In humans,if the abducens nerve is damaged,which of the following functions will be affected?

Given below are two statements with respect to the neurotransmitter,dopamine.
Statement-$I$: Degeneration of dopamine-producing neurons causes Parkinson's disease.
Statement-$II$: Dopamine levels increase due to cocaine.
Choose the most appropriate answer from the options given below.

Complete the statement by selecting the appropriate match among the following.

Column-$I$	Column-$II$
$(a)$ Resting potential	$(i)$ Chemicals involved in the transmission of impulses at synapses.
$(b)$ Nerve impulse	$(ii)$ Gap between the presynaptic and postsynaptic neurons.
$(c)$ Synaptic cleft	$(iii)$ Electrical potential difference across the resting neural membrane.
$(d)$ Neurotransmitters	$(iv)$ An electrical wave-like response of a neuron to a stimulation.

Which of the following cranial nerves are classified as mixed nerves?

Which of the following statements are correct?
$(i)$ $Ramus$ $dorsalis$ branch of spinal nerve contains sensory as well as motor nerve fibres.
(ii) The preganglionic nerve fibres arise from the entire spinal cord.
(iii) There are $31$ pairs of spinal nerves.
(iv) The somatic nervous system transmits impulses from $CNS$ to visceral organs.
$(v)$ Reflex action is a sudden,thoughtful,and voluntary response to the applied stimulus.
Select the correct option.

Which of the following is/are controlled by the human brain?
$(a)$. Balance of the body
$(b)$. Circadian rhythm of the body
$(c)$. Human behaviour
$(d)$. Functioning of heart and kidneys