Read the following statement carefully and choose how many of them are incorrect

a. Afferent neuron transmits signal of CNS.

b. The choroid layer is bluish color and is present over the posterior two-thirds of the eyeball.

c. Olfactory bulbs are an extension of the hypothalamus

d. Medulla oblongata have centre to control excretion, circulation, and gastric secretion.

1. One

2. Two

3. Three

4. Four

Following diagram showing parts of an eye. Choose the incorrect labelling in diagram :-

1. Sclera, Retina, Lens, Optics nerve

2. Lens, vitreous chamber, retina, Iris

3. Fovea, Blind spot, Arterial chamber

4. Retina, Sclera, Iris, Cornea

Read the following sentences and find out the correct option :-

(1) Wax secreting ceruminous glands found in wall of external auditory meatus

(2) Membranous labyrinth is surrounded by series of channels filled with endolymph

(3) Visual cortex is area of occipital lobe where action potential of olfactory nerve is analysed

(4) Scala vestibuli and scala tympani chambers of ear are terminated at Basilar's membrane

Select the option with incorrect combination of the structure with its location and function :-

1. (1)

2. (2)

3. (3)

4. (4)

Function of eustachian tube is :- 

1. Transfer of sound wave towards internal ear

2. Gives nutrition to ear ossicle

3. Equalising the pressure on either side of tympanum

4. Hearing

Match the following columns and select the correct option

The inner ear contains a complex system located above the cochlea called ........... 

(A) ........... It is influenced by gravity and movements and help us in ............... (B) .......

1. A - organ of corti, B - Hearing

2. A - organ of corti, B - Maintaining posture

3. A - Vestibular apparatus, B - maintaining posture

4. A - Macula, B - Hearing 

A small region on the retina of the eye which contains only cones is called

1. Area centralis

2. Fovea centralis

3. Blindspot

4. Ora Serrata

Mark the part of brain where neural impulses transmitted by optic nerve are analysed and image formed on the retina is recognized based on earlier memory and experience

1. Optocoel

2. Optic lobe

3. Visual cortex area

4. Frontal lobe in occipital lobe

Which of the following is not a correct statement with respect to the human eyes?

1. When all cones are stimulated equally, a sensation of white light is produced. The sensations of different colours are produced by various combination of these cones and their photopigments

2. Fovea of macula lutea has the greatest visual activity and resolution

3. Cones produces daylight (Photopic) vision and rods produces twilight (Scotopic) vision

4. Ciliary muscles contract when we focus our eyes on a far-placed object