Tag: sense organs in animals

Questions Related to sense organs in animals

The total sleeping time of newborn baby is

evs super senses sleeping time animal senses sense organs in animals

  1. 20 hours a day

  2. 10 hours a day

  3. 16 hours a day

  4. None of the above

Show answer
Correct Option: C
Explanation:

  • New born baby sleeps up to 16-17 hours a day.
  • One of the reasons behind what appears to be excessive babies' sleep is the fact that the baby is still adjusting to a new environment, and experiencing a rapid bit of growth at the same time. Proper development demands that babies sleep a lot. Growth hormones are secreted by the pituitary gland at a much faster rate while babies sleep.
Hence, the correct answer is '16 hours a day'.

Which of the following shows aestivation? 

evs super senses sleeping time animal senses sense organs in animals

  1. Bees

  2. Sparrow

  3. Rat

  4. Cat

Show answer
Correct Option: A
Explanation:

Aestivation is the type of summer sleep, performed by cold-blooded animals. It helps in maintaining the body temperature by avoiding the excessive water loss and any internal body damaged due to high temperatures. It is performed by bees, snails, earthworms, salamanders, frogs, earthworms, crocodiles, tortoise, etc.

So, the correct option is 'Bees'.

Identify the animal with shortest sleeping time.

evs super senses sleeping time animal senses sense organs in animals

  1. Sloth

  2. Crocodile

  3. Cow

  4. Giraffe

Show answer
Correct Option: D
Explanation:


  • Giraffes have the shortest sleep requirements of any mammal, with an average of just 30 minutes per day.
  • They sleep in a reclined position with their long necks curled right round and their heads resting on their rears.
So, the correct option is 'Giraffe'.

Which of the following adjust the size of pupil?

evs the unique world of insects and animals sleeping time animal senses sense organs in animals

  1. Sphincter muscles

  2. Opthalmoscope

  3. Iris dilator

  4. Both A and C

Show answer
Correct Option: B
Explanation:

The iris is the coloured circular structure concentrically surrounding the center of the eye, the pupil, which appears to be black. The size of the pupil, which controls the amount of light entering the eye, is adjusted by the iris's dilator and sphincter muscles. A device known as an ophthalmoscope is used to see inside the eye. Therefore, the correct answer is option B.

Receptors of pressure present in deep layers of skin are 

evs the unique world of insects and animals sleeping time animal senses sense organs in animals sense organs in humans

  1. Krause's end bulb

  2. Meissner's corpuscles

  3. Corpuscles of Ruffini

  4. Pacinian corpuscles

Show answer
Correct Option: D
Explanation:

Meissner corpuscles are one of the three types of cutaneous receptors which are sensitive to fine touch. Three types are cutaneous receptors are sensitive to pressure which are namely Pacinian corpuscles, Ruffini endings and Krause end bulbs. Out of these, onion-shaped Pacinian corpuscles lie deep inside the dermis. The Ruffini endings are present deeper in epidermis near the base while the Krause end bulbs are present in specialized regions only, for example, conjunctiva of eyes, mucous membrane of lips and tongue etc. Thus, the correct answer is option D.

Tactile receptors in mammals are maximum on

evs the unique world of insects and animals sleeping time animal senses sense organs in animals sense organs in humans

  1. Body

  2. Limbs

  3. Face

  4. Head

Show answer
Correct Option: C

Which of the following organ senses temperature?

evs the unique world of insects and animals sleeping time animal senses sense organs in animals sense organs in humans

  1. Tongue

  2. Nose

  3. Skin

  4. None of the above

Show answer
Correct Option: C
Explanation:
  • Sensitivity to temperature is a skin sense that is related to the human need to maintain internal temperature balance or thermal homeostasis. 
  • When the body becomes hotter than the normal temperature the sweat glands releases sweat which in turns cools the skin as it evaporates. This helps the lower internal temperature of the body
  • Hence the organ which senses temperature is skin.
  • So, the correct answer is 'Skin'.

$CO _{2}$, $pH$ and $O _{2}$ level in the blood is detected by which receptors?

evs the unique world of insects and animals sleeping time animal senses sense organs in animals sense organs in humans

  1. Baroreceptors

  2. Chemoreceptors

  3. Sensoryreceptors

  4. Baroreceptors and Chemoreceptors

Show answer
Correct Option: B
Explanation:
Chemoreceptors present in the carotid body, venacava and aortic sinus and responsible for receiving change in chemical composition of blood. CO$ _2$, pH and O$ _2$ levels in the blood are detected by the central chemoreceptors. Changes in CO$ _2$ level in blood is detected by chemoreceptors present in carotid bodies, O$ _2$ level is detected by the chemoreceptors present in Aortic bodies and changes in pH is detected by chemoreceptors present in the venacava and also that of carotid bodies and aortic bodies.
So, the correct answer is B.

Which of the following detect mechanical energy associated with, changes in pressure, position, or acceleration?

evs the unique world of insects and animals sleeping time animal senses sense organs in animals sense organs in humans

  1. Chemoreceptors

  2. Photoreceptors

  3. Mechanoreceptors

  4. Thermoreceptors

Show answer
Correct Option: C
Explanation:

(A)Chemoreceptor - Receptor that responds to chemicals.

(B)Photoreceptor - Receptor that responds to light.
(C)Mechanoreceptor - Receptor that responds to pressure, position, acceleration.
(D)Thermoreceptor -Receptor that responds to heat.
So, the correct option is 'Mechanoreceptor'.

What is otorhinolaryngology?

evs the unique world of insects and animals sleeping time animal senses sense organs in animals sense organs in humans

  1. Care of ear

  2. Study of larynx

  3. Study of ear and larynx

  4. Study of diseases of the ear, nose and throat

Show answer
Correct Option: D
Explanation:
  • Otorhinolaryngology is a surgical subspecialty within medicine that deals with the conditions of the ear, nose and throat (ENT) and related structures of the head and neck. It is also called as otolaryngology. Otorhinolaryngologist treats the disease of the ear, nose, throat, base of the skull and for the surgical management of cancers and benign tumours of the head and neck. Hence, otorhinolaryngology is the study of disease of the ear, nose and throat.
  • So, the correct answer is 'study of disease of the ear, nose and throat'.