Joints

Muscles and Joints

What is a joint?

A joint is the place where bones meet.​

Bones themselves cannot move but the muscles they are attached to by tendons can.

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​How do bones move?

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Fill in the Blanks

What is the organelle in a muscle cell that releases the energy needed for muscles to move?

• ​The bone acts like a hinge.

• ​180 degree movement possible.

• Movement only in one plane.​

​​Hinge Joint

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• ​Bone is shaped like a hemisphere.

• Allows movement in more than one plane.

• 360 degree movement.​

​​Ball and Socket Joint​

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​There are two main types of joints.

Multiple Select

Which of these is a ball and socket joint?

• elbow joint

• hip joint

• shoulder joint

• knee joint

Multiple Select

Which of these is a hinge joint?

• Hip joint

• Elbow joint

• Ball and socket joint

• Knee joint

Multiple Choice

Which joint is this?

• Fixed

• Ball and socket

• Hinge

Multiple Choice

Which joint is this?

• Ball and socket

• Hinge

• Fixed

Multiple Choice

Which joint is this?

• Shoulder joint

• Hip joint

• Knee joint

• Elbow joint

• ​Biceps contract.

• Triceps relax.​

​Raised arm​

• ​Biceps relax.

• Triceps contract.​

Lowered arm

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Antagonist muscles

Fill in the Blanks

What is the term used for muscles that cause an opposite effect on the other called?

Multiple Select

What happens when the arm is lowered?

• Biceps contract

• Biceps relax

• Triceps contract

• Triceps relax