IB Biology

movement of air in and out of lungs

• ventilation

• gas exchange

• respiration

• breathing

Diffusion of oxygen and carbon dioxide in and out of alveoli

• ventilation

• breathing

• gas exchange

• respiration

select all that increase diffusion rate

• high concentration gradient

• high surface area

• low concentration gradient

• short diffusion distance

Muscle pairs that oppose each other's movement

• antagonistic muscles

• opposable muscles

• opposite muscles

• rivals

Muscle at the base of the rib cage

• internal intercostal

• external intercostal

• diaphragm

• abdominal wall muscle

muscles that contract during inhalation (select all)

• internal intercostal muscles

• external intercostal muscles

• abdominal wall muscles

• diaphragm

muscles that contract during exhalation (select all)

• internal intercostal muscles

• external intercostal muscles

• abdominal wall muscles

• diaphragm

tube where air enters the body

• trachea

• bronchi

• bronchioles

• oesophagus

Trachea branches into two branches called

• bronchi

• bronchioles

• capillaries

• alveoli

Air filled sacs at end of bronchioles are called

• alveoli

• bronchi

• trachea

• grapes