The following is the 1st respiratory reflex which helps in the first breath of newborn
**Core Concept**
The first breath of a newborn is facilitated by respiratory reflexes that help initiate breathing. The **respiratory system** and its control mechanisms are crucial for this process.
**Why the Correct Answer is Right**
Although the options are missing, typically, the first respiratory reflex in a newborn is related to the initiation of breathing after birth, which involves the **laryngeal chemoreflex** or other mechanisms that stimulate the first breath. However, without the specific options, we can infer that the correct answer likely involves a reflex that responds to the change in environment from the womb to the outside world, such as the **stimulation of the nasal and oral areas** which can trigger the first breath.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details, we can't directly address why each option is incorrect, but generally, incorrect options might involve reflexes or mechanisms not directly related to the initiation of the first breath.
**Option B:** Similarly, this option would be incorrect if it doesn't directly relate to the immediate respiratory reflex needed for the first breath.
**Option C:** This option might be incorrect if it refers to a reflex or mechanism that is not the primary initiator of the first breath.
**Option D:** This could be incorrect if it doesn't accurately describe the first respiratory reflex.
**Clinical Pearl / High-Yield Fact**
The first breath of a newborn is crucial and is facilitated by reflexes that help expand the lungs and initiate breathing. Remembering that the transition from fetal to neonatal circulation and the initiation of breathing are critical for neonatal survival is key.
**Correct Answer:** D. First respiratory reflex helps in the first breath of newborn