Question

activity 17 : quiz
module : nervous
topic : structures / type: combination

what structure is highlighted?

a. retina
b. ciliary body
c. choroid
d. lens
e. posterior cavity

Explanation:

Identify the highlighted structure

Using the Eye Anatomy and Lens Structure knowledge points, we analyze the histological section of the eye. The highlighted region is the prominent, biconvex structure located in the anterior segment of the eye, directly behind the pupil and iris. This structure is the lens, which is highlighted in a yellowish-green color overlay.

Correlate with options

Using the Ocular Histology knowledge point, we evaluate the given multiple-choice options:

• A. Retina: The innermost neural layer at the back of the eye (not highlighted).
• B. Ciliary body: The thickened portion of the vascular tunic that connects the choroid with the iris (not highlighted).
• C. Choroid: The highly vascular middle layer of the eye wall (not highlighted).
• D. Lens: The transparent, biconvex structure that focuses light onto the retina, which matches the highlighted region.
• E. Posterior cavity: The large space behind the lens filled with vitreous humor (not highlighted).

Answer:

• (A) Retina
• (B) Ciliary body
• (C) Choroid
• (D) Lens (Correct answer)
• (E) Posterior cavity