Before preparing a teaching plan for the parents of an infant with patent ductus arteriosus, it is important that the nurse understands this condition. Which statement best describes patent ductus arteriosus?A. Patent ductus arteriosus involves a defect that results in a right-to-left shunting of blood in the heart. B. Patent ductus arteriosus involves a defect in which the fetal shunt between the aorta and the pulmonary artery fails to close. C. Patent ductus arteriosus is a stenotic lesion that must be surgically corrected at birth. D. Patent ductus arteriosus causes an abnormal opening between the four chambers of the heart.

B. Patent ductus arteriosus involves a defect in which the fetal shunt between the aorta and the pulmonary artery fails to close.

Explanation:

Ductus arteriosus is an artery that is function only during fetal stage. It bypasses the non-functional fluid filled lungs while taking flood from the right ventricle . It joins the pulmonary artery to the descending aorta. Normally this artery closes after birth.

If it fails to close then it results in patent ductus arteriousus that causes abnormal blood flow and a part of oxygenated blood flows back into the pulmonary artery from aorta.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.