Muscle Anatomy and Function Quiz

Compare the location and function of smooth, cardiac, and skeletal muscles.

• Smooth muscles are found in the heart and help pump blood; cardiac muscles are in the digestive tract and aid in digestion; skeletal muscles are attached to bones and assist in movement.

• Smooth muscles are in the digestive tract and help with digestion; cardiac muscles are found in the heart and pump blood; skeletal muscles are attached to bones and assist in movement.

• Smooth muscles are attached to bones and assist in movement; cardiac muscles are in the digestive tract and aid in digestion; skeletal muscles are found in the heart and help pump blood.

• Smooth muscles are found in the heart and help pump blood; cardiac muscles are attached to bones and assist in movement; skeletal muscles are in the digestive tract and aid in digestion.

Describe the typical structure of a skeletal muscle.

• Skeletal muscles are composed of branched fibers with intercalated discs.

• Skeletal muscles consist of spindle-shaped fibers with a single nucleus.

• Skeletal muscles are made up of long, cylindrical fibers with multiple nuclei.

• Skeletal muscles are composed of short, striated fibers with a single nucleus.

Briefly describe the mechanism of muscle contraction.

• Muscle contraction occurs when actin and myosin filaments slide past each other, shortening the muscle fiber.

• Muscle contraction happens when calcium ions are released, causing the muscle to elongate.

• Muscle contraction is initiated by the breakdown of ATP, leading to muscle relaxation.

• Muscle contraction involves the expansion of muscle fibers due to increased blood flow.

Explain how muscles work together to produce movement.

• Muscles work together by contracting and relaxing in pairs, known as antagonistic pairs.

• Muscles produce movement by remaining in a constant state of contraction.

• Muscles work together by expanding and contracting simultaneously.

• Muscles produce movement by only contracting without any relaxation.

Describe the main types of movements produced by muscles.

• Muscles produce only rotational and twisting movements.

• Muscles produce flexion, extension, abduction, and adduction movements.

• Muscles produce only linear and circular movements.

• Muscles produce only upward and downward movements.

Which of the following is a criterion for naming muscles?

• Shape

• Color

• Temperature

• Density

What is one of the roots pertaining to the muscular system?

• Myo-

• Neuro-

• Cardio-

• Hemo-

Which of the following is a disorder that affects muscles?

• Muscular dystrophy

• Asthma

• Diabetes

• Hypertension

What does the abbreviation "EMG" stand for in relation to muscles?

• Electromyography

• Electrocardiography

• Electroencephalography

• Electrooculography

Which type of muscle is responsible for peristalsis?

• Smooth

• Cardiac

• Skeletal

• Voluntary