Unit 3: Interaction and Interdependence
Topic 3.5: Neural Signalling Questions
Practice 20 exam-style questions for IB Biology Topic 3.5. Review the question stems below, then unlock the full Question Bank to access markschemes, model answers, and AI grading.
1Identify1 mark
Which ion movements by the sodium-potassium pump establish the resting potential of a neuron?
Markscheme and model answer locked
Unlock Question2State1 mark
• Aimnova practice
State which ion moves into the axon during depolarisation, and the direction in which it moves.
Markscheme and model answer locked
Unlock Question3Identify1 mark
In a pain (withdrawal) reflex arc, which structure acts as the receptor?
Markscheme and model answer locked
Unlock Question4Identify3 marks
• Aimnova practice
In a pain reflex arc, identify the receptor and the effector, and state where the synapses between the neurons are located.
Markscheme and model answer locked
Unlock Question5State1 mark
• Aimnova practice
State where depolarization occurs along a myelinated axon during an action potential.
Markscheme and model answer locked
Unlock Question6Identify1 mark
In which region does chemical transmission of a signal between two neurons most likely occur?
Markscheme and model answer locked
Unlock Question7Identify1 mark
A weak stimulus is applied to a neuron but no action potential is recorded.
Which term best explains why nothing fired?
Markscheme and model answer locked
Unlock Question8State1 mark
• Aimnova practice
State the two components of the central nervous system.
Markscheme and model answer locked
Unlock Question9Identify1 mark
Which sensory receptor type detects the temperature of a hot drink touching the lips?
Markscheme and model answer locked
Unlock Question10Identify1 mark
On a diagram of a myelinated motor neuron, where does depolarization occur during an action potential?
Markscheme and model answer locked
Unlock Question11Identify1 mark
What is the approximate value of the resting potential of a neuron, and is the inside positive or negative relative to the outside?
Markscheme and model answer locked
Unlock Question12Identify1 mark
What is the correct order in which a nerve impulse passes through the parts of a neuron?
Markscheme and model answer locked
Unlock Question13Identify1 mark
A nerve fibre is described as 'insulated'.
Which feature makes it insulated?
Markscheme and model answer locked
Unlock Question14State1 mark
• Aimnova practice
State where the synapses between the sensory neuron and the relay neuron of a reflex arc are located.
Markscheme and model answer locked
Unlock Question15Identify1 mark
What is the main role of the myelin sheath around an axon?
Markscheme and model answer locked
Unlock Question16Identify1 mark
Which statement correctly describes the function of a sensory neuron?
Markscheme and model answer locked
Unlock Question17Identify1 mark
When a person treads on a sharp object and pulls their foot away, which structure is the effector in this reflex arc?
Markscheme and model answer locked
Unlock Question18Identify1 mark
Which two structures make up the central nervous system?
Markscheme and model answer locked
Unlock Question19State1 mark
• Aimnova practice
State the directions in which sodium ions and potassium ions are moved by the sodium-potassium pump as it establishes the resting potential.
Markscheme and model answer locked
Unlock Question20State1 mark
• Aimnova practice
State the name of the structure at which a chemical signal is passed from one neuron to the next.
Markscheme and model answer locked
Unlock QuestionReady to practice Topic 3.5?
Get instant AI feedback on your answers, view detailed markschemes, and track your progress across all IB Biology topics.