Neurones and the reflex arc, synapses, and the structure and function of the eye.
The nervous system
The central nervous system (brain and spinal cord) and nerves coordinate fast responses. Receptors detect stimuli; impulses travel along neurones to effectors.
A reflex arc is fast and automatic: receptor → sensory neurone → relay neurone (CNS) → motor neurone → effector. At a synapse, a chemical neurotransmitter carries the signal across the gap.
Viewing only
This content is free to read on superexams.com and cannot be printed or downloaded.
Read the full note, free
Create a free account to read this note in full. Every free account gets 2 complete revision notes, no card needed.