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The somatic neural system relays impulses
1. From CNS to involuntary organs
2. From CNS to skeletal muscles
3. From PNS to smooth muscles
4. From PNS to voluntary organs

The autonomic neural system is a division of
1. Sympathetic neural system
2. Central neural system
3. Peripheral neural system
4. Somatic neural system

The Nissl’s granules are present in
a. Cell body
b. Axon
c. Dendrites
d. Glial cells
1. a only
2. a, b and c
3. a and c
4. a, b, c and d

Multipolar neurons are found in the
1. Retina of eye
2. Embryonic stage
3. Both (1) & (2)
4. Cerebral cortex

In a resting neuron, the axonal membrane is
1. Nearly impermeable to potassium ions (K⁺)
2. Impermeable to positively charged proteins present in the axoplasm
3. Comparatively more permeable to K⁺
4. Completely permeable to sodium ions (Na⁺)

The ionic gradients across the resting membrane are maintained by the
1. Ion channels
2. Sodium-potassium pumps
3. Electrical synapses
4. Chemical synapses

On application of a stimulus on the axonal membrane,
1. There is a rapid influx of K⁺ at that site
2. There is a rapid efflux of Na⁺ at that site
3. There is a rapid influx of Na⁺ at that site
4. There is a rapid efflux of K⁺ at that site

A synapse is formed by
1. Pre-synaptic membrane
2. Post-synaptic membrane
3. Synaptic cleft
4. All of these

Which of the following meninges is in contact with the brain tissue?
1. Duramater
2. Arachnoid
3. Piamater
4. No meninx is in contact with the brain tissue

All of the following are parts of forebrain, except
1. Cerebellum
2. Corpus callosum
3. Association areas
4. Hypothalamus

The association areas are present in the
1. Cerebral cortex
2. Corpus callosum
3. Amygdala
4. Hypothalamus

The limbic system is formed by
1. The hypothalamus, epithalamus, amygdala and hippocampus
2. Hypothalamus, amygdala and limbic system
3. Corpora quadrigemina and hippocampus
4. Midbrain and hindbrain

The canal passing through the midbrain is called
1. Medulla oblongata
2. Cerebral aqueduct
3. Eustachian tube
4. Aqueous chamber

Which layer of the wall of eyeball looks bluish in colour?
1. Sclera
2. Cornea
3. Choroid
4. Retina

Eye lens is held in the place by
1. Muscle fibres of iris
2. Ligaments attached to the ciliary body
3. A transparent gel called vitreous humor
4. Thin watery fluid called aqueous humor

The order of three layers of cells in the retina from inside to outside is
(1) Bipolar cells $\to$ Ganglion cells $\to$ Photoreceptor cells
(2) Photoreceptor cells $\to$ Ganglion cells $\to$ Bipolar cells
(3) Ganglion cells $\to$ Bipolar cells $\to$ Photoreceptor cells
(4) Photoreceptor cells $\to$ Bipolar cells $\to$ Ganglion cells

Which of the following results in the generation of potential differences in the photoreceptor cells of eyes?
1. Conversion of retinal into opsin
2. Conversion of opsin into retinal
3. Dissociation of the retinal from opsin
4. Dissociation of the opsin from retinol

The membranous labyrinth is surrounded by a fluid called
1. Perilymph
2. Endolymph
3. Cerebrospinal fluid
4. Vitreous humor

The lower membrane of the scala vestibuli is the
1. Tympanic membrane
2. Reissner’s membrane
3. Basilar’s membrane
4. Tectorial membrane

In hypermetropia, the image is formed
1. Before retina and is corrected by convex lens
2. Behind retina and is corrected by convex lens
3. Before retina and is corrected by concave lens
4. Behind retina and is corrected by concave lens

Short sightedness or myopic vision is corrected by wearing
1. Convex lenses
2. Concave lenses
3. Convex mirrors
4. Concave mirrors

Which one of the following statements is not correct?
1. Retinal is the light absorbing portion of visual photo pigments
2. In retina the rods have the photopigment rhodopsin while cones have three different photopigments
3. Retinal is a derivative of Vitamin C
4. Rhodopsin is the purplish red protein present in rods only

Which part of the human ear plays no role in hearing as such but is otherwise very much required?
1. Ear ossicles
2. Eustachian tube
3. Organ of Corti
4. Vestibular apparatus

Which one of the following statements is correct?
(1) Neurons regulate endocrine activity, but not vice versa
(2) Endocrine glands regulate neural activity and nervous system regulates endocrine glands
(3) Neither hormones control neural activity nor the neurons control endocrine activity
(4) Endocrine glands regulate neural activity, but not vice versa

Parkinson’s disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter
1. Acetylcholine
2. Norepinephrine
3. Dopamine
4. GABA

If the ligament directly below the kneecap is struck lightly by the edge of the hand or by a doctor’s rubber hammer, knee jerk reflex occurs. This stretch reflex is
1. Polysynaptic
2. Withdrawl
3. Monosynaptic
4. Bisynaptic

Which of the following is not a part of knee jerk reflex?
1. Afferent pathway
2. Muscle spindle
3. Efferent pathway
4. Interneuron

Helicotrema connects
1. Scala vestibuli and scala tympani filled with endolymph
2. Scala vestibuli and scala media filled with perilymph
3. Scala vestibuli and scala tympani filled with perilymph
4. Scala media and scala tympani filled with endolymph

When we migrate from dark to light, we fail to see for sometime but after a time, visibility becomes normal. It is example of
1. Accommodation
2. Adaptation
3. Mutation
4. Photoperiodism

The cornea is very important component of the human eye. The main function of it is to
1. Change the shape of the lens to enable the image to be focused on the retina
2. Provide structural support to the eye
3. Absorb the O₂ from atmosphere
4. Refract the light towards the retina, helps in maximum focussing