Skeletal & Muscular Systems Quiz

What are the four main types of bones found in the human body?

• Long, Short, Flat, Irregular

• Circular, Triangular, Square, Rectangular

• Hard, Soft, Medium, Brittle

• Upper, Lower, Middle, External

What is the primary function of muscles in the human body?

• To provide structure

• To protect internal organs

• To produce movement

• To store minerals

Which type of joint movement allows for a decrease in the angle between articulating bones?

• Extension

• Flexion

• Rotation

• Circumduction

During muscle contraction, what happens to the sarcomere length?

• It increases

• It decreases

• It remains the same

• It doubles

What is the outer layer of a bone called?

• Marrow

• Periosteum

• Endosteum

• Cortex

Which type of muscle is found in the heart?

• Smooth muscle

• Skeletal muscle

• Cardiac muscle

• Elastic muscle

What type of joint allows for rotation around its axis?

• Hinge joint

• Pivot joint

• Ball and socket joint

• Saddle joint

What is the role of calcium ions in muscle contraction?

• They activate enzymes that break down muscle fibers

• They bind to myosin, allowing it to attach to actin

• They trigger the release of energy from ATP

• They bind to troponin, causing a change that allows myosin to bind to actin

What is the main structural unit of compact bone?

• Osteon

• Osteocyte

• Osteoblast

• Osteoclast

Which muscle type is under involuntary control?

• Skeletal muscle

• Cardiac muscle

• Both Cardiac and Smooth muscle

• None of the above