The Respiratory System.

What is the main function of respiration in an organism?

• Filtering air

• Release of energy from food

• Taking in oxygen

• Letting out carbon dioxide

Where does inhalation occur in the respiratory system?

• Trachea

• Nose

• Mouth

• Bronchus

What is the function of the diaphragm in breathing?

• To warm and moisten air

• To exchange gases

• To cause air to move and out of the lungs

• To filter air

What is the purpose of the epiglottis in the respiratory system?

• To cover the trachea during eating

• To filter air

• To carry air to the lungs

• To exchange gases

What happens when the intercostal muscles relax during exhalation?

• Diaphragm moves down

• Ribs move down and in

• Ribs move up and out

• Diaphragm arches up

How does the diaphragm affect the inflation of the lungs?

• When pulled up, lungs inflate

• When pulled down, lungs inflate

• When pushed down, lungs inflate

• When pushed up, lungs inflate

What is the main cause of breathing faster during exercise?

• Increased lung capacity

• Increased carbon dioxide concentration

• Increased oxygen intake

• Increased energy production

What is the function of diffusion in the gaseous exchange process?

• To move oxygen from capillaries to alveoli

• To move carbon dioxide from alveoli to capillaries

• To move carbon dioxide from capillaries to alveoli

• To move oxygen from alveoli to capillaries