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physioex 6: activity 2 questions and answers rated A+ 2024/2025
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physioex 6: activity 2 questions and answers rated A+ 2024/2025
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physioex 6: activity 2the effect of the parasympathetic nervous system on the heart is to... - ANSdecrease the heart
rate
the branch of the autonomic nervous system that dominates during exercise is.. -
ANSsympathetic branch
parasympathetic stimulation reaches the heart through - ANSvagus nerves, which are cranial
nerves
the usual pacemaker of the heart - ANSsinoatrial node
what do you think will happen if you apply multiple stimuli to the heart indirectly stimulating the
vagus nerve - ANSthe heart rate will decrease
the vagus nerve carries.. - ANSsignals that decrease the heart rate
the response that resumed the heartbeat after the vagus nerve stimulation is called - ANSvagal
escape
extreme vagus nerve stimulation affects the heart by.. - ANSstopping the heart completely
vagal escape probably involves.. - ANSsympathetic reflexes
research shows that, in the absence of neural and hormonal influences, the SA node generates
action potentials at a frequency of approximately 100 times per minute. However, the resting
rate is approx 70 beats per/min, which suggests that? - ANSthe parasympathetic nervous
system has more control over heart rate
the SA (sinoatrial) node in the human heart is located.. - ANSin the right atrium
explain the effect that extreme vagus nerve stimulation had on the heart - ANSwith extreme
vagal stimulation the heart rate will slow down due to a slower rate of rise during phase 4 of the
pacemaker potential and a decrease in the conduction of action potentials within the cardiac
muscle
explain to ways the heart can overcome excessive vagal stimulation - ANS1) an ectopic
pacemaker to resume the heart rate
2) increase SNS activity
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