The answer for this question is D. Domestic (I am doing the same test and I chose D and got it correct :))
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Sinoatrial node part of the autonomic nervous system adjusts the heart rate and the arteriole diameter to regulate blood pressure through negative feedback
The SA (sinoatrial) node is generates an electrical signal that can causes the upper heart of the chambers (atria) to contract. The signal and then passes through the AV (atrioventricular) node to the lower of the heart chambers (ventricles), causing them to contract, or to pump. The SA node is considered the pacemaker of heart.
The sinus node continuously generates electrical impulses, thereby setting the normal rhythm and also rate in a healthy heart. Hence, the SA node is also referred to as the natural pacemaker of the heart
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The water level in the reservoir of an ice machine is maintained at the correct level of a float switch.
<h3>
What is a float switch?</h3>
- A level sensor of the kind used to measure the liquid level in a tank is a float switch.
- The switch can operate a pump, serve as an alert or indicator, or regulate other equipment.
- A float that elevates a rod to activate a microswitch is another typical form.
- A float holding a magnet surrounds and is steered by a reed switch set in a tube in one pattern.
- The float closes the reed switch by raising the magnet to it. One component can accommodate multiple reeds installed in the tube for various level indications.
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