Biology Flashcards 1 - Testing (e.g. carbs), Heart, Lungs, Leaves
What happens to CO2 in the alveoli
Diffuses into the alveoli from plasma
Test for carbohydrates
Starch = Iodine Test- orange to blue/black
Sugars = Benedicts solution - blue to brick red
What is a double circulatory system
Two pumps working at the same time to pump blood in 2 different directions (Lungs, heart)
What is coronary heart disease
The coronary arteries that supply blood to the heart muscle become narrow
What is an active site
The special site in the enzyme where the substrate binds
Colour change for protein
Buiret = Blue - Purple
Structural factors of capillaries
Very small lumen
Wall made of a single layer of a cell
What diffuses into the blood from the body/tissues/organs
CU IN THERE
C02
Urea
What four factors affect the rate of transpiration
Light intensity
Temperature
Humidity
Air movement
What is a pathogen
A microorganism that can cause diseases
What is used to measure the rate of transpiration
Potometer
What happens to oxygen in the alveoli
Diffuses from the alveoli into red blood cells
What is the palisade mesophyll layer and what happens here
- Where most of photosynthesis takes place.
- The top layer of cells long and thin, densely packed together
- Contains a lot of chloroplasts
What are the other cells that line the trachea and bronchi
Oppenheimer
Cilia
Describe how we breathe
- Air comes down strong tube called the trachea
- Trachea branches into two smaller tubes called bronchi
- Each bronchi has branches called bronchioles
- At the end of these are alveoli, where the oxygen, where the oxygen moves from the air into the blood
How does an artificial pacemaker work
Electrical device that corrects irregularities in heart rate
Artificial heart valve
Advantages:
Disadvantages:
Advantages: Lasts a very long time
Disadvantages: Need to take medication for the rest of your life
What diffuses out of the blood into body/tissues/organs
GOA
Glucose
Oxygen
Amino Acids
What are the 4 factors of the blood in the vein
1 - Low pressure
2 - Smooth blood flow
3 - Dark red
4 - De-oxygenated
What does the lower epidermis of the leaf do
- Contains pores called stomata which let gases in and out of the leaf
What are stomata
- Pores that let gases in and out
- Controlled by guard cells
What is the method for the stomata peel practical
- Collect a leaf
- Paint a bit of nail varnish on the top and bottom of the leaf
- After dry, put a strip of clear tape on both sides and then peel off both.
- Tape them onto the slides and view through microscope
What causes coronary heart disease
Build up of fatty material on the lining of the vessels
