Node of Ranvier occurs where
(1) nerve is covered with myelin sheath

(2) neurolemma is discontinuous

(3) neurolemma and myelin sheath are discontinuous

(4) myelin sheath is discontinuous

The brain disease caused due to accumulation of amyloid $\mathrm{\beta }$-peptide is 
(1) Addison's disease

(2) Huntington's disease

(3) Parkinson's disease

(4) Alzheimer's disease

Which of the following part of human brain is also called emotional brain?
1. Corpus callosum

2. Limbic system

3. Epithalamus

4. Broca's area

Go through the following table comparing the effect of sympathetic and parasympathetic nervous system. Which one is matched correctly?

       Features              Sympathetic                  Parasympathetic
                                 Nervous System               Nervous System

(1) Pupil of eye               Dilates                         Constricts

(2) Heart rate                Decreases                       Increases

(3) Intestinal                    Stimulates                          Inhibits
     peristalsis
     movement

(4) Salivary                   Stimulates                      Inhibits secretion
     gland                        secretion

How macula lutea and corpus luteum are related ?

(1) Contribute in maintain pregnancy 

(2) Both are a source of hormones

(3) Both are characterised by their yellow colour 

(4) Both are found in human ovaries 

The cornea is a very important component of the human eye. The main function of the cornea is to
(1) bend the light before it reaches the lens

(2) provide structural support to the eye

(3) contain a concentrated amount of cone cells in the correct orientation

(4) change the shape of the lens to enable the image to be focused on the retina

Animals possess nerve networks or nervous systems to respond to their environment. But
the single celled Amoeba does not possesses any nerve cell, so, how it come to know
whether a particle it encounters is a grain of sand and not its dinner?

(1) By chemotaxis

(2) By skin

(3) By hormones

(4) All of these

Assertion   :       Circular smooth muscles of iris contract when bright light falls on the eye.

Reason      :       Pupil gets constricted by the contraction of circular smooth muscles of iris.

Assertion :      Tongue is a gustatoreceptor.

Reason    :       Receptors for gustatory sensations are located in the taste bund.

Assertion    :       All of the cranial nerves are said to be mixed nerves.

Reason      :       All cranial nerves carry both sensory and motor nerve fibres simultaneously.