Muscular System

Which of the following is NOT a function of the muscular system?

• Generate heat

• Produce movement

• Maintain posture

• Ossification

What cordlike structure can the epimysium blend into?

• ligaments

• fascia

• tendons

• aponeuroses

What is a sarcomere?

• A compartment in a myofilament

• The area between two intercalated discs

• The wavy lines on a the cell, as seen in a microscope

• The contractile unit between two Z discs

Which type of muscle tissue contracts most quickly upon stimulation?

• Visceral

• Smooth

• Skeletal

• Cardiac

Which of the following can actually shorten during a muscle contraction?

• Sarcomere

• Myosin filament

• Actin filament

• Myofilament

What does anaerobic glycolysis not require to occur?

• Oxygen

• Carbon dioxide

• Glucose

• ATP

Tags

NGSS.HS-LS2-3

Which type of contraction produce movements by muscles shortening?

• Isotonic contractions

• Isometric contractions

• Twitches

• Resistance exercises

Which of the following is the opposite movement to extension?

• Flexion

• Rotation

• Circumduction

• Adduction

What is a motor unit?

• A motor neuron and all of the skeletal muscle fibers it stimulates

• A contractile unit of a muscle fiber

• The tissue that surrounds the muscle fiber

• The junction between the muscle cell and neuron

How is muscle fatigue best described?

• The inability to generate sufficient quantities of ATP due to feedback regulation of synthesis

• A total lack of ATP

• Insufficient intracellular quantities of ATP due to excessive consumption

• Inadequate numbers of mitochondria

Tags

NGSS.HS-LS1-7