Spinal cord

Sensory neuron

Motor neuron

Parasympathetic nerves

Transmit impulse from sensory receptor to CNS and Transmit impulse from CNS to effector cells

receive impulse from sensory receptor to CNS and Transmit impulse from CNS to effector cells

receive impulse from CNS to effector cells

Transmit impulse from sensory receptor to CNS

Voluntary movement

involuntary response

Brain response

Reflex response

Somatic neuron consist of 1 neuron while autonomic neuron consist of 2

Somatic neuron is myelinated while autonomic neuron is unmyelinated

Somatic neuron transmit impulse to skeletal muscle while autonomic neuron transmit impulse to smooth muscle

Somatic neuron consist of preganglionic and postganglionic neuron while autonomic neuron consist of preganglionic neuron only

Accelerate heart beat

Stimulate glucose release from liver

Relaxes bronchi in lungs

dilates pupil

Constrict pupil

Slows heart

Stimulate salivary glands

Constrict bronchi in lungs

Stimulus that is able to depolarize the axon directly

Situation that can be detected as stimulus

Heat stimulus detected by receptor

Mechanical stimulus detected by baroreceptor

If intensity of stimulation exceed threshold potential, action potential is generated

If intensity of stimulation is less than threshold potential, action potential generated

Further increase in the intensity of stimulus increase the amplitude of action potential

Absolute refractory period

Relative refractory period

Excitable refractory period

Recovery refractory period

Larger diameter of axon

Myelinated neuron

Higher number of synapse between neuron

Smaller number of synapse between neuron

Junction where one neuron communicate with another neuron via neurotransmitter

The connection between sensory neuron and motor neuron

Junction where one neuron communicate with another neuron directly

The connection between two pre-synaptic membrane

Norepinephrine

Acetylcholine

Dopamine

Serotonin