More Questions Flashcards
what is haemoglobin?
is a red pigment found in red blood cells which gives the colour to them
what is the human body temperature?
37
what is platelets?
tiny fragments of bigger cells
the capillaries have thick walls
1, true/false
2, explain why
false
because if not the gaseous exchange wouldn’t work, because the gases wouldn’t pass through
where is the heart found?
it lies between your lungs in your chest
what is pulse?
is the change in the blood pressure
Cristina does a lot of exercise,
will his pulse rate be higher than Elizabeth and Alejandras ( she isn’t fit)
no, because people that are fitter have a lower pulse rate
what is the name for the average pulse rate.
beats per minute
can pulse be affected? + examples
pulse rate can be affected by the sex, the age…
i want to measure my pulse rate, how do i do it and where?
on the neck or wrist
count the beats in 10 seconds and multiply it by 6
cristina wants to train because she wants to be fit,
so where should she go if she wants to have more red blood cells?
mount everest or a high random place
Describe an experiment for
To show that a solid expands when heated and contracts when cooled
- Check that the ball just fits through the ring when cool.
- Using tongs to hold the chain, heat the ball over a Bunsen flame for a few minutes.
- Using the tongs again, try to pass the ball through the ring as in
- Allow the ball to cool.
- Check again to see if the ball will now pass through the ring
describe an experiment for
To investigate conduction in water
- trap a lump of ice with a wire gauze at the bottom of the boiling tube. The ice could also be wrapped in the wire gauze.
- Add ordinary tap water to the boiling tube until it is about two-thirds full.
- Hold the boiling tube at an angle with metal tongs. Heat the water near the top of the boiling tube until it begins to boil. Observe what happens to the ice.
describe an experiment for
to investigate convection in water
- Set up the apparatus
- Using forceps, drop a crystal of potassium manganate to a corner of the beaker directly above the candle. (The crystal is best added by putting it down through a glass tubing, which touches the bottom of the beaker. Then, to remove any coloured water, place your finger over the top of the glass tube and lift it out to the sink.)
- Heat the beaker gently with the candle (or a low-level Bunsen flame).
- Observe what happens
What is egestion
Getting rid of unwanted waste
