Brain stem is/has not

  • Mid brain

  • Cerebellum

  • Medulla oblongata

  • Connection between brain and spinal cord

Reflex action does not involve

  • Conscious thought

  • PNS

  • Involuntary response

  • Both B and C

The ……. receive signals from …….and transmit it via …….nerve root

  • Afferent neurons, sensory organs, dorsal

  • Afferent neurons, effector organs, ventral

  • Efferent neurons, sensory organs, ventral

  • Efferent neurons, effector organs, dorsal

Which of the following is a reflex action?

  • Sudden withdrawal of body part, when it comes in contact of hot body

  • Knee jerk reflex

  • Controlling sleep pattern

  • More than one options are correct.

Which of the following is not associated with sense organ nose?

  • Nose contains mucus coated receptors which are specialised for receiving the sense of smell

  • Olfactory epithelium with five kinds of cells

  • Brain's limbic system's extensions are olfactory bulb

  • Both B and C

The mucus coated receptors which are specialised for receiving the sense of smell are known as

  • Olfactory receptors

  • Gustatory receptors

  • Optic receptor

  • Touch receptor

Which of the following sense organs detect dissolved chemicals?

  • Tongue

  • Nose

  • Ear

  • Both 1 and 2

Which of the following two senses are functionally similar and interrelated?

  • Optic sense and olfaction

  • Auditory sense and optic sense

  • Olfaction and Gustation

  • Gustation and auditory

Which of the following is wrong about eyes?

  • An adult human eye ball is nearly a spherical structure
  • Our paired eyes are located in sockets of the skull called orbits
  • The wall of the eye ball is composed of three layers
  • The external layer is composed of loose connective tissue and is called sclera

Cornea is

  • Anterior portion of choroid

  • Anterior portion of sclera

  • Posterior portion of sclera

  • Anterior portion of retina

Which of the following is wrong about choroid?

  • devoid of blood vessels

  • Middle layer

  • It looks bluish in color

  • Forms ciliary body

Choroid layer is …….over posterior two third region.

  • Thin

  • Thick

  • Ciliary

  • Both B and C

Which of the following is not associated with Iris?

  • Ciliary bodies form it

  • Pigmented and transparent

  • Visible colored part of the eye

  • Present in anterior part of eye

Eye-Lens is not

  • Transparent

  • Crystalline

  • Held in place by tendons attached to the ciliary body

  • Both A and C

Pupil of human eye has not which of the following properties?

  • In front of the lens

  • The aperture surrounded by the Iris

  • Diameter of the pupil is regulated by collagen fibres of Iris

  • All of these

Which of the following is wrong with respect to Retina?

  • Innermost layer of eye

  • Three layers of neural cells

  • Ganglion is outermost cell

  • Rods and Cones are the photoreceptors over there

The neural cells of Retina of eye are-.      

a. Bipolar cell

b. Ganglion cell

c. Photoreceptor cells

Arrange them in order from inside to outside.

  • bca

  • abc

  • bac

  • None of these

Which of the following is true regarding photoreceptor cells?

  • Have light sensitive glycoproteins

  • Photopic vision is function of rods

  • Scotopic vision is function of cones

  • Color vision is function of cones

The rods contain

  • A purplish red protein called the rhodopsin or visual purple

  • A yellow red pigment called leutopsin or visual yellow

  • A brown yellow pigment called rhodopsin or visual brown

  • Both A and B

Rhodopsin

  • Is a derivative of vitamin A

  • Has a derivative of vitamin A

  • Has vitamin A

  • Is vitamin A

Which of the following lights is not responded by photo pigments which are present in human eye?

  • Red

  • Green

  • Blue

  • Yellow

Sensation of white light is produced when

  • When rodes are stimulated more than cones

  • When cones are equally stimulated

  • When rodes are equally stimulated

  • When cones are stimulated more than rodes

The point where optic nerve leave and the retinal blood vessels enter it is

  • A point left to and slightly down the posterior pole of the eyeball

  • A point medial to and slightly above the posterior pole of eye ball

  • A point right to and slightly above the posterior pole of eyeball

  • A point medial to and slightly down the posterior pole of the eyeball

Blind spot is not

  • Photoreceptor cells are not present in blind spot

  • Retinal blood vessels enter at that point

  • Optic nerves leave the eye at this point

  • Is slightly below the posterior pole of the eyeball.

Yellow spot of eye is

  • At the posterior pole of the eyeball which is lateral to the blind spot

  • At the anterior pole of the eyeball which is above to the blind spot

  • At the anterior pole of the durbal which is lateral the blind spot

  • At the posterior pole of the eyeball which is below the blind spot

Macula lutea …a...

Fovea…b....

  • Yellow spot, dark spot

  • Yellow spot, pit

  • Pit, yellow spot

  • Dark spot, pit

Fovea is not

  • Central pit of yellow spot

  • Thinned out portion of the retina

  • Only cones are densely packed here

  • Visual acuity is least here

The greatest resolution or visual acuity is found in

  • Fovea

  • Yellow spot

  • Blind spot

  • Retina

Aqueous humor is found in

  • The space between cornea and the lens

  • The space between choroid and lens

  • The space between retina and lens

  • The space between sclera and lens

These are events of mechanism of vision. Arrange them in order.

a. Light rays are focussed on retina

b. Dissociation of the retinal and of opsin

c. Generation of impulses in rods and cones

d. Changes in the structure of the opsin

e. Generation of potential difference

f. Change in membrane permeability

g. Transmission of action potential by the optic nerves to the visual cortex area of the brain

h. Generation of action potential in photoreceptors

i. image formation in retina and recognition based on earlier memory and experience.

  • a-c-b-d-f-e-h-g-i

  • a-b-c-d-e-f-g-h-i

  • b-c-d-e-f-i-g-a-h

  • b-d-c-f-g-i-a-e-h

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Practice Zoology Quiz Questions and Answers