CSCS CSCS: Structure & Function of Body System 5

Question 1

Which vertebral region has the greatest normal lordotic curve?

Accepted Answer

Cervical and lumbar

Answer

Both the cervical and lumbar regions exhibit a lordotic (anteriorly concave) curve, while the thoracic and sacral regions display kyphotic curves.

Question 2

An increase in stroke volume with no change in heart rate will result in:

Accepted Answer

Increased cardiac output

Answer

Cardiac output equals heart rate multiplied by stroke volume; if stroke volume increases while heart rate remains constant, cardiac output increases proportionally.

Question 3

Type IIa muscle fibers are often described as 'intermediate' because they:

Accepted Answer

Have moderate oxidative and glycolytic capacity

Answer

Type IIa fibers possess both aerobic (oxidative) and anaerobic (glycolytic) metabolic capacity, making them more fatigue-resistant than Type IIx but faster than Type I fibers.

Question 4

Which hormone secreted by the posterior pituitary increases water reabsorption in the kidney collecting duct?

Accepted Answer

Antidiuretic hormone (ADH)

Answer

ADH (vasopressin), released from the posterior pituitary, acts on aquaporin channels in the collecting duct to increase water reabsorption and concentrate urine.

Question 5

The VO2max of an athlete is 60 mL/kg/min. This value represents:

Accepted Answer

Maximal oxygen uptake relative to body mass

Answer

VO2max expressed in mL/kg/min represents the maximum volume of oxygen consumed per minute relative to body mass, and is the gold standard measure of cardiorespiratory fitness.

Certified Strength and Conditioning Specialist Practice Test

Certified Strength and Conditioning Specialist Practice Test

CSCS CSCS: Structure & Function of Body System 5