IB Biology HL 3.1.12 Epinephrine and heart rate Question Bank
Practise IB Biology HL 3.1.12 by analysing epinephrine effects on cardiac output and intense exercise.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Analyse how epinephrine changes heart function through signalling pathways.
- Explain how hormonal responses prepare the body for intense physical activity.
C3.1.12—Epinephrine (adrenaline) question 1
The diagram shows a G protein, bound to a G protein-coupled receptor (GPCR), a transmembrane receptor which responds to epinephrine (adrenaline).
Describe two ways in which epinephrine in the body facilitates intense muscle contraction. [2]
1.
2.
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