are no numbers for the first question but there are for the second.
or flight response is a general discharge of the sympathetic nervous
nervous system increases heart rate.
healthy reading of blood pressure is 120/80 mm Hg and an average healthy
heart rate 60 BPM o beats per minute.
healthy people there is no good correlation between pulse rate and
temperature, age, sex, and prior physical condition modify the correlation
between blood pressure and heart rate.
abnormal cardiac rhythms (Atrial fibrillation, Ventricular tachycardia)
a very high pulse rate causes a fall in blood pressure because the
heart muscle is not contracting in the usual coordinated way to be
an effective pump.
kinds of activity affect blood pressure differently.
nervous system and its sympathetic arm play important roles in the
regulation of blood pressure.
sympathetic nerve activity (MSNA) after arousal stimuli (eg, startling
the subject with a loud noise) either does not change or falls for
a few bursts in some subjects, and MSNA can fall during mental stress
(Donadio V, Kallio M, Karlsson T, Nordin M, and Wallin BG).
subjects with high levels of baseline MSNA, a relatively low value
for cardiac output (CO) would offset the influence of higher sympathetic
nerve activity and vascular resistance.
men, there is an inverse relationship between MSNA and CO.
relationship helps explain why blood pressure is not consistently
higher in subjects with high levels of MSNA.
large group of men and women <40 years of age, no relationship
between MSNA and mean arterial pressure was seen by Narkiewicz et
in older men there was a modest relationship between MSNA or sympathetic
nerve activity and blood pressure.
positive relationship was more pronounced in the older women.
older subjects free of coexisting disease, there is a rise in sympathetic
activity with aging.
of the increased sympathetic activity with aging, the relationship
between MSNA and blood pressure remains modest in older men.
and weight gain are conditions associated with increased MSNA or Muscle
sympathetic nerve activity after arousal stimuli
find the answer to the second question at:
increase in blood pressure per increase in heart rate during an increase
in physical activity
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