Paper 1 To Learn Flashcards
(16 cards)
Difference between triglyceride and phospholipid?
Phospholipid has two fatty acids and one phosphate molecule.
Difference between saturated and unsaturated fatty acid
Saturated fatty acids have single carbon bonds
Unsaturated fatty acids have double carbon bonds
Feature of scanning electron
Produces 3D images
Why does a trained sprinter have a higher cardiac output?
Thicker and stronger ventricular muscles (left) in heart
Stroke volume increases
What is equation for cardiac output ?
Cardiac output = heart rate x stroke volume
What is stroke volume ?
Amount of blood pumped out of the heart with each heartbeat
Arterioles structure + function
Carry blood to organs
Small lumen and thick muscular walls to maintain high blood pressure
What is standard deviation?
Measure of how spread out the repeats are from the mean
Advantages of using SD over range
- Shows the spread of data around the mean
- Reduces effect of anomalies
- Indicates whether a difference between results in significant
using standard deviation - likely to be a significant difference
When you add/minus the standard deviation from the means and there is NO overlap
Using standard deviation - unlikely to be a significant difference
When you add/ minus standard deviation from the mean and there is an overlap
Indicates there is no significant difference between those means
One cell thick walls makes the alveoli more _____ to co2 + o2
Permeable
How to make sure index of diversity is representative of each habitat
Random number of samples
Large number of samples
Advantage of replanting hedges on farm land
Greater biodiversity so increase in predators for pests
-more yield/income/damage to crops
Increase in pollinators so more yield
Disadvantage of hedges on farm land
Reduced land area of crop growth / income
Greater biodiversity so increase in pest population
