(the way that you feel when pressure is placed on you).
(an emotion in which a person feels anxious or concerned about a real
or imagined issue).
and strange situations.
(a normal reaction to stress).
in sympathetic nervous system stimulation causes the heart rate to
of the sympathetic branch of the autonomic nervous system prepares
the body for emergencies: for "fight or flight".
via the cardiac beta-1 receptors causes the heart rate to increase.
of the beta-1 receptor include:
-Increase atrial cardiac muscle contractility
stimulate cardiac contractility through beta(1).
are sympathomimetic "fight-or-flight" hormones that are
released by the adrenal glands in response to stress.