Which of the following is required in order for homeostasis to be maintained? Select one:

An organism should be able to move to a new environment when conditions change.

There should be a constant input of stimuli to receptors so that internal conditions remain constant.

An organism should have an internal environment that differs from its external environment.

Passage of materials across cell membranes need to occur at a continuously rapid rate.

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.

which