Tag: biology

Biology Test on Vitamin And Nutrition







Biology Test on Vitamin And Nutrition
This video contains 37 Most Important biology objective test in 100 selected biology question which will be very useful for any competitive Exam. So must watch it. Here you will get biology for class 10 NCERT BASED. The language of the video will be bilingual means biology in Hindi and biology in English, on awill guru channel you will get full biology crash course . It will work like a biology booster and bytes.This video also covers biology diseases caused by vitamin deficiency. Here you will get biology expected question. It also provides biology gk tricks. awill guru provides the key point that how to learn biology in hindi biology kaise padhe kaise yaad karen. They are the biology lectures in English but explained in Hindi. So most of the biology mcq written in English and Explain in Hindi.It is just like a biology quiz and here you get biology revision. Awill guru is not a biology teacher but love to teach biology tricks in Hindi and English. It is a biology test question and answer series which you will get online and live.
this lecture of biology for competitive exam listed below:
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and for many more exams
Metabolism is a complex process that has a lot more going on than personal trainers and commercials might have you believe. Today we are exploring some of its key parts, including vital nutrients — such as water, vitamins, minerals, crabs, fats, and proteins — as well as how anabolic reactions build structures and require energy, while catabolic reactions tear things apart and release energy. Vitamins are the building blocks that keep our bodies running; they help build muscle and bone, capture energy, heal wounds and more. But if our body doesn’t create vitamins, how do they get into our system? awill guru describes what vitamins are, how they get into our bodies. A vitamin is an organic compound and a vital nutrient that an organism requires in limited amounts. An organic chemical compound (or related set of compounds) is called a vitamin when the organism cannot synthesize the compound in sufficient quantities, and it must be obtained through the diet; thus, the term “vitamin” is conditional upon the circumstances and the particular organism. For example, ascorbic acid (one form of vitamin C) is a vitamin for humans, but not for most other animal organisms. Supplementation is important for the treatment of certain health problems, but there is little evidence of nutritional benefit when used by otherwise healthy people.
Biology always plays a vital role in the competitive exams
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Vitamin C | Masterclass With Masterjohn 1.5







The role of vitamin C in the antioxidant defense system, its interaction with smoking and vitamin E, and how its chemistry, biochemistry, and physiology can help us understand its distribution and stability in natural foods.

Circulatory & Respiratory Systems – CrashCourse Biology #27







Hank takes us on a trip around the body – we follow the circulatory and respiratory systems as they deliver oxygen and remove carbon dioxide from cells, and help make it possible for our bodies to function.

Crash Course Biology is now available on DVD! http://dft.ba/-8bCC

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Table of Contents
1) Respiratory System 00:48
2) Simple Diffusion 00:55
3) Respiratory Anatomy 02:35
a) Trachea to Capillaries 03:10
4) Lung Function & Thoracic Diaphragm 04:37
5) Circulatory System 05:35
6) Circulatory Anatomy 05:54
a) Left Ventricle to Capillary Beds 06:50
b) Veins to Left Atrium 08:46
7) Endotherms & Ectotherms 09:20

References for this episode can be found in the Google document here: http://dft.ba/-3cHg

This video uses the following sounds from Freesound.org:
“00559 deep breathing 1.wav” by Robinhood76

crash course, crashcourse, biology, animals, oxygen, carbon dioxide, cellular respiration, circulatory system, respiratory system, circulation, respiration, heart, lung, artery, vein, pulmonary, simple diffusion, membrane, lungfish, larynx, trachea, bronchus, bronchiole, alveolus, capillary, blood, inhale, exhale, diaphragm, thoracic, pressure, breathing, breath, pump, red blood cell, four chambered heart, ventricle, muscle, aorta, vena cava, atrium, endotherm, ectotherm, hank green Support CrashCourse on Patreon: https://www.patreon.com/crashcourse

Glutathione Reductase, B Vitamins, and Glucose | Masterclass With Masterjohn 1.10







Glucose is the ultimate antioxidant. In this lesson, we look at how energy is transferred from glucose to the antioxidant system using the help of B vitamins, and discuss why a large range of carbohydrate intakes is likely to provide equivalent support to this pathway.

