Anatomy, Physiology, and Biomechanics Quiz

Which type of muscle fiber is most resistant to fatigue?

• Type I

• Type IIa

• Type IIx

• Type IIb

What is the function of the sinoatrial (SA) node?

• Increases heart rate

• Stimulates muscle contraction

• Initiates the heartbeat

• Controls blood pressure

Which of the following is not a function of the skeletal system?

• Protection

• Hematopoiesis

• Hormone production

• Support

Which movement occurs at the hip during the upward phase of a squat?

• Flexion

• Extension

• Abduction

• Rotation

Which joint type allows the greatest range of motion?

• Hinge

• Saddle

• Pivot

• Ball and socket

What is tidal volume?

• Air left in lungs after exhalation

• Air inhaled in a deep breath

• Air exchanged per breath

• Total lung capacity

Which structure prevents backflow of blood in the heart?

• Atrium

• Valve

• Ventricle

• Septum

Which energy system provides ATP most rapidly?

• Aerobic system

• Glycolytic system

• ATP-PC system

• Krebs cycle

During inspiration, which muscles contract?

• Diaphragm and external intercostals

• Internal intercostals and diaphragm

• Abdominals and diaphragm

• Diaphragm only

Which of these best describes isometric contraction?

• Muscle shortens

• Muscle lengthens

• Muscle changes length under tension

• Muscle stays the same length under tension