Assessment Anatomy & Physiology 2

Question 1

What is/are the purpose(s) of theZonules of Zinn?

Answer 1

Control the shape of the crystalline lens with contraction and relaxation of the ciliary muscle
Hold the crystalline lens in place

Question 2

The retina is composed of how many layers and /or membranes?

Answer 2

Ten (RPE Retinal Pigment Epithelium, Photoreceptor Layer, External Limiting Membrane, Outter Nuclear Layer, Outter Plexiform Layer, Inner Nuclear Layer, Inner Plexiform Layer, Ganglion Cell Layer, NFL Nerve Fiber Layer, Internal Limiting Membrane)

Question 3

Uveal vessels, either directly or indirectly, provide metabolic needs and/ or nutrients to which of the following? Iris, Ciliary body, Outer retinal layer.

Answer 3

All

Question 4

The term for the adjustment in lens shape along with concurrent constriction or dilation of the pupil is referred to as amplitude of accommodation?

Answer 4

False (This is Accommodation, NOT Amplitude of accommodation which is the maximum amount the crystaline lens can accommodate or change shape)

Question 5

The Posterior Chamber is a….

Answer 5

Ring-shaped structure

Question 6

The physiological blind spot that exists some 15 degrees temporal to straight ahead vision corresponds to what area(s) of the retina?

Answer 6

Optic Disc

Question 7

The two Muscles that form the structure of the iris work in conjunction with each other?

Answer 7

False (they work in opposition)

Question 8

What is the largest chamber within the eye?

Answer 8

Vitreous chamber

Question 9

What will result in a rise in intraocular pressure?

Answer 9

If too much aqueous is produced too quickly.

If ther is a blockage in the trabecular meshwork.

Question 10

The thickness of the crystalline lens changes throught a persons life?

Answer 10

True

Question 11

According to the information in this course, what is considered the normal range of intraocular pressure messurement?

Answer 11

10 - 21 mmHg (mercury)

Question 12

Which structures connects with veins that carry the aqueous humour away from the eye?

Answer 12

Canal of Schlemm

Question 13

What connects the crystalline lens to the ciliary muscle?

Answer 13

Zonular fibers

Question 14

Information from the left half of the visual field of the right eye is transmitted to which of the following for visual processing?

Answer 14

Right visual cortex (left side of VF of Right Eye stays on Right VF)

Question 15

Between which of the following structures is the retina located?

Answer 15

Choroid and and the vitreous

Question 16

Signals from the retinal cones are sent to the brain where the perception of color is translated?

Answer 16

True

Question 17

The ophthalmic artery branches from which artery?

Answer 17

Internal carotid artery

Question 18

Which of the following represents the first synapse in the sensory visual pathway?

Answer 18

Photoreceptor to bipolar cell

Question 19

Which layer of the retina is closest to the choroid?

Answer 19

Retinal Pigment Epithelium

Question 20

Temporal and nasal retinal fibers from each eye cross at the optic chiasm to the opposite side of the brain?

Answer 20

False (Only Nasal fibers cross over NOT Temporal Fibers)