The primary mechanism responsible for the closure of fetal ducts following birth is:
1. Suctioning of the nose and mouth.
2. The first breath of the infant.
3. High carbon dioxide levels.
4. Stimulation of the infant.
2
Feedback
1. Suctioning of the nose and mouth do not assist in closing the fetal ducts, but instead result in hypoxia.
2. The first breath by the infant results in higher oxygen levels and relaxation of the pulmonary artery. In turn, the pressure gradients within the heart change and force the fetal ducts to close.
3. High carbon dioxide levels would result in pulmonary vasoconstriction, which would not close the fetal ducts.
4. Stimulation of the infant may assist the infant in taking his/her first breath, but it is the first breath that assists in closing the fetal ducts.
You might also like to view...
A client tells the nurse that he is having difficulty sleeping. He says, "I don't want to use sleeping pills, but I'm thinking about getting some melatonin
" Which of the following is most important for the nurse to include in a response to the client? a. "Melatonin is an effective treatment for certain sleep disorders." b. "Melatonin appears to be a relatively safe sleep aid for most people." c. "You may experience some side effects, such as elevated blood pressure." d. "Before taking melatonin, you should consult your primary care provider."
A nurse is caring for a client with myasthenia gravis at a health care facility. The client is receiving ambenonium. The nurse suspects that the dosage is insufficient based on assessment of which of the following?
A) Clenching of the jaw B) Muscle spasms C) Difficulty breathing D) Abdominal cramping
What is the most appropriate approach to drug dosing with a corticosteroid when the patient doesn't have a life-threatening disease?
a. Start high and taper down if tremendous adverse effects occur. b. Start low and increase gradually until symptoms are controlled. c. Always start high, and do not taper. d. Always start low, and do not taper.
The newly admitted client has contractures of both lower extremities. What nursing intervention should be included in this client's plan of care?
1. Frequent position changes to reverse the contractures 2. Exercises to strengthen flexor muscles 3. Range of motion exercises to prevent worsening of contractures 4. Weight-bearing activities to stimulate joint relaxation