Tag: human brain and sense organs

Quizzes (2) Questions (112)

Questions Related to human brain and sense organs

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

A 22 years student goes to his ophthalmologist. He has problem in reading books, because he is not able to contract his

  1. Suspensory ligament

  2. Pupil

  3. Iris

  4. Ciliary muscles
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The ciliary muscle is located in the eye and surrounds the lens. It is smooth circular muscle, that relaxes or tightens the zonules to enable the lens to change shape for focusing. When it contracts, it pulls forward, moving to a frontal portion to relax the fibers, that hold the lens in place; this process also allows it to take on a more spherical shape to provide short range focus.

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

Where is the image of an object formed in human eye?

  1. Iris

  2. Pupil

  3. Retina

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

  • The retina is the innermost, light-sensitive layer of tissue of the eye of most vertebrates and some molluscs.
  • The optics of the eye create a focused two-dimensional image of the visual world on the retina, which translates that image into electrical neural impulses to the brain to create the visual perception.
  • The retina serving a function analogous to that of the film or image sensor in a camera. Hence, the retina  is the image of an object formed in the human eye.
So, the correct answer is 'retina'.

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.