How many types of autonomic nervous systems are there?

Name the sensory receptors found in the nose and on the tongue.

List two body functions that will be affected if the cerebellum gets damaged.

Why is the flow of signals in a synapse from the axonal end of one neuron to the dendritic end of another neuron,but not in the reverse direction?

Define neuron. Name the parts of the neuron where:
$(i)$ information is acquired?
$(ii)$ impulse must be converted into a chemical signal for onward transmission?

Which of the following is not an involuntary action?