When you exhale, air passes through the respiratory structures in which order?
a) alveolus, trachea, bronchus, bronchiole, larynx, pharynx, nasal cavity
b) alveolus, bronchiole, bronchus, trachea, larynx, pharynx, nasal cavity
c) alveolus, trachea, bronchus, bronchiole, pharynx, larynx, nasal cavity

B. Alveolus, bronchiole, bronchus, trachea, larynx, pharynx, nasal cavity.

Explanation:

The process of gaseous exchange i.e. intake of oxygen from the atmosphere and release of Carbon dioxide produced by the cell is called respiration.

The Process of respiration include , Breathing, pulmonary respiration, transport of oxygen and carbon dioxide by blood and Tissue respiration.

Breathing is a physical process and includes inspiration and expiration.

The taking in of oxygen rich air into the lungs is called inspiration or inhalation.

Releasing carbon dioxide rich alveolar air in the process of breathing is called expiration or exhalation.

The parts of respiratory system are arranged as follows:

Nose: Nose can be divided into two parts; external nose with the Nostrils and the nasal cavity.Pharynx: Nasal cavity opens into the pharyx., the common passage for food and air.Laryx: The pharynx is connected to the wind pipe through larynx.It contains vocal cords and produce soind.Trachea: Beyond the larynx, the trachea divides  into two main branches.Bronchi: The two branches of trachea are called left and right bronchi that enter the left and right lungs respectively.Bronchi further divide into secondary bronchi which again divides to form tertiary bronchi.Tertiary  bronchi divide into bronchioles.Bronchioles branch into terminal bronchioles.Each terminal bronchiole gives rise to a number of Alveoli.

Thus, When air is inhaled its path is:

Nasal cavity→pharynx→larynx→Trachea→bronchus→ bronchiole →alveolus.

So when air is exhaled, it will follow the exactly opposite path i.e.

Alveolus→bronchioles→bronchus→trachea→larynx→ pharynx→nasal cavity.

Well, both latitude and intensity of light affect temperature because, the higher the light intensity, the higher the temperature and since latitude is the measure of how close you are to the equator, then the closer to the equator you are, the higher the temperature is.

2hydrogen and 1 covalent