Respiration

The lining of the nasal cavity is covered with a thin film of mucus. What is the importance of the mucus?

• It warms up the inhaled air.

• It helps remove dust from the incoming air.

• It lubricates the passage of air into the respiratory trac.

• It helps dissolve oxygen in the inhaled air for gas exchange.

Which molecule is indicated by X?

• glucose

• ATP

• carbon dioxide

• protein

During periods of vigorous physical activity, a person's breathing and heart rates increase. This enables the cells of the body to perform more efficiently because it helps the cells to

• remove waste products faster

• store excess glucose in muscles

• reduce the amount of ATP produced

• convert more oxygen to glucose

The human body has many cells that are deep inside the body. For this reason, the human body requires

• a transport system and other organs

• carbon dioxide from the air

• the synthesis of many inorganic compounds

• the breakdown of glucose by the digestive system

What is the site of gas exchange?

• alveoli

• bronchus

• nose

• trachea

The division of the trachea forms

• main bronchi

• alveoli

• lungs

• nose

Which of the following are features of the alveoli that adapt them to gas exchange?

I. High surface area

II. Thin walls

III. Dry surfaces

• I and II only

• I only

• II and III

• I, II, and III

Given the following structures:

1. alveoli

2. bronchi

3. bronchioles

Which of the following is the correct order in which air would flow after inhalation?

• 1,2,3

• 2,1,3

• 2,3,1

• 3,2,1

What adaptations does the alveoli have for efficient gas exchange?

• thick walls

• thin walls

• small surface area

what is found around alveoli?

• capillaries

• pleura

• lymphatic nodes

• saliva