Problem 2 - Biology: The Dynamic Science

Question

Which of the following describes a respiratory surface? a. a surface consisting of multiple layers of epithelial cells b. the exoskeleton of an insect c. the nasal passages of a mammal d. a thin surface consisting of a single layer of epithelial cells e. the outer membrane of a mitochondrion.

Step-by-Step Solution

Answer

The respiratory surface is described by option d) a thin surface consisting of a single layer of epithelial cells.

Step 1: Understanding the concept of a respiratory surface

Respiratory surfaces are specialized areas in an organism's body where gases such as oxygen and carbon dioxide are exchanged. For this exchange to be efficient, a respiratory surface should be thin, to minimize the barrier for gas exchange, and moist, because gases must first dissolve in a wet surface to then diffuse across a membrane.

Step 2: Examining the given options

Now let's analyze the answer options considering the properties of a respiratory surface we have. a) A respiratory surface is not made up of multiple layers of epithelial cells. b) The exoskeleton of an insect is not a site for gas exchange. c) Although the nasal passages of a mammal are involved in the respiratory system, they are not the actual site of gas exchange. d) A 'thin surface consisting of a single layer of epithelial cells' aligns well with our understanding of a respiratory surface. e) The outer membrane of a mitochondrion, while important for the process of respiration at the cellular level, is not a 'respiratory surface' for the exchange of gases.

Step 3: Selecting the correct option

Option d) 'A thin surface consisting of a single layer of epithelial cells' aligns with the understanding of a respiratory surface as it allows efficient gas exchange.