An intubated term infant with severe meconium aspiration syndrome has persistent oxygen requirements despite appropriate lung expansion and ventilation. Why might surfactant improve respiratory function?

What is the effect of stimulating beta- receptors in the heart?

BONUS: Provide the universal number of the tooth in this picture. Note: This question will be manually graded once the assessment closes. Partial credit will not be awarded. 

A preterm infant born after maternal fever and prolonged rupture of membranes develops early respiratory distress. The chest radiograph shows low lung volumes, diffuse granular opacities, and air bronchograms. What is the most appropriate approach?

Drugs and their metabolites can be eliminated through pathways other than renal excretion. Which process involves the excretion of a drug through the biliary system into the gastrointestinal tract, followed by its reabsorption back into systemic circulation?

A spontaneously breathing preterm infant receiving CPAP develops increasing grunting and oxygen requirements. The interface is correctly positioned and delivering the prescribed pressure. Chest radiography shows low lung volumes, and perfusion remains adequate. What adjustment best addresses the underlying physiologic problem?

Which of the following drugs should be limited in patients taking Propranolol (Inderal)?

After successful lung recruitment on HFOV, an infant’s PaCO₂ falls below the prescribed target. Lung expansion, oxygenation, and perfusion remain appropriate. What adjustment most directly reduces excessive CO₂ removal?

A newborn has a high-pitched breathing sound that is most prominent during inspiration and becomes louder with feeding and supine positioning. Which location does this pattern most strongly suggest?

The Universal Gravitational Constant (G) is given by 6.67×10−116.67\times10^{-11}N m2/kg2. Two objects have masses of 3.0 kg and 8.0 kg and are separated by a distance of 1.0 m. What is the gravitational force between them in terms of G? (For example: If you get a value of 5 after the math without including the G value, then just write it as 5G. You need not include the value of G in your calculations.)