Respiration Flashcards
What is respiration?
The body needs a continuous supply of oxygen to produce energy. when oxygen is used to break down food to release energy a waste product is produce. respiration is the taking in of oxygen and removal of carbon dioxide.
what is the definition of ventilation
getting air into and out of the lungs
what is external respiration
gaseous exchange between the lungs and blood
internal respiration
exchange of gases between the blood in the capillaries and the body cells
what is cellular respiration
the metabolic reactions and processes that take place in a cell to obtain energy from fuels such as glucose
the mechanics of breathing.
what happens to the muscles during inspiration
the ribcage - moves upwards and outwards
the diaphragm contracts and it pulled flat
the mechanics of breathing during expiration
the rib cage falls and the diaphragm relaxes and ribs return to domed shape position.
what is the definition of tidal volume
the volume of air inspired or expired per breath
what is minute ventilation
the volume of air inspired and expired in a minute
how do you work out minute ventilation
number of breaths per minute x tidal volume = minute ventilation
what can be used to measure the volume of air that we breath in and out
a spirometer
how do you use a spirometer
an individual breather in and out of a sealed chamber through a mouth piece
this makes the chamber inflate and deflate
as this happens a pen records traces the breathing movements onto a chart
the machine is cilibrated so breathing volumes can be c aculated
what is partial pressure
the pressure exerted by an individual gas when it exits within a mixture of gases
what is diffusion
the movement of gas molecules from an area of a high concentration to an area of low concentration
is the partial pressure of oxygen in the alveoli is higher than the partial pressure in the capillary blood vessels
yes it it, the partial pressure of oxygen is (100mmHG) and the partiualk pressure in the capillaries in (40mmHg)
