Reflec Arcs Flashcards
1
Q
Describe a reflex arc
A
Stimulus
Sensory receptor
Sensory neurone
Relay neurone
Spinal chord
Motor neurone
Effector
2
Q
Neurones..
A
Carry electrical impulses around body
They have dendrites to connect to other neurones
Nucleus
Cell body
Myelin sheath insulates the axon which inscreases speed of electrical impulses
Axon terminals on effectors such as muscles or glands
3
Q
Synapses
A
Gaps between neurones
Impulse arrives at neurone
Sacs containing chemicals
Chemicals are released
Synapse
Receptor site
Chemicals attach to surface of next neurone and set up a new electrical impulse
