Which of the following is the correct pathway of air into the lungs to the site

Question

Which of the following is the correct pathway of air into the lungs to the site of gas exchange?
Answer
A.nasal cavity-pharynx-larynx-trachea-bronchi-bronchioles-alveoli
B.bronchi-pharynx-larynx-trachea-nasal cavity-bronchioles-alveoli
C.bronchi-pharynx-trachea-nasal cavity-bronchioles-alveoli-larynx
D.nasal cavity-alveoli-bronchioles-bronchi-trachea-larynx-pharynx
E.pharynx-trachea-nasal cavity-bronchioles-alveoli-larynx-bronchi


The first step of starch digestion is performed by

A.the tongue mixing food with saliva.
B.taste buds secreting pepsin.
C.amylase in the saliva.
D.the tongue mixing food with saliva which contains amylase.
E.glands in tongue secreting lipase.

The tracheal system of insects

A.helps remove metabolic wastes from their bodies.
B.makes a respiratory pigment in their hemolymph unnecessary.
C.relies on the expansion and contraction of the body wall to move air into and out of the system.
D.is limited to the posterior end of the body.
E.digests food and distributes nutrients to the body

Explanation / Answer

A.nasal cavity-pharynx-larynx-trachea-bronchi-bronchioles-alveoli D.the tongue mixing food with saliva which contains amylase. C.relies on the expansion and contraction of the body wall to move air into and out of the system.

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