Which is an inborn response? a. the type of food eaten b. an eating habit c. hunger d. appetite

Hunger

A discomfort felt in the body due to lack of nutrients is called hunger and this is an inborn response. When your stomach is empty, the wall of stomach starts contracting and then it starts stimulating nerve endings present in the wall of stomach.These nerve ending sends signal to the brain that the body needs nutrition.Then the body intakes food and once the stomach is full there is no stimulation of nerve and no signal to brain.The urge to take food stops until the stomach is hungry again.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.