Respiratory system Flashcards
What is the pathway of air?
1) we breath air through the nose/ mouth.
2) the air travels down the trachea.
3) the air passes through the bronchi.
4) air then moves through the bronchioles.
5) gaseous exchange occurs in the alveoli.
Name 4 feature of alveoli that make the effiecent for gaseous exchange.
1) large surface area as there is so many of them.
2) very thin, moist walls so gas can easily pass through.
3) have a good blood supply as they are surrounded by capillaries.
4) shale makes them well ventilated, so gases can pass through easily.
What happens during inspiration?
Diaphragm and intercostal muscles contract. Rib cage moves up and out pressure in the thorax decreases. Air rushes is in
What happens during expiration?
Famine, intercostal muscles, relax. Rib cage moves in and down. Pressure in the thorax increases air rushes out
what is the definition for minute ventilation?
volume of air breathed in or out per minute.
what happens to your minute ventilation when you exercise?
it increases
what is the definition of residual volume?
volume of air left in the lungs following a breath out.
what happens to your residual volume when you exercise?
it stays the same
what is the definition of tidal volume?
volume of air breathed in or out per breath.
what happens to your tidal volume when you exercise?
it increases
what is the definition of vital capacity?
the maximum volume of air that can be breathed out following a full breath in.
what happens to your vital capacity when you exercise?
stays the same
how do you calculate minute ventilation?
minute ventilation = tidal volume x breathing rate.
what is the definition of breathing rate?
the number of breaths taken in one minute.
