02-24-2007, 07:15 AM
You are watching an ill-tempered child that threatens to hold her breath until her wishes are fulfilled. You say "go ahead" whereupon the child takes a deep breath, holds it, and stares back at you defiantly. The child is incredibly willful, and to your alarm, she passes out in front of you. You rush to the child and discover that
a. her heart rate is low and her pulses are weak, from lack of oxygen
b. her heart rate is fast and her pulses are bounding, from baroreceptor-mediated sympathetic activation
c. her heart rate is normal because the baroreceptors kept her blood pressure up the whole time
d. none of the above
a. her heart rate is low and her pulses are weak, from lack of oxygen
b. her heart rate is fast and her pulses are bounding, from baroreceptor-mediated sympathetic activation
c. her heart rate is normal because the baroreceptors kept her blood pressure up the whole time
d. none of the above