You are watching a horror movie and notice that your heart rate increases and your mouth becomes dry. What is the reason for this?

Read the following statements :-
$(A)$ Sympathetic nervous system accelerates heart beat rate.
$(B)$ The junction between the axon of one neuron and the sarcolemma of a muscle is known as a neuromuscular junction,not a synapse.
$(C)$ The midbrain integrates visual,auditory,and tactile inputs.
$(D)$ The limbic system consists of fiber tracts that interconnect different regions of the brain and is primarily involved in the regulation of sexual behavior,expression of emotional reactions,and motivation,rather than controlling movement.
Choose the option from given below which includes correct statements.

Match the following:

Column-$I$	Column-$II$
$(a)$ Unipolar neurons	$(1)$ Amygdala and Hippocampus
$(b)$ Limbic system	$(2)$ Centre for control of body temperature
$(c)$ Hypothalamus	$(3)$ Embryonic stage

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:

Identify the location and function of the following structures:
$(1)$ Cone cells
$(2)$ Ear ossicles

Explain the following:
$(a)$ Role of $Na ^{+}$ in the generation of action potential
$(b)$ Mechanism of generation of light-induced impulse in the retina.
$(c)$ Mechanism through which a sound produces a nerve impulse in the inner ear.