Outer Space by https://padlet.com/lv3067/iihx23dcvrhb By:Lesley VanDrongelen en-us 2018-05-15 14:35:56 UTC 2026-01-24 03:30:39 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Rocket.png How do astronauts train on land for the environments they will encounter in space? lv3067 https://padlet.com/lv3067/iihx23dcvrhb/wish/260875077 Astronauts will be submerged in a water tank, 63 feet underwater, for weeks at a time. They do this to simulate group isolation and they carry out experiments and training exercises in a program called NEEMO-NASA Extreme Environment Mission Operation. They scuba dive down to the facility and once inside the dry chamber, breathe pressurized air for the entire stay. This means that their bodies become fully loaded with nitrogen, and they are unable to return safely to the surface without first decompressing for over 16 hours. Since scuba diving makes them essentially weightless, the astronauts can practice the skills needed to go on spacewalks. Isolation underwater also trains them to focus on complex tasks while maintain cautious awareness of the hostile environment surrounnding them. There are also techniques they can learn when they are doing oceanographic work because it simulates how to map the surface of planets (pages 237-238). ]]> 2018-05-15 14:38:55 UTC https://padlet.com/lv3067/iihx23dcvrhb/wish/260875077 Explain the effect of increasing G forces on the human body. lv3067 https://padlet.com/lv3067/iihx23dcvrhb/wish/260969025 At 2G your face droops, and your internal organs begins to shift. 3G the liquids in your body become hard to lift and they pool in your legs, and your heart has a hard time pumping them up to your head. One more G and your vision dims because the blood flow to your eyes has diminished to a trickle. If the Gs continues to mount, flow to your eyes will completely stop and your vision will go black. If a few more Gs are added, blood flow will stop to your brain, and making you go unconscious. What blood your heart does manage to distribute around your body will not contain the same amount of oxygen. Your lungs are also suffering. Your trachea has been flattened. The alveoli in the lower part of your lungs have broken under pressure, allowing air to escape before it can be transferred to your blood. Though your upper alveoli are still intact, the increased weight of your blood prevents it from reaching them. Your kidneys can't filter enough blood to make urine. The compressive pressure on your spine is so severe that the fluid-filled discs separating and cushioning the vertebrae are in danger of exploding (pages 244-245). ]]> 2018-05-15 18:17:07 UTC https://padlet.com/lv3067/iihx23dcvrhb/wish/260969025 Explain the effects a no-gravity environment has on the human body systems. lv3067 https://padlet.com/lv3067/iihx23dcvrhb/wish/260976068 Your head is used to being tipped backwards, but when you get into orbit your head falls forwards, making you feel like you're sitting on your head. Your internal organs have become buoyant.  The aorta and carotid arteries interpret the intensified blood pressure as an overload and signal for the kidneys to filter out more fluid to the bladder in compensation. Your decreased blood volume has concentrated red blood cells, and your body's response of destroying them for balancing levels makes you anemic and tired. Also, your heart has to work less because of decreased volume of blood needed for pumping, so it will lose muscle strength and shrink in size. (247-248) ]]> 2018-05-15 18:33:25 UTC https://padlet.com/lv3067/iihx23dcvrhb/wish/260976068 What are the perils of walking outside the space vehicle? How can an astronaut protect the body from these hazards? lv3067 https://padlet.com/lv3067/iihx23dcvrhb/wish/261384942 The spacesuit you are wearing must protect you from the vacuum of space, insulate you from temperatures that are 200 degrees below or above fahrenheit. It also has to provide you with oxygen supply and handle carbon dioxide removal and protect you from any haphazard micrometer strikes. It also has to be flexible enough to allow you to mount solar panels, install cameras, and repair who knows what. (253)]]> 2018-05-16 20:53:54 UTC https://padlet.com/lv3067/iihx23dcvrhb/wish/261384942 How do astronauts deal with the accumulation of expelled carbon dioxide? What happens if the gas is not regulated? lv3067 https://padlet.com/lv3067/iihx23dcvrhb/wish/261386405 Canisters of lithium hydroxide are needed to "wash" the carbon dioxide out of the air. When the carbon dioxide gets too high you're breathing rate will increase. At toxic levels, your breathing becomes very rapid and shallow, which is too inefficient to get adequate air into the lungs. (258).  ]]> 2018-05-16 21:02:26 UTC https://padlet.com/lv3067/iihx23dcvrhb/wish/261386405 Explain how the body regulates normal sleep patterns. Why would this pattern be disrupted in space. lv3067 https://padlet.com/lv3067/iihx23dcvrhb/wish/261388537 Normally the pineal gland releases the sleep-inducing hormone melatonin is response to the gradual onset of darkness. When up in space the sun rises every 90 minutes and confuses your pineal gland. The excitment of being up in space makes you not feel tired and you don't want to waste time sleeping. (255-256]]> 2018-05-16 21:14:28 UTC https://padlet.com/lv3067/iihx23dcvrhb/wish/261388537 Explain why exercise is necessary in space. lv3067 https://padlet.com/lv3067/iihx23dcvrhb/wish/261389774 Because of the lack of gravity, your muscles and bones will start to weaken. Muscles will atrophy and you could develop osteoporosis if your bones aren't put to work. (265)]]> 2018-05-16 21:21:39 UTC https://padlet.com/lv3067/iihx23dcvrhb/wish/261389774 Write and justify what you believe to be the "Top 5" Rules for staying healthy on a space mission. lv3067 https://padlet.com/lv3067/iihx23dcvrhb/wish/261395618 1) Get enough sleep so you can stay healthy and not be exhausted.
2) Do not rip your suit, otherwise you will most likely die because that suit keeps you alive. 
3) Exercise regularly!! Have to keep muscles moving so they don't atrophy and so your bones can stay strong. 
4) Do not get bored. Bring games or something to entertain yourself with so you can stay energized. 
5) Stay hydrated and eat food so your body can have energy to do the missions you are assigned to do. ]]> 2018-05-16 21:56:04 UTC https://padlet.com/lv3067/iihx23dcvrhb/wish/261395618 You are able to bring one average sized backpack with you on your expedition in space. Explain what you would pack and why. lv3067 https://padlet.com/lv3067/iihx23dcvrhb/wish/261396653 I would pack many pictures of my family, so I won't get sad and I could see their smiling faces. I would also bring my own blanket, so I feel like I'm at home and I could sleep better. I would also bring a deck of cards for something to do when I am bored. Lastly I would bring my own camera to take amazing pictures to show my friends and family. ]]> 2018-05-16 22:04:47 UTC https://padlet.com/lv3067/iihx23dcvrhb/wish/261396653