Gas Exchange in mammals A level

What happens when you breathe in? (tick all that apply)

• diaphragm relaxes and moves up

• diaphragm contracts and flattens

• increases volume in thorax

• reduces volume in thorax

• pressure in thorax lower than outside

What adaptations does the alveoli have for efficient gas exchange?

• thick walls

• thin walls

• small surface area

The diagram shows the structure of the human gas exchange system. Name organ P.

• alveolus

• trachea

• bronchus

• diaphragm

The diagram shows the structure of the human gas exchange system. Name organ Q.

• alveolus

• trachea

• bronchus

• diaphragm

In this word equation for respiration, what is y representing?

Glucose + x --> y + water + energy

• carbon dioxide

• methane

• oxygen

• ATP

Tags

NGSS.HS-LS1-7

How does an increase in lung volume lead to air entering the lungs?

• Produces higher pressure

• Produces lower pressure

Tags

NGSS.MS-PS2-1

The air sacs that are covered with capillaries where gas exchange takes place

• bronchi

• lungs

• oxygen

• alveoli

what is found around alveoli?

• capillaries

• pleura

• lymphatic nodes

• saliva

Tags

NGSS.HS-LS2-3

Letter D is pointing to which Respiratory organ?

• Alveoli
• Diaphragm
• Lung
• Bronchi

The film of water on the surface of human air sacs serves to

• warm the incoming air.

• moisten the incoming air.

• trap dust in the inhaled air.

• dissolve the gases in the inhaled air.