Nervous and hormonal regulations provide a very precise adaptation of the heart to the environment. For example, during physical work pulses from the

Heart regulation (neural and hormonal) [control]

Nervous and hormonal regulations provide a very precise adaptation of the heart to the environment. For example, during physical work pulses from the receptors, which the muscles and tendons have, enter the central nervous system, which controls heart’s operation. It enhances the flow of impulses to the heart via the sympathetic nerves. At the same time the blood adrenaline increases. The frequency and strength of heart rate increases and, therefore, muscle needs get satisfied with oxygen and nutrients.

Neural heart control

Heart work changes reflexively involving the nervous system. The impulses that arrive to it via the parasympathetic nerves relax and slow contraction, and those who pass via the sympathetic nerves, on the contrary, strengthen and increase the heart rate. Taken from http://worldofschool.org

Hormonal heart control

Hormonal (humoral) regulation of the heart is associated with the action of the adrenal gland hormone — epinephrine, calcium salts and other substances that enhance and increase heart rate. Opposite effect on rate has a potassium salt and some biologically active substances.

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  • What is the mechanism of the heart regulation?