Respiratory System

Question 1

What is the pathway of air through a human body

Answer 1

Nose/Mouth —> Pharynx —> Larynx —> Trachea —> Lungs —> Bronchi —> Bronchioles and alveoli

Question 2

What are the roles of the intercostal muscles

Answer 2

Internal intercostals assist with exhalation and moving the ribs and chest cavity back to their original position

Question 3

What is meant by the term diffusion

Answer 3

net flow of particles from a region of high concentration to a region of low concentration

Question 4

What is meant by the term gaseous exchange

Answer 4

The movement of oxygen and carbon dioxide between the lungs and blood at the alveoli

Question 5

What are the features of alveoli that assist gaseous exchange

Answer 5

Moist, very thin walls (one cell thick), provides large surface area for it to occur, short diffusion distance, they are surrounded by capillaires

Question 6

What is meant by Tidal Volume

Answer 6

The amount of air that goes in and out of our lungs for example an average male intake is around 500ml

Question 7

What is meant by Residual Volume

Answer 7

Air that is remaining after inhaling or exhaling

Question 8

What is meant by the term vital capacity

Answer 8

Amount of capacity our lungs can hold