Exploring the Functions of the Muscular System

The video provides an overview of the muscular system, explaining the roles of skeletal, cardiac, and smooth muscles. It details the functions of different muscle types, including voluntary and involuntary movements, and highlights the importance of muscle proteins like myosin and actin. The video also covers specific muscle groups in the head, neck, chest, abdomen, back, arms, hands, legs, and feet, emphasizing their roles in movement, posture, and stability.

How many muscles are there in the human body?

• 500

• 600

• 700

• 800

Which type of muscle is responsible for skeletal movement?

• Cardiac muscle

• Smooth muscle

• Skeletal muscle

• Involuntary muscle

What type of skeletal muscle is best for endurance activities?

• Fast twitch

• Slow twitch

• Cardiac

• Smooth

Which muscle type is controlled by involuntary movements and is found in the heart?

• Skeletal muscle

• Smooth muscle

• Cardiac muscle

• Fast twitch muscle

Where can you find smooth muscles in the body?

• In the walls of hollow organs

• In the brain

• In the heart

• Attached to bones

What is the role of myosin in muscle contraction?

• It stores energy

• It connects bones to skin

• It controls a specific movement

• It relaxes the muscle

Tags

NGSS.MS-LS1-2

What is the name of the myofibril unit that contains myosin and actin?

• Sarcomere

• Myofiber

• Tendon

• Ligament

Which muscle helps the shoulder joint move in different directions?

• Biceps brachii

• Latissimus dorsi

• Rectus abdominus

• Pectoralis major

What muscle group is located in the front of the thigh and is the leanest and strongest in the body?

• Quadriceps

• Biceps

• Calf muscles

• Hamstrings

Which muscles work together to flex and extend the upper arms?

• Flexor carpi radialis and flexor digitorum superficialis

• Latissimus dorsi and rectus abdominus

• Quadriceps and hamstrings

• Brachialis, biceps brachii, and brachioradialis