Tag: biology

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Questions Related to biology

Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

Which of the following is transparent in nature?

  1. Conjuctiva

  2. Cornea

  3. Iris

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. Conjunctiva is a transparent membrane that lines the eyelids. It protects the delicate cornea.
B. Cornea is a transparent layer that forms the front of eyes. It is the anterior portion of sclera, a dense connective tissue which maintains the shape of eye and also protects it.
C. Iris is an opaque and pigmented structure in the eye. It controls the size of pupil and thus, regulates amount of light entering the eye.
Hence, conjunctiva and cornea are transparent. So, both options A and B are correct.
So, the correct answer is 'Both A and B'.
Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

Anterior chamber of the eye is the space between

  1. Lens and iris

  2. Cornea and iris

  3. Lens and retina

  4. Cornea and lens
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • The anterior chamber of the eyeball is the part of the human eye with the chamber at right.
  • The anterior chamber is the aqueous humor-filled space inside the eye between the iris and the cornea's innermost surface, the endothelium.
So, the correct option is 'lens and iris'.

Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

Which of the following is the clean window in the sclera in front of iris ?

  1. $Conjuctiva$
  2. $Pupil$
  3. $Cornea$
  4. $Choroid$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The cornea is the clear, dome-shaped outer surface of the eye covering the front of the iris, pupil, and anterior chamber, functioning as a clean window that helps focus light.

Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

Suspensory ligaments are found in

  1. Brain

  2. Eye

  3. Ear

  4. Kidney
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Many suspensory ligaments are attached radially around the lens that serve to pull the edges of lens edges toward the outer circle of the eyeball. They maintain the relatively flat shape of the lens under normal conditions of the eye.

Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

Supporting cells of retina is

  1. Dieters cells

  2. Hensen's cells

  3. Muller cells

  4. Amacrine cells
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Supporting cells of the retina is Muller cells also known as Muller glia. They are a type of retinal glial cells, first recognized and described by Heinrich Muller. They are found in the vertebrate retina, which serves as support cells for the neurons of the retina.

The major function of the Müller cells is to maintain the stability of the retinal extracellular environment by regulation of K+ levels, uptake of neurotransmitters, removal of debris, storage of glycogen, electrical insulation of receptors and other neurons, and mechanical support of the neural retina. So, the correct answer is option C.

Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

Pigmented layer in eye is called as

  1. Cornea

  2. Sclerotic

  3. Choroid

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The retina makes up the inner layer and occupies only the posterior two-third of the eye. The retina consists of several layers of cells, including the rods and cones, the sensory cells, that respond to light. The tips of the rods and cones are embedded in a pigmented layer of cells on the back of the retina. The pigment helps prevent light from scattering in the back of the eye. 

Multiple choice biology human brain and sense organs introduction to sense organs eyes and their function the structure and function of the eye

Largest eyes amongst land animals is of

  1. Elephant

  2. Deer

  3. Ostrich

  4. Man
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Ostriches have the biggest eyes of all land mammals. The ostrich needs large eyes for its terrestrial lifestyle sharing the savanna as it does with an alarming army of fearsome predators. It is a flightless bird with strong hindlimbs to run.

So, the correct answer is option C.