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science study guide
| Question | Answer |
|---|---|
| Describe how your pulse changes after running. Why would this happen? | Your pulse rate goes up after exercise because your heart is beating faster. Your cells need more energy, so your heart beats faster to get oxygen and nutrients to your cells. |
| Describe what your pulse is. | The rate your heart is beating. You can feel this at your wrist or your neck. |
| If you increase your activity level for a period of months, how will your resting pulse change? | Your resting pulse rate should decrease after months of exercise |
| What is an important function of the respiratory system? What organs make up the respiratory system? | The respiratory system is in charge of exchanging gasses when we breathe in and out. We breathe in oxygen and exhale carbon dioxide. The major organs are the nose, mouth, trachea (windpipe), lungs and alveoli. |
| What causes blood to move around your body? | Your heart acts as a pump that moves blood from the heart to the rest of the body. |
| How many beats per minute does a typical heart beat? | 60 - 80 BPM |
| What is the function of the circulatory system? What are the organs that make it up? | Your circulatory system is in charge of moving the blood around your body. It is made up of blood vessels (veins, arteries and capillaries), heart, and blood cells |
| What are three things blood transports in the circulatory system? | Nutrients, oxygen, and carbon dioxide |
| Which blood vessels carry blood away from the heart? | arteries |
| Which blood vessels carry blood toward the heart? | veins |
| Which blood vessels are so small that oxygen and nutrients can pass between them and surrounding parts of the body? | Capillaries |
| Describe the process of getting oxygen from the air to the cells in your body. Follow the path from the mouth/nose to the cell. | We breath in oxygen through the nose and mouth, it goes down our windpipe to the alveoli in our lungs, from there it is transferred to your blood through capillaries and then pumped to the rest of the body by your heart. |
| Where can you find many capillaries in your body? | Around the alveoli in the lungs and on the villi in your small intestines |
| If you wanted to determine which of your friends could jump the furthest, what variable would you need to control? | Make sure they are starting from the same position Make sure neither has a running start Make sure they are both wearing the same type of shoes |
| Describe what BTB is, how it works and what it tells you. | BTB is an indicator that will turn from blue to yellow in the presence of carbon dioxide. |
| What gas is necessary to get energy from food? | oxygen |
| Why does your respiration rate increase with exercise? | Because you need more energy and therefore you need more oxygen to break down food. |
| Many respiratory diseases limit a person’s ability to exchange oxygen. One of these diseases is pneumonia, which causes the lungs to fill up with fluid. If you had this disease , how do you think it would affect your body’s function? | This would affect your lungs ability to take in oxygen which could make it hard to breathe and also make you tired because your breakdown of food for energy is affected also. |
| How do the digestive, circulatory, respiratory and nervous systems work together to keep you healthy? | Your digestive system breaks down food so that nutrients and sugars can enter your bloodstream and reach your cells. The oxygen you breathe travels to your lungs and is carried by your blood to all the cells in your body. Inside the cells, oxygen helps br |
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31green