Respiration and gas exchange Flashcards
(26 cards)
what is respiration not
Breathing in and out
where does respiration occur
every cell in the body
what is respiration
the process of realising energy from glucose which happens constantly in every living cell
how is energy from respiration released
as chemical energy and heat
what are the two types of respiration
aerobic
anaerobic
what does aerobic respiration require
plenty of oxygen
what is the word and symbol equation for aerobic respiration
Glucose + oxygen –> carbon dioxide + water +(energy)
C6H1206 +6CO2 –> 6CO2 + 6H20 +(energy)
which form of respiration doesn’t require oxygen
Anerobic (as body cant supply enough energy for intense exercise)
what’s the word equation for Anaerobic respiration
glucose –> lactic acid + energy
what is the word equation for anaerobic respiration in plants
Glucose –> ethanol + carbon dioxide + energy
How can you measure the rate of respiration
in plants respiration gives of heat so a thermometer could be used to measure the temperature of the test
what do plants use to exchange gases
Diffusion
name a waste product from photosynthesis
O2
name a factor which can alter the net exchange of gases
light intensity
at night what do plants do
they take in oxygen and produce co2
how have leaves adapted for gas exchange
Leaves are broad, so large surface area for diffusion
Thin so gases only have to travel short distances
There are lots of air spaces inside the leaf which allow gases like carbon dioxide and oxygen to move easily between cells
Stomata to let gases diffuse in and out. also used to allow water to escape
what does hydrogen-carbonate indicator show
changes in co2 concentration
where are the lungs located
The Thorax
what is the Thorax
top part of the body
what separates two parts of the body
diaphragm
what is the windpipe called
Tracheas
what happens when you breath in
Intercostal muscles and diaphragm contract
Thorax volume increases
this decreases the pressure drawing air in
what happens when you breath out
intercostal muscles and diaphragm relax
thorax volume decreases
air is forced out
what part of the body carry out gas exchange
alveoli
