Question

light passes through the following structures in which order?
vitreous humor, lens, aqueous humor, cornea
cornea, aqueous humor, lens, vitreous humor
cornea, vitreous humor, lens, aqueous humor
aqueous humor, cornea, lens, vitreous humor
20 multiple choice 1 point
the only ossicle which articulates with two other ossicles:
incus
malleus
abacus
stapes
21 multiple choice 1 point
name the neural layer of the eye.
sclera
cornea
choroid
retina

Explanation:

Question 1 (Light passage order)

To determine the order light passes through eye structures, recall the eye's anatomy: light enters through the cornea first, then the aqueous humor (in the anterior chamber), then the lens, and finally the vitreous humor (in the posterior chamber). So the correct sequence is cornea, aqueous humor, lens, vitreous humor.

The ossicles in the middle ear are malleus, incus, and stapes. The incus (anvil) articulates with both the malleus (hammer) and the stapes (stirrup). Malleus articulates with incus (one), stapes articulates with incus (one), and abacus is not an ossicle. So incus is the ossicle that articulates with two others.

The eye has three layers: fibrous (sclera, cornea), vascular (choroid), and neural. The neural layer is the retina, which contains photoreceptors and neural cells for vision. Sclera and cornea are fibrous, choroid is vascular.

Answer:

B. cornea, aqueous humor, lens, vitreous humor

Question 2 (Ossicle articulation)