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The Brain (biology Only) (GCSE Biology)

The following is a GCSE Biology test covering 'The Brain (biology Only)' from the broader topic Homeostasis And Response. The test is geared towards the AQA exam board style syllabus.
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Which of the following best explains long-term potentiation (LTP) in learning and memory?
What is the PRIMARY advantage of reflex pathways being routed through the spinal cord rather than the brain?
Which chemical messenger crosses a synapse to transmit a signal between neurons?
Which statement correctly distinguishes voluntary from reflex actions?
Which part of the nervous system is primarily responsible for the `fight or flight` responses that mobilise energy?
Which statement about reflex actions is correct?
Which structure links the brain to the rest of the body and conducts reflex arcs?
Which change occurs at a synapse when an action potential arrives at the presynaptic terminal?
Why is the blood–brain barrier important for brain homeostasis?
Damage to which brain area is most likely to cause difficulties with coordination and posture?
What is the effect of a drug that blocks reuptake of a neurotransmitter in the synaptic cleft?