Respiratory System

1.List the structures below in the order in which air passes them as it travels from the nose to the lungs

alveoli; trachea; bronchi; bronchioles; larynx; pharynx
Ans. pharynx; larynx; trachea; bronchi; bronchioles; alveoli

2.Which is the odd one out?
Trachea; esophagus; nasal cavity; larynx; bronchi; bronchioles
Ans. esophagus

3.How are dust particles that enter the respiratory system in the air expelled?
Ans. Through the nasal cavity--->nose hairs--->cilia

4.Add the correct terms from the list below to the following descrpions.

A.Alveoli; B.Trachea; C.Bronchioles; D.Palate; E.Pleura; F.Diaphragm; G.Pharynx; H.Expiration; I.Epiglottis; J.Tidal volume.

a) Smallest respiratory passageways. Ans.C
b)Seperates the mouth from the nose. Ans.D
c)Windpipe. Ans.B
d)Where gas exchange takes place. Ans.A
e)Stops food "going the wrong way" choking during swallowing. Ans.I

f)Both air and food pass through this. Ans.G
g)The movement of air out of the lungs. Ans.H
h)The main muscle involved in inspiration. Ans.F
i)Membranes that cover the lungs and line the pleural cavity. Ans.E
j)The volume of air inhaled or exhaled at each normal breath. Ans.J

6.Arrange these statements in the right order to describe inspiration.
A.The air pressure in the air tight pleural cavities decreases. 4
B.The muscles between the ribs contract to move the ribs cranially and laterally. 1
C.Air is drawn down the trachea into the lungs. 5
D.The diaphragm contracts and flattens. 2
E.The lungs expand to fill the space created. 3

7.True or false? Circle the correct answer
a)The pericardium is the membrane surrounding the lungs. Ans.True

b)The tidal volume describes the maximum amount of air that can be inhaled into the lungs. Ans.False

c)The epiglottis closes off the larynx during swallowing. Ans.False

d)When an animal exercises the rate of breathing increases because the carbon dioxide in the blood increases. Ans.True

e)Carbon dioxide in the blood is maily in the blood plasma. Ans.True

f)Oxygen moves from the alveoli into the capillaries by the process of osmosis. Ans.False

g)Expired air contains around 16% oxygen. Ans.True