Name: Date:
.
Student Exploration: Muscles and Bones
Vocabulary: actin, biceps, cartilage, contract, extend, fast twitch fiber, flex, fulcrum, 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? The Biceps
2. How do you think your arm muscles cause your forearm bones to move?
The biceps and triceps work together. 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 and 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.
The biceps and the triceps are the ones who do most of the work.
This study source was downloaded by 100000842568006 from CourseHero.com on 05-06-2022 04:16:36 GMT -05:00
2019
https://www.coursehero.com/file/85331138/MusclesBonesSE-2-1docx/
, Get the Gizmo ready:
Activity A:
Make sure the ANATOMY tab is selected and no
Muscle anatomy
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?
The Humerus
B. What are the names of the two forearm bones?
The ulna and radius
2. Observe: Note the white connective tissue along the elbow. Cartilage reduces friction
between bones. Examine the ligament.
A. Ligaments connect bones to Others Bones . .
B. Turn off Hide muscles. Inspect the tendons. Tendons join bones to triceps.
.
3. Explore: Click Play. Observe the muscles as the forearm moves up and down.
A. When the arm flexes (bends upward), which muscle contracts?
The flexor
B. Which muscle relaxes when the arm flexes?
The Biceps
C. When the arm extends (straightens), which muscle contracts?
The Triceps
D. Which muscle relaxes when the arm extends?
The 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..
This study source was downloaded by 100000842568006 from CourseHero.com on 05-06-2022 04:16:36 GMT -05:00
2019
https://www.coursehero.com/file/85331138/MusclesBonesSE-2-1docx/
.
Student Exploration: Muscles and Bones
Vocabulary: actin, biceps, cartilage, contract, extend, fast twitch fiber, flex, fulcrum, 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? The Biceps
2. How do you think your arm muscles cause your forearm bones to move?
The biceps and triceps work together. 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 and 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.
The biceps and the triceps are the ones who do most of the work.
This study source was downloaded by 100000842568006 from CourseHero.com on 05-06-2022 04:16:36 GMT -05:00
2019
https://www.coursehero.com/file/85331138/MusclesBonesSE-2-1docx/
, Get the Gizmo ready:
Activity A:
Make sure the ANATOMY tab is selected and no
Muscle anatomy
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?
The Humerus
B. What are the names of the two forearm bones?
The ulna and radius
2. Observe: Note the white connective tissue along the elbow. Cartilage reduces friction
between bones. Examine the ligament.
A. Ligaments connect bones to Others Bones . .
B. Turn off Hide muscles. Inspect the tendons. Tendons join bones to triceps.
.
3. Explore: Click Play. Observe the muscles as the forearm moves up and down.
A. When the arm flexes (bends upward), which muscle contracts?
The flexor
B. Which muscle relaxes when the arm flexes?
The Biceps
C. When the arm extends (straightens), which muscle contracts?
The Triceps
D. Which muscle relaxes when the arm extends?
The 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..
This study source was downloaded by 100000842568006 from CourseHero.com on 05-06-2022 04:16:36 GMT -05:00
2019
https://www.coursehero.com/file/85331138/MusclesBonesSE-2-1docx/
