What are the three types of neurons, and what do they do?
Sensory neurons - convert information from sensory receptors to neural impulses; transmit impulses from receptors to CNS
Relay neurons - allow sensory neurons and motor neurons to communicate with each other; located within the CNS
Motor neurons - neurons that carry impulses from CNS to muscles; control contractions of muscles
What is a synapse?
Synapses are found at the end of neurons; they enable electrical impulses to continue after reaching the end of a neuron
Describe the process of synaptic transmission
Synaptic vesicles contain neurotransmitter; they burst at the end of a synapse and release a neurotransmitter, which diffuses across the synaptic gap; the neurotransmitter triggers a chemical reaction in the receptor sites of the next neuron, which restarts the electrical impulse
What is a neurotransmitter?
A chemical that diffuses across a synaptic gap to continue and electrical impulse
What are the two types of neurotransmitter?
Inhibitory - make neurons less likely to fire
Excitatory - make neurons more likely to fire
GABA and serotonin are what types of neurotransmitter?
Dopamine and noradrenaline are what types of neurotransmitter?
What is fight or flight?
Activity in the body triggered by a stressful situation; the body prepares to flee or attack; this activity includes the secretion of hormones and changes within the nervous system
What are the two pathways involved in the fight or flight response?