Joints and Muscles

What are the three main types of joints?

• Elastic, Rigid, Flexible

• Hinge, Ball-and-Socket, Pivot

• Fixed, Movable, Rotational

• Fibrous, Cartilaginous, Synovial

Which type of joint allows for the greatest range of motion?

• Pivot joint

• Saddle joint

• Hinge joint

• Ball-and-socket joint

What is the function of a hinge joint?

• The function of a hinge joint is to allow movement in one plane, enabling flexion and extension.

• To allow rotation in multiple directions

• To provide stability and support

• To enable gliding movements between bones

Name a location in the body where a ball-and-socket joint is found.

• Shoulder joint

• Elbow joint

• Knee joint

• Wrist joint

What type of joint is found in the skull?

• Hinge

• Ball-and-socket

• Pivot

• Sutures

Describe the process of muscle contraction in simple terms.

• Muscle contraction is the shortening of muscle fibers due to the sliding of actin and myosin filaments.

• Muscle contraction occurs when blood flows into the muscles.

• Muscle contraction is the process of muscle fibers relaxing and lengthening.

• Muscle contraction involves the stretching of muscle fibers.

What is the role of calcium in muscle contraction?

• Calcium ions inhibit the interaction between actin and myosin.

• Calcium ions facilitate muscle contraction by enabling the interaction between actin and myosin.

• Calcium plays no role in muscle contraction and is only important for bone health.

• Calcium is primarily responsible for energy production in muscles.

What is the name of the protein that pulls on actin during muscle contraction?

• troponin

• tropomyosin

• myosin

• actin

How do muscles work in pairs?

• Muscles work in pairs by only contracting together.

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

• Muscles work in pairs by pushing against each other without relaxing.

• Muscles work in pairs by relaxing simultaneously.

What is the difference between voluntary and involuntary muscles?

• Voluntary muscles are found only in the heart.

• Voluntary muscles are controlled consciously, while involuntary muscles function automatically.

• Involuntary muscles can be controlled at will.

• Voluntary muscles are responsible for digestion.