Understanding Joints and Muscle Movement

What type of joint allows for rotational movement?

• Ball-and-socket joint

• Hinge joint

• Saddle joint

• Pivot joint

Which joint is an example of a hinge joint?

• Wrist joint

• Elbow joint

• Hip joint

• Shoulder joint

How many degrees of freedom does a ball-and-socket joint have?

• 4

• 3

• 1

• 2

What is the primary function of hinge joints?

• To enable gliding movements between bones

• To provide stability and support for weight

• The primary function of hinge joints is to allow movement in one direction, enabling flexion and extension.

• To allow rotation in multiple directions

Name a muscle that helps flex the elbow.

• triceps brachii

• biceps brachii

• pectoralis major

• deltoid

What is the role of the triceps muscle at the elbow?

• The triceps muscle stabilizes the elbow.

• The triceps muscle rotates the elbow.

• The triceps muscle extends the elbow.

• The triceps muscle flexes the elbow.

How do muscles work in pairs to move the arm?

• Muscles only contract to move the arm.

• Muscles work in pairs by contracting and relaxing to facilitate movement.

• Muscles work independently without pairs.

• Muscles push the arm away from the body.

What happens to the biceps when the arm is straightened?

• The biceps remain unchanged.

• The biceps become stronger.

• The biceps contract and shorten.

• The biceps relax and lengthen.

Which joint connects the upper arm to the forearm?

• Shoulder joint

• Elbow joint

• Wrist joint

• Knee joint

What type of movement does a ball-and-socket joint allow?

• Multidirectional movement including rotation

• Limited movement in one plane

• No movement at all

• Unidirectional movement only