Hull's Theory | in Chapter 09: Motivation | from Psychology: An Introduction by Russ Dewey Hull's Theory Biological motives are those that are "wired into the nervous system." They include hunger, thirst, the pursuit of pleasure, and the avoidance of pain. How was Hull's theory ambitious? Hull's theory was one of the first systematic attempts to explain motivation. What stereotype is due partly to Hull's theory? Research on Hull's theory is largely responsible for an old stereotype of experimental psychologists as lab-coated figures watching rats run through mazes for cheese reinforcement. Why should students know about Hull's theory? For beginning students, Hull's theory remains relevant in several ways. The Hullian Approach In the 1930s, Clark Hull undertook to construct a grand theory that he thought would unite all psychology. Clark Hull What concept was featured in Cannon's book? Scientists knew about biological regulation as early as the mid-1800s, but the concept of homeostasis was not widely discussed until Walter B. Where did motivation come from, according to Hull?
Extract DNA from your Halloween pumpkin. Click on the photo for a larger image. Towards the end of October we start seeing lots of recipes for pumpkin this and pumpkin that. This one is different. We're going to extract the DNA from a pumpkin. What you need: A pumpkin. What we do with all that stuff Cut the pumpkin into small chunks that fit in the blender. Add about a half cup of water to the pumpkin chunks, and a tablespoon of salt. Now we add a whole bunch of dishwashing detergent. Next we filter the puree using the coffee filter and funnel. Now it is time to get the liquor out of the freezer. For this part, a shot-glass would be appropriate. Pour some of the filtered pumpkin juice into the container. Now, tilt the container and very gently pour some of the alcohol slowly so that it forms a layer on top of the juice, and does not mix. After a few seconds, you will see a ghostly layer of DNA form between the juice and the alcohol. Pumpkin is made of water, cellulose, sugars, proteins, salts, and DNA.
Case It Home Page - free molecular biology computer simulations simulation software Case It! is a National Science Foundation - sponsored project which provides a framework for collaborative case-based learning via free, open-ended molecular biology simulations and cases based primarily on genetic and infectious disease . Case It v6.06 * is a simulation that performs common laboratory procedures on any DNA or protein sequence. It has all of the capabilities of the earlier version (6.05), but adds new features such as SNP and expression microarrays. CaseItv6.06 must be used in conjunction with MEGA4 or MEGA5 ** to fully implement bioinformatics features. Case descriptions are in the Student version of the Resource Manual. Note : We are in the process of converting older tutorials to the new screencase video format.
What If All 7.1 Billion People Moved To Tunisia? I’ve always been interested in the distribution of the human population across the globe. It’s far from an even spread—this map shows where people are most squished in (dark colors) and where they’re spread out (light colors): And the East Asian countries in particular are so jam-packed with people that there’s this insane fact: (Parts of Malaysia and Indonesia have been intentionally left out—without them, the red regions still contain more than 50.2% of the world’s population.) To gain perspective on just how differently people are living on this planet, I looked up the average population density of a particular city, state, or country, and imagined all humans living at that density. (While we’re here—if all the habitable land on Earth were as dense as Manhattan, you could fit 1.73 trillion people on the planet.
