Biology > QUESTIONS & ANSWERS > Gizmos Muscles and Bones Student Exploration | Complete Q&A (All)

Gizmos Muscles and Bones Student Exploration | Complete Q&A

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Gizmos Muscles and Bones Student Exploration | Complete Q&A Name: Date: Student Exploration: Muscles and Bones Vocabulary: actin, biceps, cartilage, contract, extend, fast twitch fiber, flex, ful ... crum, humerus, lever, ligament, muscle fiber, myofibril, myosin, powerstroke, radius, sarcomere, skeletal muscles, slow twitch fiber, tendon, triceps, ulna Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. When you lift a weight, what part of the arm is doing the most work? biceps 2. How do you think your arm muscles cause your forearm bones to move? Muscles move by contracting against the skeleton and becoming shorter, so they pull on the bones and allow the body to move Gizmo Warm-up In the Muscles and Bones Gizmo, you will learn about the anatomy of the arm. You will build an arm model, then test its ability to lift a dumbbell and throw a ball. You will see how making adjustments to the arm can affect its ability to lift and throw. To begin, make sure you are on the ANATOMY tab, the entire arm is shown, and no circles are open. Select Hide muscles. Click Play. 1. Describe what the arm bones are doing. Its moving up towards the bicep and then back down 2. Turn off Hide muscles and turn on Show labels. Describe what the biceps and triceps are doing as the forearm moves up and down. They stretch and then relase. This study source was downloaded by 100000856694432 from CourseHero.com on 11-11-2022 13:36:15 GMT -06:00 https://www.coursehero.com/file/79124948/Muscles-and-Bones-gizmo-completeddocx/ 2019 Activity A: Muscle anatomy Get the Gizmo ready:  Make sure the ANATOMY tab is selected and no circles are open. Introduction: Your arm contains muscles, bones, and other connective tissue. When muscles contract, they pull on the bones, causing them to move. In this activity, you will learn what causes muscles to contract. Question: What causes muscles to contract? 1. Observe: Turn on Hide muscles and Show labels. A. Which bone connects the shoulder to the forearm? humerus B. What are the names of the two forearm bones? Radius and ulna 2. Observe: Note the white connective tissue along the elbow. Cartilage reduces friction between bones. Examine the ligament. A. Ligaments connect bones to bones . B. Turn off Hide muscles. Inspect the tendons. Tendons join bones to muscles. 3. Explore: Click Play. Observe the muscles as the forearm moves up and down. A. When the arm flexes (bends upward), which muscle contracts? biceps B. Which muscle relaxes when the arm flexes? biceps C. When the arm extends (straightens), which muscle contracts? triceps D. Which muscle relaxes when the arm extends? triceps E. Why do muscles work in pairs? They can only pull each other, not push, so when one contracts, the other does the opposite to straighten the joint. 4. Observe: Click on the biceps to see a close-up of the muscle. A. What is the muscle made of? Muscle fibers [Show More]

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