Practice IB Biology Topic 6.5 Neurons and Synapses with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for 6.5 Neurons and Synapses and mirrors Paper 1A, 1B, 2 style where relevant.
Get instant solutions, detailed explanations, and build confidence with questions aligned to IB examiner expectations.
Draw a labelled diagram of the human heart showing the attached blood vessels.
Describe the action of the heart in pumping blood.
Nerves connecting the brain and heart contain neurons that control heart rate. Explain how a nerve message passes from one neuron to another neuron.
What happens during synaptic transmission?
Draw a labelled diagram to show the molecular structure of a membrane.
Some proteins in membranes act as enzymes. Outline enzyme-substrate specificity.
Membranes of pre-synaptic and post-synaptic neurons play an important role in transmission of nerve impulses. Explain the principles of synaptic transmission.
The graph below shows changes in membrane potential in an axon during the passage of an action potential. What is causing the decrease in membrane potential at point ?
Draw a labelled diagram of the structure of a motor neuron.
Outline the control of the heartbeat by the nervous and endocrine systems.
Explain the principles of synaptic transmission.