TED Talks - آموزش زبان

🔴Does Stress Affect Your Memory? #TED_Ed #Health #Memory 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

📕کانال دریافت کتابها و منابع آزمون آیلتس. توصیه شده برای داوطلبین آزمون در تمامی سطوح. ♦️عضویت رایگان👇👇 https://t.me/joinchat/AAAAAEwcBjgWyJ1Rm3PLqQ www.bestielts.ir

🔴A Mother And Son's Photographic Journey Through Dementia #TEDx #Aging #Family #Parenting_Alzheimer #Humanity #Art #Love #Life #Photography 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴What would happen if you didn't drink water? Water is virtually everywhere, from soil moisture and ice caps, to the cells inside our own bodies. Depending on factors like location, fat index, age, and sex, the average human is between 55-60% water. At birth, human babies are even wetter. Being 75% water, they are swimmingly similar to fish. But their water composition drops to 65% by their first birthday. So what role does water play in our bodies, and how much do we actually need to drink to stay healthy? The H20 in our bodies works to cushion and lubricate joints, regulate temperature, and to nourish the brain and spinal cord. Water isn't only in our blood. An adult's brain and heart are almost three quarters water. That's roughly equivalent to the amount of moisture in a banana. Lungs are more similar to an apple at 83%. And even seemingly dry human bones are 31% water. If we are essentially made of water, and surrounded by water, why do we still need to drink so much? Well, each day we lose two to three liters through our sweat, urine, and bowel movements, and even just from breathing. While these functions are essential to our survival, we need to compensate for the fluid loss. Maintaining a balanced water level is essential to avoid dehydration or over-hydration, both of which can have devastating effects on overall health. At first detection of low water levels, sensory receptors in the brain's hypothalamus signal the release of antidiuretic hormone. When it reached the kidneys, it creates aquaporins, special channels that enable blood to absorb and retain more water, leading to concentrated, dark urine. Increased dehydration can cause notable drops in energy, mood, skin moisture, and blood pressure, as well as signs of cognitive impairment. A dehydrated brain works harder to accomplish the same amount as a normal brain, and it even temporarily shrinks because of its lack of water. Over-hydration, or hyponatremia, is usually caused by overconsumption of water in a short amount of time. Athletes are often the victims of over-hydration because of complications in regulating water levels in extreme physical conditions. Whereas the dehydrated brain amps up the production of antidiuretic hormone, the over-hydrated brain slows, or even stops, releasing it into the blood. Sodium electrolytes in the body become diluted, causing cells to swell. In severe cases, the kidneys can't keep up with the resulting volumes of dilute urine. Water intoxication then occurs, possibly causing headache, vomiting, and, in rare instances, seizures or death. But that's a pretty extreme situation. On a normal, day-to-day basis, maintaining a well-hydrated system is easy to manage for those of us fortunate enough to have access to clean drinking water. For a long time, conventional wisdom said that we should drink eight glasses a day. That estimate has since been fine-tuned. Now, the consensus is that the amount of water we need to imbibe depends largely on our weight and environment. The recommended daily intake varies from between 2.5-3.7 liters of water for men, and about 2-2.7 liters for women, a range that is pushed up or down if we are healthy, active, old, or overheating. While water is the healthiest hydrator, other beverages, even those with caffeine like coffee or tea, replenish fluids as well. And water within food makes up about a fifth of our daily H20 intake. Fruits and vegetables like strawberries, cucumbers, and even broccoli are over 90% water, and can supplement liquid intake while providing valuable nutrients and fiber. Drinking well might also have various long-term benefits. Studies have shown that optimal hydration can lower the chance of stroke, help manage diabetes, and potentially reduce the risk of certain types of cancer. No matter what, getting the right amount of liquid makes a world of difference in how you'll feel, think, and function day to day. #Health #Public_Health #Water #TED_Ed #Animation #Biology #Physiology #Human_Body #Science 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴What would happen if you didn't drink water? #Health #Public_Health #Water #TED_Ed #Animation #Biology #Physiology #Human_Body #Science 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴Who counts as a speaker of a language #Language #Culture #TEDx #Society #Education 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴What makes muscles grow? Muscles. We have over 600 of them. They make up between 1/3 and 1/2 of our body weight, and along with connective tissue, they bind us together, hold us up, and help us move. And whether or not body building is your hobby, muscles need your constant attention because the way you treat them on a daily basis determines whether they will wither or grow. Say you're standing in front of a door, ready to pull it open. Your brain and muscles are perfectly poised to help you achieve this goal. First, your brain sends a signal to motor neurons inside your arm. When they receive this message, they fire, causing muscles to contract and relax, which pull on the bones in your arm and generate the needed movement. The bigger the challenge becomes, the bigger the brain's signal grows, and the more motor units it rallies to help you achieve your task. But what if the door is made of solid iron? At this point, your arm muscles alone won't be able to generate enough tension to pull it open, so your brain appeals to other muscles for help. You plant your feet, tighten your belly, and tense your back, generating enough force to yank it open. Your nervous system has just leveraged the resources you already have, other muscles, to meet the demand. While all this is happening, your muscle fibers undergo another kind of cellular change. As you expose them to stress, they experience microscopic damage, which, in this context, is a good thing. In response, the injured cells release inflammatory molecules called cytokines that activate the immune system to repair the injury. This is when the muscle-building magic happens. The greater the damage to the muscle tissue, the more your body will need to repair itself. The resulting cycle of damage and repair eventually makes muscles bigger and stronger as they adapt to progressively greater demands. Since our bodies have already adapted to most everyday activities, those generally don't produce enough stress to stimulate new muscle growth. So, to build new muscle, a process called hypertrophy, our cells need to be exposed to higher workloads than they are used to. In fact, if you don't continuously expose your muscles to some resistance, they will shrink, a process known as muscular atrophy. In contrast, exposing the muscle to a high-degree of tension, especially while the muscle is lengthening, also called an eccentric contraction, generates effective conditions for new growth. However, muscles rely on more than just activity to grow. Without proper nutrition, hormones, and rest, your body would never be able to repair damaged muscle fibers. Protein in our diet preserves muscle mass by providing the building blocks for new tissue in the form of amino acids. Adequate protein intake, along with naturally occurring hormones, like insulin-like growth factor and testosterone, help shift the body into a state where tissue is repaired and grown. This vital repair process mainly occurs when we're resting, especially at night while sleeping. Gender and age affect this repair mechanism, which is why young men with more testosterone have a leg up in the muscle building game. Genetic factors also play a role in one's ability to grow muscle. Some people have more robust immune reactions to muscle damage, and are better able to repair and replace damaged muscle fibers, increasing their muscle-building potential. The body responds to the demands you place on it. If you tear your muscles up, eat right, rest and repeat, you'll create the conditions to make your muscles as big and strong as possible. It is with muscles as it is with life: Meaningful growth requires challenge and stress. #Health #Public_Health #Human_Body #Health_care #TED_Ed #Animation #Biology #Physiology #Exercise #Science #Food 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴What makes muscles grow? #Health #Public_Health #Human_Body #Health_Care #TED_Ed #Animation #Biology #Physiology #Exercise #Science #Food 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴An interview with the founders of Black Lives Matter #Activism #Collaboration #Community #Communication #Gender_Equality #History #Humanity #Identity #Inequality #Immigration #Media #Race #Poverty #Social_Change #Social_Media #Society 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔻لیست کلیه كانالهاى ما👇👇 ✅كانال آموزش زبان و آيلتس: @BestIELTS ---------------------------------‐------------------------ ✅کانال دریافت منابع آزمون: @Best_EnglishSources ---------------------------------‐------------------------ ✅پیج اینستاگرام: http://instagram.com/Bestielts.ir ---------------------------------‐------------------------ ✅تست تعیین سطح: https://bit.ly/replacement_test ---------------------------------‐--------------------- ✅کانال داستانهای کوتاه انگلیسی: @Best_EnglishStories ---------------------------------‐------------------------ ✅کانال پادكست: @BestIELTS_Podcast ---------------------------------‐------------------------ ✅کانال سخنرانی های TED: @TEDTalksLearning ---------------------------------‐------------------------ ✅وبسایت رسمی بست آیلتس: www.bestielts.ir ---------------------------------‐------------------------ ✅تست سنجش لغت: https://bestielts.ir/vocabulary-testing/ ---------------------------------‐----------------------

