Musculoskeletal System Summary Handout

Which of the following is NOT a key area covered in Unit 4?

• A) Components of fitness

• B) Lifestyle factors

• C) Fitness testing

• D) Cooking techniques

Answer explanation

Cooking techniques are not covered in Unit 4, which focuses on components of fitness, lifestyle factors, and fitness testing. Therefore, D) Cooking techniques is the correct answer.

Fill in the blank: The skeletal system provides your body's framework, providing ______ and protection.

• structure

• energy

• digestion

• movement

Answer explanation

The skeletal system provides your body's framework, giving it structure and protection. The correct choice, 'structure', emphasizes the role of bones in supporting the body, unlike the other options which do not relate to this function.

The pelvis supports the trunk and connects to the legs.

• True

• False

Answer explanation

The statement is true because the pelvis indeed supports the trunk and serves as a connection point for the legs, playing a crucial role in the body's structure and movement.

What is the main function of the muscular system?

• Responsible for movement, posture, and heat production.

• Regulates the body's hormones and metabolism.

• Filters waste from the blood and produces urine.

• Transports oxygen and nutrients throughout the body.

Answer explanation

The muscular system is primarily responsible for movement, maintaining posture, and generating heat, making it essential for physical activity and overall body function.

Which type of muscle is voluntary and attached to bones, responsible for conscious movement?

• Cardiac Muscle

• Smooth Muscle

• Skeletal Muscle

• Erector Spinae

Answer explanation

Skeletal muscle is the type of muscle that is voluntary and attached to bones, allowing for conscious movement. Unlike cardiac and smooth muscles, which are involuntary, skeletal muscles enable us to control our movements.

Which type of muscle is found in the walls of internal organs such as the stomach and intestines?

• Skeletal Muscle

• Cardiac Muscle

• Smooth Muscle

• Hamstrings

Answer explanation

Smooth muscle is found in the walls of internal organs like the stomach and intestines, allowing for involuntary movements. Unlike skeletal and cardiac muscle, smooth muscle is not striated and functions automatically.

Which muscle is known as the calf muscle and is responsible for plantarflexing the foot (pointing toes down)?

• Gastrocnemius

• Biceps brachii

• Deltoid

• Trapezius

Answer explanation

The gastrocnemius is the primary muscle in the calf, responsible for plantarflexing the foot, which means it helps point the toes downward. The other options do not perform this function.

Which muscle group is responsible for flexing the leg at the knee and is located at the back of the thigh?

• Hamstrings

• Quadriceps

• Gastrocnemius

• Deltoids

Answer explanation

The hamstrings are a group of muscles located at the back of the thigh, responsible for flexing the leg at the knee. The quadriceps are located at the front of the thigh, while the gastrocnemius is in the calf, and deltoids are shoulder muscles.

Which muscle is responsible for shrugging the shoulders and extending the neck?

• Trapezius

• Biceps brachii

• Rectus abdominis

• Gastrocnemius

Answer explanation

The trapezius muscle is primarily responsible for shrugging the shoulders and extending the neck. It plays a key role in moving and stabilizing the shoulder blades.

Which bone protects the brain?

• Skull

• Femur

• Rib

• Pelvis

Answer explanation

The skull is the bone structure that encases and protects the brain from injury. Other options like the femur, rib, and pelvis serve different functions in the body and do not provide protection for the brain.