Ch. 1 Visual System

Question 1

The visual system takes in info from the environment in the form of ___ and analyzes/interprets it.

Answer 1

Light

Question 2

Eye made up of 3 coats/tunics:

Answer 2

1. Cornea and sclera - outer fibrous layer of CT
2. Iris, CB, choroid (uvea) - middle vascular layer
3. Retina - inner layer

Question 3

Sclera -

Answer 3

Opaque white and covered by transparent conj

Question 4

Cornea -

Answer 4

Transparent and allows lights rays to enter the globe and by refraction, helps bring these light rays into focus on the retina

Question 5

Limbus -

Answer 5

Transition from cornea to sclera and conj

Question 6

Iris -

Answer 6

Acts as diaphragm to regulate amount of light entering pupil

Question 7

The 2 iris muscles are supplied by the ___ nervous system

Answer 7

Autonomic

Question 8

CB is continuous w the ___ at its root

Answer 8

Iris

Question 9

CB produces the components of the ___ and contains the muscle that controls the shape of the ___.

Answer 9

Aqueous humor; lens

Question 10

Choroid is the posterior part of the ___ and is an anastomosing network of blood vessels w a dense capillary network

Answer 10

Uvea

Question 11

___ changes light energy into signal that passes through the retina and exits the eye through the ___

Answer 11

Retina; optic nerve

Question 12

___ is bounded in front by the cornea and posteriorly by the iris and the ant surcface fo the lens

Answer 12

Anterior chamber

Question 13

___ lies behind the iris and surrounds the equator of the lens, separating it from the CB

Answer 13

Posterior chamber

Question 14

Aqueous humor is produced by teh ___ and provides nourishment for the ___ and the ___

Answer 14

CB; cornea; lens

Question 15

The vitreous humor contains gel like substance ___

Answer 15

Vitreous humor

Question 16

Sagittal divides structures into:

Answer 16

Left and right halves

Question 17

Coronal/frontal is a ___ plane and divides structures into ___ and ___ parts

Answer 17

Vertical; anterior; posterior

Question 18

Transverse is a ___ plane and divides structures into ___ and ___ parts

Answer 18

Horizontal; superior; inferior

Question 19

Hyperopia = ___

Answer 19

Farsightedness

Question 20

Hyperopia, the distance from the cornea to the retina is too short for the refractive power of the cornea and lens = images come into focus ___ the retina

Answer 20

Behind

Question 21

Myopia = ___

Answer 21

Nearsightedness

Question 22

Myopia, lens and cornea are too strong or the eyeball is too long = images come into focus ___ of the retina

Answer 22

In front

Question 23

T/F: Hyperopia = convex lens = increase convergence

Answer 23

T

Question 24

T/F: Myopia = concave lens = light rays diverge

Answer 24

T

Question 25

Body structures made of four basic tissues:

Answer 25

1. Epithelial 2. Connective 3. Muscle 4. Nerves

Question 26

___ lies on the basement membrane that attaches them to underlying ___

Answer 26

Epithelial cells; CT

Question 27

Basement membraned divided into 2 parts:

Answer 27

1. Basal lamina - secreted by epi cells | 2. Reticular lamina - product of CT

Question 28

Free surface of epi cell = ___ Surfaces that face underlying tissues or rests on the basement membrane = ___

Answer 28

Apical surface Basal surface

Question 29

Endothelium = ___ squamous layer that lines certain cavities

Answer 29

Simple

Question 30

___ glands secretes into a duct

Answer 30

Exocrine

Question 31

___ glands secretes into the bloodstream

Answer 31

Endocrine

Question 32

___ glands secrete complete cells w secretory matl

Answer 32

Holocrine

Question 33

___ glands secretes part of the cell cytoplasm

Answer 33

Apocrine

Question 34

___ glands is a product of the cell wo loss of any cellular components

Answer 34

Merocrine

Question 35

CT provides structure and support and consists of: ___

Answer 35

Cells (fibroblasts, mast, macrophages) Fibers Ground substance