Read the following statements.
$I.$ Preganglionic nerve fibres of $III, VII, IX$ and $X$ cranial nerves are a part of the parasympathetic nervous system.
$II.$ $V, VII, IX$ and $X$ cranial nerves are mixed nerves.
$III.$ Trochlear nerves are the largest cranial nerves.
$IV.$ Abducens nerves are motor nerves and originate from the Gasserian ganglia.
Which of the above statements are correct?

Glucose and oxygen are required by the brain for a constant supply of energy to control the functions of our body organs. What will be the consequences if the brain is deprived of oxygen and glucose?
$I.$ Brain deprived of oxygen for just $5$ minutes will get permanently damaged.
$II.$ Glucose is important in the nerve impulse conduction.
$III.$ One side of the brain is unable to know what the other side is doing when it is deprived of oxygen.
$IV.$ Mental confusion will result if the brain is deprived of glucose.

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.

Read the following statements:
$(A)$ The neural system provides an organized network for point-to-point connections.
$(B)$ The endocrine system provides chemical integration through hormones.
$(C)$ The neural system is very simple in lower invertebrates.
$(D)$ Neurons can detect and receive stimuli but cannot conduct them.
How many of the above statements are incorrect?

Match the following:
Receptors | Stimuli
$A.$ Statoreceptors | $1.$ Frequencies of vibrations
$B.$ Gustatory receptors | $2.$ Hunger and thirst
$C.$ Enteroreceptors | $3.$ Taste
$D.$ Mechanoreceptors | $4.$ Equilibrium
The correct pairing sequence is:

Given below is a table comparing the effects of sympathetic and parasympathetic nervous system for four features. Which one feature is correctly described?