Respiration Flashcards
Name the tube that carries air too and from the lungs
Trachea
What is the function of the nasal cavity?
warms and filters air before it moves to the lungs
Define ‘Breathing’
The process by which air rich in oxygen is taken into the lungs and air rich in carbon dioxide is removed
What is the purpose of rings of cartilage in the trachea and bronchi?
Support to prevent collapse
State the function of the pleural membranes
line the ribs and outside of the lungs.
Produce pleural fluid to reduce friction during breathing.
State the precise site of gas exchange
Alveoli (air sacs)
What process is involved in gas exchange?
Diffusion
The membranes lining the alveoli are referred to as
R_ _ _ _ _ _ _ _ _ _ S_ _ _ _ _ _ _
Respiratory Surfaces
Define ‘Diffusion’
The movement of molecules from and area of high concentration to an area of low concentration
How are the Respiratory Surfaces adapted for gas exchange?
Large Surface Area, Thin walls (short diffusion distances)
Moist walls. Permeable surfaces, Good blood supply.
Blood carries away absorbed oxygen, this maintains a Diffusion G_ _ _ _ _ _ _
Diffusion Gradient
When using a lung model (bell jar) what part of the respiratory system is represented by the rubber sheet at the bottom?
Diaphragm
When breathing in do the intercostal muscles and diaphragm contract or relax?
The intercostal muscles and diaphragm contract when breathing in.
explain why the lungs fill with air when you breath in.
The intercostal muscles and diaphragm contract
The volume of the thorax increases
The pressure decreases
Air move into the lungs from high to low pressure
Respiration is a chemical process that occurs in cells, but where exactly does it occur?
In Mitochondria
