Nose

Q.

Which of the following is not true about olfactory system?

1. The olfactory bulbs are a pair of swellings above the olfactory epithelium.

2. Olfactory bulb is a relay center for the information of smell.

3. The olfactory epithelium has a mucous layer and therefore only non-water soluble odor molecules will be able to pass easily.

4. Olfactory epithelium is in the middle of the place where your eyes sit in your skull.

Q.

Which of these is not a function of the nasal chamber?

1. Gaseous exchange

2. Cleaning the air

3. Olfactory sense

4. Humidification of the inhaled air

Q. Partial pressure of oxygen decreases in alveolar air when we inhale the atmospheric air into the lungs.give reason