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Q What substance is secreted by Pneumocyte type-II cells?

ID: #10008 Respiratory system 157 views
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#10008Q ID
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Respiratory systemTopic
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  • A Actin ✔ ✖
  • B Lecithin ✔ ✖
  • C Mucous ✔ ✖
  • D Lysine ✔ ✖
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Explanation

Pneumocyte type-II cells are located in the alveoli of the lungs and are responsible for secreting a substance called lecithin. Lecithin acts as a surfactant, which helps reduce surface tension in the alveoli, preventing them from collapsing during exhalation. Without this surfactant, the alveoli would collapse and cause difficulty in breathing. Pneumocyte type-I cells are responsible for gaseous exchange in the lungs.

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