Two neurones meet at a synapse. An electrical impulse reaches the end of the first neurone.
.1
Describe how information passes to the second neurone.
[3 marks]
.2
A substance stops release of the chemical. Predict the effect on transmission at this synapse and explain your answer.
[1 mark]
6 marksHigher
Spec and skills
Original practice question
Answer and supported method checks
A campaign says: "Every lung cancer case is caused by smoking, so non-smokers need not consider any cancer risks."
Evaluate the campaign statement.
[6 marks]
5 marksFoundation and Higher
Spec and skills
Original practice question
Answer and supported method checks
During exercise a patient's heart rate is 120 beats/min and each side pumps 110 cm³ per beat. Cardiac output is the volume pumped by one side per minute.
.1
Calculate cardiac output in dm³/min.
[2 marks]
.2
Explain how increased cardiac output supports exercise.
[3 marks]
4 marksHigher
Spec and skills
Original practice question
Answer and supported method checks
Two cells have the same chromosomes. One differentiates into a muscle cell and the other into a nerve cell.
.1
Explain how each cell becomes suited to its function.
[2 marks]
.2
Evaluate the claim that different shapes prove these cells have different genes.
[2 marks]
4 marksFoundation and Higher
Spec and skills
Original practice question
Answer and supported method checks
Rose leaves develop black spots and fall early. A grower collects fallen leaves, then sprays a fungicide. A neighbour claims that antibiotics would always be a better treatment.
