The remains relatively unchanged throughout childhood.However, after age 25, it typically decreases by __________.
Cardiac output is a function of heart rate and stroke volume.In children, why is heart rate higher at rest and during exercise?
The increases as a result of physical training in elderly persons.This occurs for all of the following reasons EXCEPT __________.
The total number of muscle fibers is fixed at an early age, but __________.
Strenuous exercise can predispose children to which of the following?
The C-shaped cartilages of the trachea allow all of the following to occur EXCEPT __________.
