While preparing for her class presentation, Brittney drinks 10 cups of coffee. What would be the impact on her stroke volume, heart rate and mean arterial pressure

Caffeine caused significant increase in the mean systolic

blood pressure (60 minutes post ingestion) from 116.6 to 128.3

mmHg as compared to placebo conditions. The mean rate

increased from 72.9 to 77.3 Bpm in test group. No change was

observed in control group.

Explanation:

Coffee does raise blood pressure in people who are not used to it but not in regular coffee drinkers; youngsters appear more sensitive to coffee. And the hypertensive effects of coffee seem to depend on ingredients other than caffeine. Habitual coffee drinkers become acclimated to these ingredients so their pressures don't rise more than a point or two, but people who are not used to coffee can expect a temporary rise in their pressures after drinking regular or decaf.

teens need 8-10 hours of sleep. it kind of depends on what time you get up. but prob around 10 or 11 p.m. or 11 or 11: 30 p.m.