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Questions and Answers
The human skeleton is made up of _____ bones.
206
What type of joint is found in the shoulder and hip?
The knee joint is an example of a ball and socket joint.
False
What are the two main functions of the skeletal system?
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Match the following simple machines to their examples:
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The bones that protect the brain are called the _____.
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Which type of pulley is fixed in position?
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A wedge is a simple machine used to split or cut objects.
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Explain how a first-class lever works and give an example from the human body.
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What type of bone protects the lungs and heart?
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Study Notes
Skeleton and Joints
- The human skeleton consists of 206 bones, providing structure and support.
- Joints are the connections between two bones; they allow for movement and flexibility.
- The cranium protects the brain, forming the upper part of the skull.
- Major joint types include ball and socket (e.g., shoulder and hip) and hinge joints (e.g., elbow and knee).
Simple Machines
- A lever is a rigid bar that pivots around a point known as the fulcrum.
- First-class levers have the fulcrum located between the effort and load (e.g., the neck).
- Second-class levers have the load positioned between the fulcrum and the effort (e.g., a wheelbarrow).
- Simple machines, like levers and pulleys, reduce the amount of effort needed to perform work.
Types of Pulleys
- Fixed pulleys do not move and change the direction of the force applied.
- Movable pulleys provide a mechanical advantage by reducing the effort needed to lift a load.
Functions of the Skeletal System
- The skeletal system serves two primary functions: providing support to the body and protecting vital organs.
- It also facilitates movement in conjunction with muscles.
True or False Statements
- Important statements about human anatomy and simple machines include:
- The knee joint is not a ball and socket joint; it is a hinge joint.
- A wheelbarrow exemplifies a second-class lever.
- Ribs are indeed part of the axial skeleton, which provides structure to the torso.
Examples and Applications
- A wedge, a type of simple machine, is used to split or cut objects.
- The action of the biceps lifting the forearm exemplifies a first-class lever in human physiology.
- Simple machines ease work efforts by allowing a smaller input force to generate a larger output force.
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Description
Prepare for your Science final term examination with this quiz designed for Standard V students. Test your knowledge on the human skeleton, levers, and other key concepts in Science. Ensure you attempt all questions for a comprehensive review!
