The nurse should respond BY APPLYING GENTLE PERINEAL PRESSURE.
Application of gentle perineal pressure will prevent the excessive rapid expulsion of the foetus head which can cause perineal laceration in the mother.
Chemical factors: This is due to internal stimuli. Changes in the blood such as decrease in O2, increase in CO2 and decrease in PH cause impulse in the carotid artery which stimulates the respiratory centers in the medulla and cause breathing.
Mechanical factors: also called external stimuli. Compression of the fetal chest during delivery forces small amount of lung fluid out of the lungs. This increase in pressure in the chest draws air into the lungs.
Amino acids speed up or slow down the chemical reactions of organisms
