11.1 Eye

Question 1

What are the body’s general senses?

Answer 1

somatic senses (touch, pressure, pain, temp, proprioception)
Visceral sense (vision, hearing, equilibrium, taste, smell)

Question 2

What is the function of adipose tissue around the eye?

Answer 2

padding, insulation, protection

Question 3

what is the white part of the eye?

Answer 3

sclera

Question 4

what does the sclera consist of?

Answer 4

dense fibrous connective tissue forming a tough external coat

Question 5

what is the function of the sclera

Answer 5

protects and shapes the eyeball

provides sturdy anchoring site for the extrinsic eye muscles

Question 6

what is the transparent anterior portion of the sclera?

Answer 6

the cornea

Question 7

what is the function of the cornea

Answer 7

allows light to enter the eye and it helps bend light rays so they are focused on the photoreceptors in the retina

Question 8

how man extrinsic eye muscles are there?

Answer 8

6

Question 9

what type of muscle are the extrinsic eye muscles

Answer 9

skeletal muscles

Question 10

what is the function of the extrinisc eye muscles

Answer 10

provides rotary movements of the eye
focus for the eye for optimum vision
anchor the eye in the bony orbit

Question 11

what fluid is found in the anterior poriton of the eye

Answer 11

aqueous humour

Question 12

what is the function of aqueous humour

Answer 12

supplies nutrients and oxygen to the lens and cornea while carrying away wastes

Question 13

what are the 3 layers of tunics that make up the eye wall

Answer 13

outermost - sclera, cornea
middle - iris, ciliary body, choroid
inner??

Question 14

where is the iris?

Answer 14

it is the circular coloured portion of the eye that lies anterior to the lens

Question 15

what does the iris consist of?

Answer 15

two layers of muscle

inner circular and outer radial smooth muscles

Question 16

where are the iris muscles arranged?

Answer 16

around the pupil

Question 17

what happens when the circular muscles of the iris contract? when does this occur?

Answer 17

pupil becomes more constricted and less light enters the eye

close vision, bright light.

Question 18

what happens when the radial smooth muscles contracts? When does this occur

Answer 18

pupil dilates allowing for more light to enter the eye

far vision, dim light

Question 19

what fluid is found in the posterior poriton of the eye

Answer 19

vitreous humour

Question 20

what is the function of vitreous humour

Answer 20

transmits light
supports posterior surface of the lens
holds retina firmly against pigmented layer
contributes to intraoccular pressure

Question 21

what holds the lens in place?

Answer 21

suspensory ligaments

Question 22

what are suspensory ligaments attached to?

Answer 22

the lens and ciliary body

Question 23

other than the suspensory ligaments what are the ciliary bodies attached to?

Answer 23

the iris posteriorly

Question 24

what is the ciliary body made up of

Answer 24

ciliary processes and ciliary muscles

Question 25

what is the function of ciliary muscles

Answer 25

controls the shape of the lens

Question 26

what is the function fo the ciliary processes

Answer 26

produce aqueous humour

Question 27

what do the ciliary processes consist of

Answer 27

capiliaries