Genetic Witness: Science, Law, and Controversy in the Making of DNA Profiling (9780813541884): Jay D. Aronson Terrifying images from the microscope (16 pictures These spectacular images were captured using a variety of traditional micrioscoape. The world they show is terrifying! When viewed up close beneath the unblinking eye of the microscope, the tiniest mites and most harmless of insects become terrifying beasts that haunt your dreams. Image 1 of 16 Chicken embryo \nSource: Tomas Pais de Azevedo/Nikon / via: asia.cnet.com Hydrothermal worm Source: Philippe Crassous / via: fei.com Mosquito eye Source: Oliver Meckes / via: fei.com Marine worm Source: Philippe Crassous / via: fei_company Maggot Image by EYE OF SCIENCE/SPL/BARCROFT MEDIA/LANDOV A head lice clinging to a human hair A head lice clinging to a human hair A wasp’s head Swollen tick Water bear Source: Oliver Meckes / via: flickr.com Water mite Source: Nicole Ottawa / via: fei_company Eyelash mite Embryonic Zebrafish Source: David McCarthy / via: laughingsquid.com Caterpillar Cleptoparasitic Bee Source: Jerome Rozen and Glenn Hall / via: bioone.org The face of an ant Source: Stephen Lyth / via: st-stev
The Future of Case Study Teaching in Science | DivCHED CCCE: Committee on Computers in Chemical Education The Future of Case Study Teaching in Science By Clyde Freeman Herreid, University at Buffalo Paper 1: Download PDF Printable Version of Paper Abstract: Case study teaching in undergraduate science courses began 20 years ago. Today thousands of K-16 teachers are using the method and there are major websites that post hundreds of case studies and teaching notes in all STEM disciplines, especially the biological sciences. It is a puzzle why more chemists and other physical scientists have not embraced the method, since there is strong evidence that it is superior to the traditional lecture approach. But since there are over a dozen different methods of case teaching, which variation is the best surely depends upon an instructor’s goals. The Past: A hundred years have passed since the Harvard Law and Business Schools adopted case study teaching. McMaster University’s Medical School was to get into the case study business in education in a big way in the 1970’s. Figure 1 from Lord, 2007
100 Weird Facts About the Human Body 100 Weird Facts About the Human Body Friday, April 2, 2010 at 5:23pm by Site Administrator The human body is an incredibly complex and intricate system, one that still baffles doctors and researchers on a regular basis despite thousands of years of medical knowledge. As a result, it shouldn’t be any surprise that even body parts and functions we deal with every day have bizarre or unexpected facts and explanations behind them. From sneezes to fingernail growth, here are 100 weird, wacky, and interesting facts about the human body. The Brain The human brain is the most complex and least understood part of the human anatomy. Nerve impulses to and from the brain travel as fast as 170 miles per hour. Hair and Nails While they’re not a living part of your body, most people spend a good amount of time caring for their hair and nails. Facial hair grows faster than any other hair on the body. Internal Organs The largest internal organ is the small intestine. Bodily Functions Sex and Reproduction
Teaching strategies If you have dropped into this Course Design Tutorial from somewhere else, you might wish to start at the introduction, overview, or table of contents. If you are working through the tutorial, you should have completed Part 2.1 before beginning this section. At this stage of the tutorial, you have set overarching goals, organized content, and developed a course plan with ideas for how to give students the practice that will make it possible for them to achieve the course goals. In this section of the tutorial, you will make choices about what you will have students do in order to learn the course content and practice the goals. Start by downloading the worksheet (Microsoft Word 22kB Jun16 05) that goes with this part, and use it as you work through the sections below. Student Learning An enormous amount has been written in the last two decades about research on how people learn. Research shows clearly that a person must be engaged to learn. What messages can we take home for course design?
The 2013 Microscope Images of the Year The yawning trap of a carnivorous plant has taken First Prize in the 2013 Olympus BioScapes Digital Imaging Competition. Igor Siwanowicz, a researcher from the Howard Hughes Medical Institute captured the fascinating photo. The confocal image was selected from more than 2100 entries. In addition to the Top 10 award-winning recipients, 69 Honorable Mentions received recognition this year, including 55 still images and 14 movies. Next year’s competition, which closes September 30, 2014 is already open for participants. 1st Place Igor Siwanowicz Open trap of aquatic carnivorous plant, humped bladderwort (Utricularia gibba). 2nd Place Dorit Hockman A lateral view of a black mastiff bat embryo (Molossus rufus), at the “Peek-a-boo” stage when its wings have grown to cover its eyes. 3rd Place Dr. A composite image showing a collection of single-cell fresh water algae, desmids. 4th Place Spike Walker Stained transverse section of a lily flower bud. 5th Place Dr. 6th Place Kurt Wirz 8th Place Dr.
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