Suplemento de Vitamina C previne resfriado? | #InstanteBiotec 36







Durante o outono e inverno vemos muitos casos de gripes e resfriados, e provavelmente, alguém já te falou para tomar aqueles suplementos de vitamina C para evitá-los. Mas será que eles funcionam?
Se você gostou desse vídeo, clique em curtir e compartilhe! =D

Veja também:
Por que não temos remédios para tudo? http://bit.ly/25jY46h
Por que tomamos vacinas? http://ow.ly/Y8Zz9

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Música: Bensound – Energy

Referências:
Mendonça JS. Gripes e resfriados. Dráuzio Varella, 2015. http://bit.ly/2qdERZ6

Almendrala A. Sorry, your vitamin C megadose is basically useless. Huffington Post, 2017. http://bit.ly/2qdywNg

Office of Dietary Supplements. Vitamin C – Fact sheet for health professionals. National Institutes of Health, 2016. http://bit.ly/2qdwEV1

Hemilä H, Chalker E. Vitamin C for preventing and treating the common cold. Cochrane Database of Systematic Reviews 2013, Issue 1. Art. No.: CD000980. http://dx.doi.org/10.1002/14651858.CD000980.pub4

Ascom. Suplementos alimentares. Agência Nacional de Vigilância Sanitária, 2016. http://bit.ly/2phn6TD

Agência Nacional de Vigilância Sanitária. Portaria nº 32, de 13 de janeiro de 1998. Ministério da Saúde. http://bit.ly/2qdGVAk

Energy Considerations in Nutrition: BMR, RMR & Physical Activity – Nutrition | Lecturio







This video “Energy Considerations in Nutrition: BMR, RMR & Physical Activity” is part of the Lecturio course “Nutrition” ► WATCH the complete course on http://lectur.io/nutrition1

► LEARN ABOUT:
– Basal metabolic rate (BMR) and resting metabolic rate (RTR)
– Calculating BMR
– Factor in physical activity gives us TEE
– Calculating physical activity level (PAL)

► THE PROF:
Dr. Georgina Cornwall has taught a broad array of Biology courses at different U.S. universities, currently at the Colorado Mountain College in Aspen. Dr. Cornwall is an active promoter of hybrid teaching formats like online and interactive courses. Thus, she uses modern technology to engage her students in the diverse disciplines of biology – from Microbiology to Genetics.

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Energy Balance and Thermoregulation of Humans
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Electron Transport Chain ETC Made Easy







Electron Transport Chain ETC Made Easy

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GLYCOLYSIS : https://www.youtube.com/watch?v=8qij1m7XUhk

KREBS CYCLE : https://www.youtube.com/watch?v=ubzw64PQPqM&t=181s

Beta oxidation: https://www.youtube.com/watch?v=__jS-pjzb5k&t=5s

An electron transport chain (ETC) is a series of complexes that transfer electrons from electron donors to electron acceptors via redox (both reduction and oxidation occurring simultaneously) reactions, and couples this electron transfer with the transfer of protons (H+ ions) across a membrane. This creates an electrochemical proton gradient that drives the synthesis of adenosine triphosphate (ATP), a molecule that stores energy chemically in the form of highly strained bonds. The molecules of the chain include peptides, enzymes (which are proteins or protein complexes), and others. The final acceptor of electrons in the electron transport chain during aerobic respiration is molecular oxygen although a variety of acceptors other than oxygen such as sulfate exist in anaerobic respiration.

In chloroplasts, light drives the conversion of water to oxygen and NADP+ to NADPH with transfer of H+ ions across chloroplast membranes. In mitochondria, it is the conversion of oxygen to water, NADH to NAD+ and succinate to fumarate that are required to generate the proton gradient.
Complex I
In Complex I (NADH:ubiquinone oxidoreductase, NADH-CoQ reductase, or NADH dehydrogenase; EC 1.6.5.3), two electrons are removed from NADH and ultimately transferred to a lipid-soluble carrier, ubiquinone (Q). The reduced product, ubiquinol (QH2), freely diffuses within the membrane, and Complex I translocates four protons (H+) across the membrane, thus producing a proton gradient. Complex I is one of the main sites at which premature electron leakage to oxygen occurs, thus being one of the main sites of production of superoxide.
The pathway of electrons is as follows:

NADH is oxidized to NAD+, by reducing Flavin mononucleotide to FMNH2 in one two-electron step. FMNH2 is then oxidized in two one-electron steps, through a semiquinone intermediate. Each electron thus transfers from the FMNH2 to an Fe-S cluster, from the Fe-S cluster to ubiquinone (Q). Transfer of the first electron results in the free-radical (semiquinone) form of Q, and transfer of the second electron reduces the semiquinone form to the ubiquinol form, QH2. During this process, four protons are translocated from the mitochondrial matrix to the intermembrane space. [4] As the electrons become continuously oxidized and reduced throughout the complex an electron current is produced along the 180 Angstrom width of the complex within the membrane. This current powers the active transport of four protons to the intermembrane space per two electrons from NADH.
Complex II
In Complex II (succinate dehydrogenase or succinate-CoQ reductase; EC 1.3.5.1) additional electrons are delivered into the quinone pool (Q) originating from succinate and transferred (via flavin adenine dinucleotide (FAD)) to Q. Complex II consists of four protein subunits: succinate dehydrogenase, (SDHA); succinate dehydrogenase [ubiquinone] iron-sulfur subunit, mitochondrial, (SDHB); succinate dehydrogenase complex subunit C, (SDHC) and succinate dehydrogenase complex, subunit D, (SDHD). Other electron donors (e.g., fatty acids and glycerol 3-phosphate) also direct electrons into Q (via FAD). Complex 2 is a parallel electron transport pathway to complex 1, but unlike complex 1, no protons are transported to the intermembrane space in this pathway. Therefore, the pathway through complex 2 contributes less energy to the overall electron transport chain process.

