BSC 2346 Module_05_Midterm_Exam_Review

BSC 2346 Module_05_Midterm_Exam_Review Mid-Term Exam Review: PowerPoint Lecture Topics/Objectives Module 01 Scientific Method Review • Define the scientific method. The way we seek new knowledge • Label the steps to the scientific method. Observation, measurement, experiment, formulation, testing & modification of hypothesis • Define the variables associated with the scientific method. Independent variable-one the scientist changes Dependent variable-The variable scientist is watching for change Controlled variable- The variable that is constant Module 01 Homeostasis Review • Define metabolism and its role within the body. Metabolism-Chemical reactions involved in the maintain the living state of organisms. Chemical reactions make things in the body work. 2 types: Anabolism-smaller, simpler molecules are combines into larger, complex molecules. Uses energy Catabolism- breaking down larger, complex substances into simple molecules. Releases energy • Explain the process of homeostasis. We have a set point (physiological valve around which normal values fluctuate) This creates a normal range (restricted values for healthy and stable living). When something goes out of range a negative feedback look takes place(Mechanism that prevents physiological response from going beyond normal range by reversing an action once normal range is exceeded) The sensors/receptors measure the physiological values. The effectors are responsible for reversing the situation to return to normal range. • Compare and contrast negative and positive feedback loops. Positive feedback loop: Moves a bodys state of stability away from normal range. (childbirth, blood loss) Negative feedback loop: Works on moving a body’s state of stability back to its normal range of values. (sweating) • Discuss the importance of maintaining homeostasis. Feedback loops are important because if we exceed or normal values range for to long it can cause detrimental effects on our bodies, even death. Its an important response as it keeps our body stable and functioning at its best. Module 01 Chemistry Review • Define the structure of an atom. Electrons surrounding a nucleus, which contains a proton and neutrons