The nurse is conducting an early pregnancy class for a group of pregnant women. Which statement indicates a need for further education about the placenta?
1. "It develops and grows larger until about 20 weeks' gestation."
2. "It floats in the amniotic sac and filters waste products from the fetus."
3. "It creates hormones and enzymes that are necessary during pregnancy."
4. "It ages and becomes less permeable during the last month of pregnancy."
2
Explanation:
1. The chorionic villi of the placenta become more differentiated with time. The placenta grows in size until about 20 weeks. After this point, the placenta thickens but does not increase in size.
2. The placenta is attached to the uterine wall, and does not float in the amniotic sac. One function of the placenta is to filter metabolic waste products from the baby's blood so that they can be excreted by the mother.
3. The placenta creates glycogen, cholesterol, hormones such as human chorionic gonadotropin (hCG), and enzymes such as sulfatase and insulinase.
4. The placenta is designed to last for 40 weeks, the average length of human gestation. The permeability to nutrients and oxygen begins to decrease starting at about 36 weeks as a part of the aging of the placenta.
You might also like to view...
Which type of validity is demonstrated by administering a test in which all items relate to wound care, and then evaluating student performance in caring for patients with wounds in the clinical setting?
a. Face validity b. Content validity c. Construct validity d. Criterion-related validity
As a rule of thumb, the estimated level of hematocrit is how many times the value of the hemoglobin?
a. Two b. Three c. Four d. Five
Immediate interventions for a patient with a sucking chest wound include: Note: Credit will be given only if all correct choices and no incorrect choices are selected. Select all that apply
1. Administer pain medication. 2. Continue to monitor pulse oximetry and respiratory characteristics. 3. Prepare for emergency intubation. 4. Prepare the patient for chest tube insertion. 5. Apply a dressing that is taped on three sides.
Which of the following statements about exercise is true?
a. People who engage in high-intensity exercise are at lowest risk for illness. b. Aerobic exercise should be part of daily exercise routines. c. Regular exercise may cause people to experience fatigue and increased susceptibility to mental health disorders. d. Low-level physical activity may have a protective effect on gastric and pancreatic cancer.