Nervous & Muscular

Which type of muscle is responsible for involuntary contractions of the digestive tract and blood vessels?

• Skeletal muscle

• Smooth muscle

• Cardiac muscle

Which muscle type is under conscious control and is responsible for voluntary movements like walking and picking up objects?

• Skeletal muscle

• Smooth muscle

• Cardiac muscle

Which of the following is not a function of muscles in the human body?

• Movement

• Protection of internal organs

• Regulation of blood sugar levels

• Maintenance of posture and body position

Which of the following is a protein that plays a key role in muscle contraction by sliding along myosin filaments to shorten muscle fibers?

• Collagen

• Elastin

• Actin

• Keratin

What is the primary energy source for muscle contraction during short bursts of intense activity, such as sprinting or weightlifting?

• Glucose

• Oxygen

• ATP (adenosine triphosphate)

• Creatine

What type of muscle movement involves the movement of a limb away from the midline of the body?

• Adduction

• Abduction

• Flexion

• Extension

Which muscle movement involves decreasing the angle between two bones, typically bending a joint?

• Abduction

• Adduction

• Flexion

• Extension

What is the deepest layer of muscle tissue that surrounds individual muscle fibers?

• Epimysium

• Perimysium

• Endomysium

• Fascia

Which muscle layer surrounds bundles of muscle fibers, grouping them into fascicles?

• Epimysium

• Perimysium

• Endomysium

• Fascia

What is the connective tissue layer that surrounds the entire muscle and separates it from surrounding tissues?

• Epimysium

• Perimysium

• Endomysium

• Fascia