CIE iGCSE Co-Ordinated Science B13.2 Hormones Exam Style Questions Paper 2
Question
Which type of chemical is adrenaline?
A enzyme
B hormone
C mineral salt
D vitamin
▶️Answer/Explanation
Ans : B
Question
Adrenaline increases blood glucose concentration. It does this by changing the levels of glucagon and insulin. Which row is correct?
| adrenaline level | glucagon level | insulin level | |
|---|---|---|---|
| A | decrease | decrease | decrease |
| B | decrease | increase | increase |
| C | increase | increase | increase |
| D | increase | increase | decrease |
▶️Answer/Explanation
Answer: D) increase, increase, decrease
Explanation: Adrenaline increases blood glucose levels by stimulating the release of glucagon, which promotes glycogen breakdown in the liver, and by inhibiting insulin secretion, which would otherwise lower blood glucose levels.
Question
A student is in a dangerous situation and adrenaline is released into the blood. The table shows changes to pulse rate, breathing rate, and pupil diameter. Which row correctly describes the effect of adrenaline?
| Pulse Rate | Breathing Rate | Pupil Diameter |
|---|---|---|
| A. Decrease | Increase | Decrease |
| B. Decrease | Decrease | Increase |
| C. Increase | Increase | Increase |
| D. Increase | Decrease | Decrease |
▶️Answer/Explanation
Answer: C
Explanation: Adrenaline increases the pulse rate, breathing rate, and pupil diameter as part of the “fight or flight” response, preparing the body for action.