Musculoskeletal System Quiz

What is the musculoskeletal system responsible for in the human body?

• Digestion

• Movement

• Respiration

• Circulation

How many bones are there in the human skeletal system?

• 206

• 305

• 150

• 500

What is the role of calcium in the bones?

• It provides energy for movement.

• It helps in the digestion of food.

• It reinforces the bones.

• It contracts and relaxes muscles.

How many muscles are there in the human body?

• Over 300

• Over 400

• Over 500

• Over 600

What happens when the brain signals a muscle to contract?

• The muscle lengthens and relaxes.

• The muscle shortens and tightens.

• The muscle detaches from the bone.

• The muscle becomes rigid and immovable.

What are the two types of muscles that work in pairs to move the body?

• Flexors and extensors

• Adductors and abductors

• Levators and depressors

• Pronators and supinators

What is the function of the biceps muscle?

• It is an extensor.

• It is a flexor.

• It is an abductor.

• It is an adductor.

What is the microscopic structure within muscle fiber that shortens to cause muscle contraction?

• Muscle fiber bundles

• Myofibril

• Sarcomere

• Actin and myosin

What are the two types of protein filaments that interact in the sarcomere to cause muscle contraction?

• Myosin and actin

• Collagen and elastin

• Keratin and myoglobin

• Hemoglobin and insulin

What allows for greater freedom of movement in areas like the shoulder joint?

• The presence of a single large muscle

• The attachment of many different muscles

• The absence of muscle tissue

• The rigidity of the skeletal structure