Complex III
In Complex III (cytochrome bc1 complex or CoQH2-cytochrome c reductase; EC 1.10.2.2), the Q-cycle contributes to the proton gradient by an asymmetric absorption/release of protons. Two electrons are removed from QH2 at the QO site and sequentially transferred to two molecules of cytochrome c, a water-soluble electron carrier located within the intermembrane space. The two other electrons sequentially pass across the protein to the Qi site where the quinone part of ubiquinone is reduced to quinol. A proton gradient is formed by one quinol (2H+2e-) oxidations at the Qo site to form one quinone (2H+2e-) at the Qi site. (in total four protons are translocated: two protons reduce quinone to quinol and two protons are released from two ubiquinol molecules).

QH2 + 2 cytochrome c (FeIII) + 2 H+in → Q + 2 cytochrome c (FeII) + 4 H+out
When electron transfer is reduced (by a high membrane potential or respiratory inhibitors such as antimycin A), Complex III may leak electrons to molecular oxygen, resulting in superoxide formation.

-~-~~-~~~-~~-~-
CHECK OUT NEWEST VIDEO: “Nucleic acids – DNA and RNA structure ”

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The operating system of life – George Zaidan and Charles Morton







View full lesson: http://ed.ted.com/lessons/the-operating-system-of-life-george-zaidan-and-charles-morton

Humans, octopi and pine trees alike are all made up of cells, tiny but sophisticated systems that keep life going. Cells are almost like tiny factories run by robots, with the nucleus, DNA, proteins, lipids, and vitamins and minerals all playing critical roles. George Zaidan and Charles Morton lay out the blueprint of a cell and explain how biochemistry binds all life together.

Lesson by George Zaidan and Charles Morton, animation by Pew36 Animation Studios.

Nutrition – Course Preview | Lecturio







► WATCH the complete course on http://lectur.io/nutrition

► LEARN ABOUT:
– Functions of vitamins
– Biological foundations
– Calculate nutritional rates
– Nutrition during pregnancy
– Nutrition in older age

► THE PROF:
Dr. Georgina Cornwall has taught a broad array of Biology courses at different U.S. universities, currently at the Colorado Mountain College in Aspen. Dr. Cornwall is an active promoter of hybrid teaching formats like online and interactive courses. Thus, she uses modern technology to engage her students in the diverse disciplines of biology – from Microbiology to Genetics.

► LECTURIO is your single-point resource for medical school:
Study for your classes, USMLE Step 1, USMLE Step 2, MCAT or MBBS with video lectures by world-class professors, recall & USMLE-style questions and textbook articles. Create your free account now: http://lectur.io/nutrition

► INSTALL our free Lecturio app
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Play Store: https://app.adjust.com/b01fak

► READ TEXTBOOK ARTICLES related to this video: http://lectur.io/nutritionlib

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WHY Exercise is so Underrated (Brain Power & Movement Link)







Exercise is good for the heart and makes you look good. However, there are much more compelling reasons to exercise regularly.
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The human brain is an exceedingly complex organ, and while we don’t fully understand it, it is what we have to use to understand and interact with the world around us. Research is showing that there is a very powerful connection between the nervous system and movement. Exercise has been shown to facilitate the growth of new neurons, paving the way for greater intelligence.

If this was interesting, I highly recommend checking out John Ratey’s “Spark: The Revolutionary New Science of Exercise and the Brain” http://amzn.to/2iZEttT

0:00 Exercise’s crappy and unfair marketing
2:23 Why do we have brains?
4:39 More exercise = Better Test Scores
5:21 BDNF – “Miracle Gro” for the Brain
6:36 Our human body: The IF THEN system
8:10 Arnold Schwarzenegger, productivity genius
8:44 Brain’s reward center & Dopamine
10:45 Exercise alleviates depression & anxiety
11:30 Exercise alleviates the negative effects of stress
13:15 How can improving your life in virtually every way not be at the top of your to-do list?

For Business Inquiries: joseph.everett.wil@gmail.com