Multiple choice

Which of the following is not the function of lacrimal fluid?

  1. Taking the main nutrients to the cornea

  2. Carrying waste products away from the cornea

  3. Carrying melanin pigment to the cornea

  4. Helping to prevent corneal infection

  5. Maintaining the tonicity of the tear film
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The lacrimal glands secrete lacrimal fluid, which flows through the main excretory ducts into the space between the eyeball and lids. The brown or black pigment, melanin, present in melanocytes of the iris of the eye is not carried by the lacrimal fluid. So, this is not done by lacrimal fluid.

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