Question

question 2
air is filtered, humidified, and adjusted to body temperature in the:
trachea
lungs
alveoli
bronchi
question 3
which of the following statements regarding carbon dioxide is false:
it is a by - product of energy metabolism.
it moves from tissue into blood via active transport by special protein channels.
it plays an important role in the bodys defense against changes in acidity.
it binds with hemoglobin to form a compound called carbaminohemoglobin.

Explanation:

For Question 2: The nasal cavity is the main site where air is filtered, humidified, and adjusted to body - temperature before reaching the trachea, bronchi, alveoli and lungs. But among the given options, the trachea is the first major airway after the upper respiratory tract structures that perform these initial air - conditioning functions.
For Question 3: Carbon dioxide moves from tissue into blood via simple diffusion, not active transport by special protein channels. It is a by - product of energy metabolism, plays a role in acid - base balance, and binds with hemoglobin to form carbaminohemoglobin.

Answer:

Question 2: trachea
Question 3: It moves from tissue into blood via active transport by special protein channels.