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The eye is covered by three layers called the sclerotic layer or sclera, choroid layer and retina.

Correct option is A) Pellagra

Sclera: One of the three layers that cover the eye. It is the outermost thick, tough, fibrous, non – elastic and white coloured layer.

Stapes: The last one of the three bones present in the middle ear. All these three bones amplify vibrations received on the tympanum membrane.

Vestibular nerves: Nerve fibres from vestibule forms vestibular nerve.

Vestibular membrane: It separates vestibule and semilunar canals.

Cochlear nerve: Cochlear nerve fibres from the cochlear nerve.

Suspensory ligaments: Biconvex lens ¡s present behind the pupil and is attached to suspensory ligaments.

Auditory nerve: It is formed by the union of vestibular and cochlear nenes.

The hairs and mucous in the nasal cavity kept dust, germs and other unwanted materials away from gaining entry into our bodies through the nose.

The impression of an image stay in the retina for about 1/16th of a second. If the still images of an object are flashed at the rate faster than 16 per second, the eye receive it as moving. In this way we see movies.

• Taking bath regularly 
• Use soap to clean the body
• In any redness, itching, discoloration and rashes appear we consult the dermatologist

a) Tactile receptors for skin 

b) Pacinian corpuscles for pressure 

c) Nociceptors for temperature etc.

• Yes, our sense organs work together. 
• Every single function of the body is managed and controlled by the brain, including our organs and senses. 
• Otherwise, we would have different interpretations of a stimulus, resulting confusion. 
• But to be clear it is not the organs working together it is the brain constantly receiving stimuli from different senses. 
• The brain is responsible for assimilating information and filling the pieces together.

B) Both a, b are correct

C) a – 3, b – 2, c – 1

The answers is True.

• To collect and transform vibrations produced by sound to nerve impulses to be carried to the brain. 
• To maintain balance or equilibrium.

False

Correct statement: 

Ear helps in hearing and also in maintaining the equilibrium of our body.

a) Hearing 

b) Maintaining equilibrium of the body.

Cornea protects the eye from direct exposure to light.

• The colour of the skin is due to the presence of ’Melanin”.
• Due to this, the skin is sensitive to touch, temperature and pressure.

C) Skin colour

Melanin: It Is a pigment, responsible for the colouration of the skin.

• Moving our hand from a hot object is an unconditional reflex. 
• Unconditional reflexes are inherited and shown from birth. 
• Unconditional reflexes are present in all individuals and are basically same.

To cool or too hot food material causes damage the sense of smell. It also damage the taste buds. If we take too cool or too hot food materials we will loose sense of smell and taste.

• The purpose of eyelashes is to keep moisture like sweat from setting into our eyes. 
• Eyelashes protect the eye from debris and they are sensitive to being touched. 
• If lashes are absent moisture like sweat will not be setting into our eyes. 
• There will not be protection from debris to our eyes.

Cochlea: It is the third part of the membranous labyrinth. It is spiral-shaped.

• I will show utmost sympathy forwards disabled people who is lacking sensory organs. 
• I will give my full cooperation in leading normal lives. 
• With my deeds I will bring confidence among the disabled people. 
• If the disabled people are blind everyday I will show the way to school and from school to home. 
• I will see that the disabled people get the government help in a proper way. 
• I will give my support to deaf people by giving symbols and signals to understand things.
• I will join the disabled people who are in the school age in the school mend for them.

Filiform papillae: Small prominences or Flakes on the tongue. They are thin, ‘V’ shaped but do not contain taste buds. Numerous in number not involved in gestation. Mechanical in function.

Vallarta papillae: These are dome-shaped structures on the tongue. Their number varies from eight to twelve. They get afferent taste nerves from the cranial nerve, glass pharyngeal.

Foliate papillae: These are the bump-like structures present on the sides of the tongue.

Correct option is D) Skin

A) Leucoderma

D) We can hear sound as the particles of air are vibrated and waves are formed

Lachrymal glands secrete tears for lubrication and also prevent dehydration of various mucus membranes.

Malleus: The first bone of the three bones present in the middle ear.

Lachrymal glands: Present in eye. They secrete lubricant for the eye aiding in the movement of the eye.

Correct option is C) 2, 3

Olfactory receptors or smell receptors are present in the mucus membrane of the nasal cavity.

Olfactory receptors are present in nose.

FUNCTION :- It helps in smelling

A) lachrymal glands

Leucoderma: Disease due to the deficiency of melanin.

D) All are correct

Correct option is D) 2 only

A) stimulants

• Brain is the centre for all the sensitive activities. 
• It receive information in the form of nerve signals through sensory nerves.It interpret the information sends off signals through another type of nerves called as motor nerves. 
• Motor nerves take the signals to parts that show response. 
• For example, when a mosquito bits you on your leg the sensation is carried to the spinal cord through sensory nerves. 
• The spinal cord sense the message to the hand to kill the mosquito through motor nerves. Then we kill it.

The brain is the centre of all sensitive activities.

Correct option is D) all

C) sensory nerves

Correct option is B) brain