breathing/hyperventilation

Question 1

where is the cardiovascular regulating center?

Answer 1

medulla oblongata

Question 2

describe the voluntary control of breathing

Answer 2

• somatic control
• cerebral cortex
• allows us to hold our breath, and increase/decrease the speed we breathe

Question 3

describe hyperventilation

Answer 3

• rapid, deep breathing
• removal of CO2 & intake of too much O2
• triggered by conscious control or under physical stress
• corrected when chemoreceptors for CO2 conc are no longer stimulated

Question 4

why is hyperventilation dangerous before swimming?

Answer 4

• allows a person underwater due to loss of carbon dioxide NOT an increase in oxygen
• individual loses consciousness from lack of oxygen to the brain before feeling the urge to breathe