Correct Answer: D

Rationale: Direct contact transmission occurs when pathogens are spread through skin-to-skin contact or body fluids. This mode of transmission includes activities like touching, kissing, or sexual contact where infectious agents can pass directly from one person to another. It does not involve large aerosols, suspended air particles, or dust as carriers of the pathogen.

Correct Answer: A

Rationale: Short stature in growing children can result from anterior pituitary gland hypofunction, which leads to growth hormone deficiency. The anterior pituitary gland plays a crucial role in stimulating the release of growth hormone, and when it is underactive (hypofunction), insufficient growth hormone is produced, resulting in short stature and slow growth rates.

Correct Answer: C

Rationale: When managing a pediatric patient with asthma, the nurse needs to be vigilant about potential complications. While cor pulmonale, respiratory arrest, and respiratory failure are known complications of asthma, respiratory distress is not typically considered a direct complication. Respiratory distress is more of a symptom or a sign of worsening asthma, indicating the need for immediate intervention to prevent progression to more severe complications.

Correct Answer: A

Rationale: The function of producing new offspring is not attributed to hormones. Hormones primarily regulate various physiological processes in the body such as growth, metabolism, reproduction, and immune response, but they do not directly play a role in producing offspring.

Correct Answer: D

Rationale: All the listed conditions, central cyanosis, respiratory rate >70 breaths per minute, and grunting on assessment, are indicative of the need for oxygen therapy. Central cyanosis suggests severe hypoxemia, a respiratory rate >70 breaths per minute can indicate respiratory distress, and grunting is a sign of increased work of breathing. Administering oxygen in these situations can help improve oxygenation and support the child's respiratory function, making option D the correct choice.