Regarding the Development of the Respiratory System, Maternity Nurses Should

question 9

Multiple Choice

Regarding the development of the respiratory system, maternity nurses should be aware that:

• A) The respiratory system does not begin developing until after the embryonic stage.
• B) The infant's lungs are considered mature when the lecithin/sphingomyelin (L/S) ratio is 1:1, at about 32 weeks.
• C) Maternal hypertension can reduce maternal-placental blood flow, accelerating lung maturity.
• D) Fetal respiratory movements are not visible on ultrasound scans until at least 16 weeks.

---

Definitions:

Inflationary Price Increase

The rise in prices of goods and services over time, typically due to an increase in the money supply or demand outpacing supply.

Reconciled

The process of making sure that two sets of records (usually the balances of two accounts) are in agreement.

Step-fixed Costs

Costs that remain fixed over a range of activity, but jump to a higher level of expense at certain points when activity levels require it.

Variable Cost

Costs that vary directly with the level of production output or business activity, such as materials and labor directly involved in producing a product.