🔴The Bug That Poops Candy This is Mabel. Mabel is an aphid, a small insect in the same order as cicadas, stink bugs, and bed bugs. All these bugs pierce their prey and suck out vital fluids. Aphids’ prey are plants. And what aphids are after is buried within the plant, flowing in tubes made from single cells strung end-to-end. These are called sieve tubes and together they form the plumbing system for a plant’s most valuable resource: sap. Sap is mostly water and sugar. Some species’ sap has as much sugar per liter as a can of soda. Photosynthesis is constantly producing sugar. You can think of it as a chemical “pump” which generates incredibly high pressure— up to 9 times that of a car tire— in the sieve tubes. To feed, Mabel uses her stylet, which is a long, flexible needle. She slowly worms it into the tissue, between the plant’s cells, until she pierces one of those sieve tubes. Because the sap is under so much pressure, Mabel doesn’t even have to suck it out of the plant. She just opens a valve in her head and lets the pressure push the sap through her digestive system. We’ll come back to what comes out of her butt, but for now, you should know that plants don’t want to be punctured and sipped. So they try to defend themselves. One defense is the sap itself. To see how that works, let’s hypothetically hook up some other insect’s digestive tract to a steady stream of sap. When that sap touches the insect’s cells, its high sugar content encourages the water in the cells to come out by osmosis… exactly like salt encourages water to come out of a slug. The more sap that passes through the insect, the more water it loses. Eventually, it shrivels up and dies. Mabel’s gut, however, is packed with an enzyme called sucrase, which takes two molecules of sucrose and converts them into one molecule of fructose and one of… this three-unit sugar. Mabel burns the fructose for energy, leaving the three-unit-sugar behind. Now, how does that help her? The more molecules of sugar that are dissolved in the sap, the more water it can suck out of Mabel’s cells. By reducing the number of molecules of sugar in the sap, Mabel reduces its ability to suck water out of her cells. Plant sap neutralized. Now that means Mabel can feed for days, getting all the energy she needs to reproduce. Some aphid species have an incredible life cycle. For example, the green peach aphid. During the fall, males and females mate, and the females lay eggs. But in the spring, when the eggs hatch, all the nymphs that emerge are female. When those females reach maturity, they don’t lay eggs. Instead, they give birth to live young… that are clones of themselves… and already pregnant… with their own clones. So, these female aphids have two generations of baby aphid clones forming inside themselves at the same time. Scientists call this telescopic development. That means that aphids can make more of themselves fast— there can be 20 generations within a single season— and that means lots of aphid poop. Mabel can poop her entire body weight every two hours, making her one of the most prolific poopers on the planet. Some aphid populations can produce hundreds of kilograms of poop per acre. Now, aphid poop is not like your poop. Chemically, it’s not all that different from sap; it’s a clear and colorless sweet, syrupy liquid. You might already know it by a different name: honeydew. Other species love honeydew. Some species of ants love it so much they sort of herd and defend entire aphid colonies. In return, the ants get a steady supply of sweet honeydew, which they can drink directly from the aphids’ butts. Bottom’s up! Humans love honeydew, too. Several Native American tribes used to harvest it from tall reeds and make it into cake. And some species of bee make honey from honeydew, which humans then harvest and eat. #Education #TED_Ed #Animation #Insects #Biology #Plants #Nature #Food 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴The Bug That Poops Candy #Education #TED_Ed #Animation #Insects #Biology #Plants #Nature #Food 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴آیلتس چیست؟ [همه چیز از 0 تا 100 آزمون آیلتس] 🔻واژه IELTS مخفف ۵ کلمه ی International English Language Testing System به معنای سیستم بین المللی ارزیابی زبان انگلیسی می باشد. آیلتس معتبرترین آزمون بین المللی سنجش زبان انگلیسی است که ...  📃 ادامه مطلب Join ➣ @BestIELTS www.bestielts.ir

