Your heart is the organ involved in the pulse rate.
Chronotropes increase the human heart rate, sometimes by changing the rhythm of the sinoatrial node. Negative chronotropes decrease the heart rate.
The risks involved with having heart surgery are endless, and there is no real way to identify all the risks involved. A few of the risk are: bleeding, abnormal heart rate,Ischemic heart damage, death, blood clots, stroke, and blood loss.
The transmitter that affects neurons involved in increased heart rate is norepinephrine. Released by the sympathetic nervous system, norepinephrine binds to adrenergic receptors in the heart, leading to an increase in heart rate and contractility. This response is part of the "fight or flight" mechanism, preparing the body for heightened physical activity.
Biofeedback
The heart beats faster in smaller organisms because they have a higher metabolic rate and need more oxygen and nutrients to sustain their bodies compared to larger organisms. This results in a faster heart rate to circulate blood efficiently.
A prominent class of motor neurons in the sympathetic nervous system are involved with vasoconstriction also with an increase in the heart rate.
Dual innervation refers to an organ receiving input from both the sympathetic and parasympathetic divisions of the autonomic nervous system. This allows for precise regulation of the organ's function by balancing the effects of these two opposing systems. Examples include the heart receiving both sympathetic stimulation (increasing heart rate) and parasympathetic stimulation (slowing heart rate).
The limbic system itself does not directly control heart rate; however, it plays a significant role in regulating emotional responses that can influence autonomic functions, including heart rate. The parasympathetic nervous system, which is part of the autonomic nervous system, is responsible for decreasing heart rate. Emotional states processed by the limbic system, such as relaxation or calmness, can activate the parasympathetic system, leading to a decrease in heart rate. Thus, while the limbic system is involved in the emotional aspects that can affect heart rate, it does not directly produce a decreased heart rate.
By keeping fit means being physically active I would say your joints and muscles because of the movement,your heart to promote a healthy blood flow to pump you blood and speed up your heart rate to burn calories,and the liver because it helps to rid the body of harmful toxins.
It is a machine that detects changing in blood pressure, heart rate and other body rhythems to detect false statements.
The autonomic reflex is involved in controlling involuntary bodily functions such as heart rate, digestion, and respiratory rate. It helps maintain homeostasis by responding to changes in the internal and external environment without conscious effort.