B5

Question 1

How do impulses travel across the synapse

Answer 1

chemicals diffuse across the gap

Question 2

what are the negatives of IVF

Answer 2

could results in multiple births which can cause stress for the mother and the baby
low success rate - 26%
unused embryos are destroyed which results in ethical issues

Question 3

what happens if blood glucose is too low

Answer 3

glucagon is secreted from the pancreas
glucagon makes the liver turn glycogen into glucose
liver releases glucose into the blood

Question 4

what does thyroxine control

Answer 4

metabolism and heart rate

Question 5

what are the control variables for reaction time investigation

Answer 5

same person
same hand
No caffeine consumed before