Transcript do not - The Grange School Blogs

Aerobic respiration and exercise
BATs
Recall that aerobic
respiration provides
energy for work (E)
Explain how glucose and
oxygen are supplied to
respiring cells and how
carbon is removed. (C/D)
Explain how heart rate and
breathing rate increase
with exercise. (D)
Starter
What do you need to get
energy (respire)?
What do you give off as
waste products of
getting energy?
Don’t
forget your
trainers
next
Monday
What do we breathe in and out?
• Try the experiment with the suck/blow
tubes.
• Limewater goes cloudy when it is mixed
with Carbon dioxide.
• Take care – Limewater is corrosive – you
will need goggles and do not suck in the
limewater.
• Which has the most CO2 in it? Air we
breathe in or air we breathe out?
Food
Oxygen
Breathing
system
These
substances
eventually
arrive at the
body cells
Digestive
system
BLOOD
Aerobic Respiration
Every cell in the body carries out respiration
to provide organs with energy.
Glucose + oxygen
carbon dioxide +H2O
+
energy
The glucose and oxygen needed for
respiration are carried to the cells in the
blood.
Carbon dioxide and water are removed
from the cell into the bloodstream and go
to the lungs to be exhaled.
Copy this or
diagram C on
p21
RESPIRATION
Glucose + oxygen
carbon dioxide +H2O +
energy
capillary
Blood
CO2
Oxygen
+
Food
H2O
muscle cell
The molecules of glucose and oxygen move into the cells by
DIFFUSION
How does exercise affect our
breathing rate?
You will need:
Stopwatch
1. Sit still and quiet for a few minutes
2. Count how many times you take a breath
for 30 seconds, double it (breathing rate)
3. Exercise for 1 minute, then retake your
breathing rate. Record your result.
4. What do you notice? Why does this
happen
The heart
• The heart is a pump
made of muscle.
• It needs to pump
blood to the lungs to
collect oxygen and
dump carbon dioxide
• It then has to pump
blood rich in oxygen
(oxygenated blood)
and glucose around
the body.
• Look at the model
heart to see how it is
able to do this
How does exercise affect our heart
rate?
You will need:
stopwatches
1. Sit still and quiet for a few minutes
2. Use the stopwatches to find your resting
heart rate (beats per minute)
3. Exercise for 1 minute, then retake your
heart rate. Record your result.
4. What do you notice? Why does this
happen
How does exercise affect our
breathing rate?
Plenary
Read p 22 in the text book
• Copy the 4 bullet points
• Answer question 1
Don’t forget
your trainers
next Monday
Aerobic respiration and exercise
BATs
Explain why heart rate
and breathing rate
increase with
exercise. (D)
Explain why heart
monitors give more
reliable readings. (D)
Starter
What do you need to get
energy (respire)?
What do you give off as
waste products of
getting energy?
How does exercise affect our heart
rate?
You will need:
Heart monitors
1. Sit still and quiet for a few minutes
2. Use the heart monitors to find your resting
heart rate (beats per minute)
3. Exercise for 1 minute, then retake your heart
rate. Record your result.
4. Rest and repeat for 3 mins (then 6 minutes) of
exercise
5. What do you notice? Why does this happen
Aerobic Respiration -Plenary
• Fill in summary sheets
• What do these words mean: aerobic, capillary,
diffusion
• Which was the most accurate way of measuring
heart rate – taking a pulse with a stopwatch or
the heart monitors?
• Why was this?
Extension: Read page 23, 24 and 25 answer all
the questions