🔴What to trust in a post-truth world #Politics #TEDx #Social_Media #Personal_Growth #Society #Data #Trust #Statistics #Science #Journalism #Psychology 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴لغات موضوعی آیلتس برای تقویت اسپیکینگ و رایتینگ با تلفظ در لینک زیر👇👇 https://bit.ly/ielts_vocab Join ➣ @BestIELTSHub ☜عضويت www.bestielts.ir

🔴Why Do We Kiss Under Mistletoe #History #Animation #Plants #TED_Ed #Education #Biology #Culture 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

کتاب فوق العاده عالی برای تقویت گرامر جهت آزمون آیلتس دانلود با لینک مستقیم👇👇 http://bit.ly/cambridge-grammar Join ➣ @BestIELTS ☜عضويت

🔴Scenes from a Black trans life #Gender #Race #Gender_Spectrum #Transgender #Social_Change #History #TEDx 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴تست تعیین سطح زبان ویژه متقاضیان آیلتس و کلیه سطوح تنها در ۲۰ دقیقه با کلیک بر روی لینک زیر آزمون رو انجام بده و لینک رو برای دوستانت هم ارسال کن.👇👇 https://bit.ly/replacement_test http://t.me/joinchat/AAAAAENPs6PsrL7BHtQBEQ ☜عضويت www.bestielts.ir