Professor Mumford mumford@purdue.edu Econ 360 - Fall 2012 Problem Set 1 Answers True/False (30 points) 1. FALSE If (ai ‚ bi ) : i = 1‚ 2‚ . . . ‚ n and (xi ‚ yi ) : i = 1‚ 2‚ · · · ‚ n are sets of n pairs of numbers‚ then: n n n (ai xi + bi yi ) = i=1 i=1 ai x i + i=1 bi yi 2. FALSE If xi : i = 1‚ 2‚ . . . ‚ n is a set of n numbers‚ then: n n n n n (xi − x) = ¯ i=1 n i=1 2 x2 i − 2¯ x i=1 xi + i=1 x = ¯ i=1 2 x2 − n¯2 x i where x = ¯ 1 n i=1 xi 3. TRUE If xi : i = 1‚ 2‚ . .
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Why is cardiovascular exercise important? There are many reasons‚ as for one cardiovascular exercise helps your heart and lungs supply oxygen and blood to working muscles. Cardiovascular exercise helps you lose weight and it gets your heart rate up to prevent heart attacks‚ strokes‚ and sickness such as diabetes. In my opinion Cardiovascular exercise is very important and should not be ignored. Also in my opinion a child the age 5-15 should get at least 2-3 hours of exercise a day. Cardiovascular
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is Exercise Physiology? Exercise physiology is a scientific discipline that focuses on how an organism responds to exercise. Exercise represents one of the greatest stresses that an organism can encounter. Therefore exercise represents an outstanding model for studying human and animal physiology. Most people are familiar with the study of exercise physiology as it relates to sport performance. However‚ in the last several decades it has become apparent that the study of exercise physiology
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Activity 1 Pre-Lab Quiz K+ inside a cell = 150 mM; K+ outside a cell = 5 mM Na+ inside a cell = 5 mM; Na+ outside a cell = 150 mM Stop & Think question What is the polarity of the resting membrane potential (voltage)? Negative What does it mean that the voltage just inside the membrane is negative? B Membrane of most cells contains K+ leak channels…..b What will happen to the resting membrane potential if the extracellular K+ concentration is increase? Less negative What happens
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Chapter 14: Cardiovascular Physiology Cardiovascular Physiology Chapter 14 " Heart anatomy " Cardiac muscle cells " Autorhythmic cells " Cardiac cycle " Cardiac output " 1 Functions of Circulatory System " Transportation" – Respiration" Transport 02 and C02." – Nutrition" Absorbed digestion products delivered to liver and tissues" – Excretion" Carry metabolic wastes to kidneys" – Hormonal: " Carry hormones to target tissues" 2 The cardiovascular
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THE MORE EXERCISE AND HEALTIER LIFE These days‚ most people have busy work life. As a result of this‚ they do not devote sufficient time for regular exercise. At the same time‚ they are not aware of how important regular exercise is for their health. The majority of people do not know that regular exercise helps people to protect from heart disease‚ obesity‚ back pain. This situation causes to increase some diseases such as heart
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PhysioEX notes Autorhythmicity- heart’s ability to trigger its own contractions Phase O- a lot like depolarization in neuronal action potentials. Sodium channels open‚ increase of sodium INTO cell. Phase 1- sodium channels close‚ potassium channels close‚ decrease in potassium and sodium. Calcium channels open‚ increase of calcium into cell. Phase 2- Plateau phase‚ membrane still depolarized (contract). Potassium channels closed‚ L-type calcium channels stay open. Lasts 0.2 seconds/200
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predicted that the resting membrane potential would become less negative. 3. The extracellular Na+ did not alter the membrane potential in the resting neuron because the Na+ channels were mostly closed. 4. Na+ and K+ both have a relative permeability of 0 voltage outside a resting neuron and a relative negative permeability inside a resting neuron. 5. A change in Na+ or K+ conductance would affect the resting membrane potential because if the membrane is permeable to a particular ion‚ that ion will diffuse
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consider an Exercise Physiology degree. It is a specialization within the kinesiology field where experts gain a thorough understanding of how our bodies react to physical activity as well the effects of sustained physical activity on the body. It is a great field if you are serious about exercise and would like to work in a field with numerous job opportunities that align with
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AP Biology Reading Guide Fred and Theresa Holtzclaw Chapter 8: An Introduction to Metabolism Name_______________________Period___________ Chapter 8: An Introduction to Metabolism Concept 8.1 An organism’s metabolism transforms matter and energy‚ subject to the laws of thermodynamics 1. Define metabolism. 2. There are two types of reactions in metabolic pathways: anabolic and catabolic. a. Which reactions release energy? b. Which reactions consume energy? c. Which reactions build up larger molecules
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