BIOL251 Human Anatomy & Physiology I w/Lab | Module 8 Exam Review |70 Questions and Answers Summary |Portage Learning

ESTUDYR



BIOL251 Human Anatomy & Physiology I w/Lab |
Module 8 Exam Review |70 Questions and Answers
Summary |Portage Learning


Question 1

Which opening in the eye allows light to enter the anterior segment and changes
diameter to regulate the amount of light?

● Cornea
● Lens
● ✅Pupil
● Iris

Rationale: The pupil is the aperture in the center of the iris that controls light
entry. The iris muscles adjust pupil size depending on light intensity.

,ESTUDYR




Question 2

Which structure produces the majority of the aqueous humor that circulates in the
anterior chamber of the eye?

● Sclera
● Lens
● ✅Ciliary body
● Vitreous humor

Rationale: The ciliary body contains ciliary processes that secrete aqueous humor,
maintaining intraocular pressure and providing nutrients to avascular structures
like the lens and cornea.




Question 3

Which structure of the eye is responsible for focusing light on the retina by
changing its shape?

, ESTUDYR


● Cornea
● Iris
● ✅Lens
● Vitreous humor

Rationale: The lens adjusts shape via ciliary muscle contraction or relaxation,
allowing fine focusing of images on the retina (accommodation).




Question 4

Which layer of the eye contains photoreceptors responsible for detecting light and
color?

● Sclera
● Cornea
● ✅Retina
● Choroid