Experiment essays

Experiment essays Introduction: The purpose of this lab included a review of muscle types. Specifically there are three types of muscle types, smooth, skeletal and cardiac. In this lab we will be specifically focusing on skeletal muscle. Skeletal muscles are made up of thousands of muscle fibers. These fibers are made of thick and thin filaments. The thick filaments are composed entirely of the protein myosin. The thin filaments are composed of actin. The thick filaments can be found in the middle of each sarcomere; entire array of thick and thin filaments between Z lines. The thin filaments are at the end of each sarcomere. The thin filaments are connected to an interconnecting proteins known as the Z line. The thick filaments are arranged in parallel arrangement producing dark bands known as A bands. The thin I band produces the light band. This variation of light band and dark band produce a striped look under a microscope and thus result in the muscle being called striated. The lab also focuses on the mechanism of skeletal muscle contraction. Skeletal muscle contraction is controlled by the nervous system. In a nutshell, skeletal muscle contraction begins with -95mv resting potential. Influx of sodium ions is caused by a stimulus and leads to depolarization and then an action potential is reached. Then the resting potential of the fiber is restored by an outflow of potassium ions. Also, we will be defining and understanding subthreshold, threshold, submaximal, maximal, supramaximal in regards to muscle twitching. Finally we will be demonstrating summation, tetanus and fatigue on the dissected muscle. Materials and Methods: The materials in this lab include the frog leg, transducer, Transbridge Amplifier, Harvard Stimulator, Wire. The methods for this experiment including the dissection, neural stimulation, direct stimulation, summation, tetanus, and the operation of the Harvard Stimulator can be found on page ...

Ways to Spend Your Summer Vacation Productively

Ways to Spend Your Summer Vacation Productively Ah, the summer. You seem to have waited for it forever, right? Finally, theres enough time to watch your favorite shows, go to the beaches, party basically, relax in all the possible ways. Surprisingly, even these activities can turn into routine and bore you to tears. Weve come up with a list of suggestions to add some work to your play. Not only will they help you achieve something during those dog days, but youll also preserve the charm of thoughtless laying on the beach or indulging yourself to another episode of that TV-series. Ready to have fun and challenge yourself a bit? Lets get started then! Learn to Cook or explore new exciting recipes. In case youre not a rookie in the cooking world, you have the whole lot of opportunities to explore. Surprise your family and friends with your masterpieces! If you dont know how to cook at all – go for it. Its an awesome way to get fitter, healthier and more creative at the same time. Get Musical Playing a musical instrument is a powerful tool of self-development. It engages your brain in a completely different way, makes you enhance motor skills, trains your ability to concentrate and does miracles to your creativity. Learn to Code HTML, Python or Java – learning at least basics of these is becoming a real necessity nowadays. If youre not particularly technically savvy – think of it as a challenge to your mind and at least give it a try. Teach Yourself a New Language †¦or get your environment do this. The times when mastering a language was possible only after hours of heavy staring into the textbooks are now far gone. Start small: switch the language settings on Facebook or watch your favorite TV-show with a foreign sound-track. Apply for an Internship Participating in an internship program has a number of positive sides to it: you get hands-on experience at a real workplace, build new connections and may even kick-start your soaring career. Theres plenty of ways to find a perfectly suitable internship: from talking to a career counsellor to consulting one of online resources. Start a Blog in case you havent got one yet. Its a great platform for self-expression and even for learning to make money online. If you do have one – update it regularly and document your summer. Do Volunteer Work Helping others makes you a better person. Whether you feel the need to improve your karma or simply want to learn more about life – volunteer work is a sure way to fulfill these purposes. Choose the one that matches your interests and go make your contribution. Get a Part-Time Job Job will surely take up lots of your time. Despite that, it is quite a rewarding experience. Meeting new people, trying yourself in a new role and getting paid, of course – thats just the top of an iceberg. Just do your best to pick something you really like. Enter Online Courses There are so many spheres of life were completely ignorant about! Luckily, theres a plenty of online courses to change the situation. Choose the subject youre particularly interested in and let the knowledge capture you. Do Couch Surfing Travel enriches you mind. Couch surfing lets you gain plenty of experience without wasting tons of money for it. In addition to saving yourself trouble of booking and pre-paying the hotels you get a chance to get to know local culture better via communication with the hosts. Find the Joy of Reading Instead of reading with purely educational purpose, in summer you can actually do it for fun. Choose the book youve chosen a while ago and read to your hearts content. In case you arent quite sure what to choose, check out the hottest reading list for summer or visit Goodreads and What Should I Read Next to make up your mind. Meditate Summer is a great opportunity to restore your energy supplies and refill the reservoir of your inner strength. Meditation will be of a great help here. With all the classes gone, youll definitely have more time for it. Dive Into Culture Being a student you get plenty of discounts to visit museums, galleries and other places, soaked in beauty and culture. Check out the opportunities in your area and start the quest for the art: the experience might be not just educating but also fun! Opt for Documentaries Think of the time youve spent binge-watching all the TV-shows. Imagine how much you could have learnt, if you watched documentaries instead? Why not try doing so? â€Å"No Fast Food† Weeks Thats a tough, though beneficial one. Set yourself a goal and stay out of the fast food restaurants. Youre sure to get healthier and more creative with your nutrition choices. Your body will be grateful for a change! Start a Fitness Challenge With the abundance of fitness channels on YouTube and inspiration accounts on Instagram, everyone will find something to their likings. Be persistent, dont give up and prepare to be proud: youll get fitter, slimmer and more disciplined. Whats not to like, right? Go On a Bicycle Tour Bicycle tours have plenty of advantages: thats the greenest way to travel, you get a chance to see more gorgeous places in addition to saving all the money for transport. If you dont have a bike – rent one and enjoy the journey. Start New, Good Habits We have all the powers to shape our personalities. Thats why forming new, useful habits is so exciting: with a bit of motivation and discipline you can carve out a better version of your current self. Clean the Clutter Feel the need to organize your mind? Clean you room then. The less cluttered the space you live in is, the less garbage there is in your head. Start now. The effect is really fascinating. Manage Your Money Do you always know where your money go? With a bit of free time and effort youll become a real personal finance guru. Subscribe to a couple of smart finance blogs or choose one of the digital tools to help you deal with your income and spendings in a more reasonable way. There you go. Feel free to invent your own ways of adding productivity to your summer. Youre the one setting the limits. Have an awesome one!