic, metallic, covalent molecular and covalent network. In this essay I will describe the nature of each bonding present in these different types of substances and use this to explain the physical properties they exhibit and their structures. Ionic compounds are compounds that are composed of positive and negative ions. An ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. Usually, the positively charged portion consists of metal (cations) and the negatively charged portion is an (anion) or polyatomic ion. Ions in ionic compounds are held together by the electrostatic forces between oppositely charged bodies. The positive and negative ions in these compounds are thought to be arranged in an orderly three-dimensional lattice. For example, the structure of sodium chloride is shown. In the lattice, each positive sodium ion is surrounded by six negative chloride ions and each negative chloride ion is surrounded by six positive sodium ions. The position of the ions is fixed and apart from vibration about these fixed positions no other movement of the ions occurs in the solid compound. Each ion in an ionic solid is held in the crystal lattice by strong electrostatic attractions to the oppositely charged ions around it. These electrostatic forces between the positive and negative ions are called ionic bonds. Because ionic compounds have high melting points, in other words considerable...
Words: 3332 - Pages: 14
