Practice Questions
1.What is the brain made up of?
The brain is made of billions of interconnected neurones
2. Why is it difficult to investigate brain function?
Different regions have overlapping functions, making it difficult to identify the role of individual areas.
Damage to one area may affect several functions, so results are hard to interpret.
Experiments are limited by ethical issues, so scientists cannot directly test brain function.
People respond differently to brain damage, making results less reliable.
3. State 3 ways that brain function can be mapped.
1.Studying patients with brain damage.
2.Electrical stimulation of the brain
3.MRI scanning
Factors affecting the rate of photosynthesis
Measuring & calculating rates of photosynthesis
Inverse square law and photosynthesis
Economics of enhancing the conditions in greenhouses
Investigating the effect of light intensity on the rate of photosynthesis