Breathing And The Respiratory System Flashcards
Why does the trachea stay open during inhaling/ exhaling?
It has c shaped rings of cartilage in its walls
Where are pleural membranes found?
The inside of the chest wall and the outside of the lungs
What is the space between the pleural membranes called?
What does it reduce?
The pleural cavity
It reduces friction during breathing
What happens to oxygen in the alveolus?
It disused from the alveolus into the blood
Why does the respiratory system need to be moist?
Gases dissolve in the moisture before gas exchange
Why does the respiratory system need to have a large surface area?
To maximise the amount of gas exchange
Why does the respiratory system need to have a large diffusion gradient?
The bigger the diffusion gradient the faster the rate of diffusion
When breathing in, what do the intercostal muscles do?
Contract
When breathing in, what does the diaphragm do?
Moves downwards
When exhaling, what happens to the volume in the chest cavity?
It decreases
When exhaling, what happens to the pressure in the thorax?
It increases
What is the word equation for respiration?
Oxygen+glucose-carbondioxide+water
What is active transport?
The movement of substances from an area of lower concentration to an area of higher concentration.
What is the word equation for aerobic respiration?
Glucose+oxygen-carbondioxide+water
(+energy)
What is anaerobic respiration?
Respiration that takes place without oxygen
