lab 11

Question 1

what is the role of suspensory ligaments?

Answer 1

hold the lens in place. works with the ciliary muscs to control the shape of the lens.

Question 2

what is the role of ciliary muscles?

Answer 2

control the shape of the lens

Question 3

what provides aqueous humor?

Answer 3

ciliary processes that contain capillaries to produce aqueous humor.

Question 4

what is myopia? how are the cil musc and ligaments? what corrective lens do you need?

Answer 4

near sightedness. occurs when objects focus in front of the retina and results in seeing close objects without a problem, but distant objects are blurred.
cil musc are contracted, ligaments are relaxed, lens thickens.
you need a diverging lens that allows light to converge at correct point.

Question 5

what is hyperopia? how are the cil muscs and ligament? what corrective lens do you need?

Answer 5

far sightedness. occurs when objects are focused behind the retina and results in seeing distant objects clearly but close objects are blurred.
cil muscs are relaxed, ligaments are stretched, lens is thin.
you need converging lens which starts the refraction of light sooner.

Question 6

what is the sclera

Answer 6

whites of the eye, provides shape

Question 7

cornea

Answer 7

allows light to enter eye and helps refract (bend) light rays so they focus at the retina.

Question 8

iris

Answer 8

controls how much light is let into eye. coloured part of eye. controls pupil

Question 9

what is the choroid

Answer 9

contains blood vessels and absords excess light

Question 10

retina

Answer 10

contains nerves to detect light

Question 11

optic disc

Answer 11

blind spot where optic nerves exit to brain

Question 12

what is an astigmatism?

Answer 12

the cornea or lens has an irregular surface curvature which makes things blurry.

Question 13

what is the pathway of light in the eye?

Answer 13

corneato pupil to lens to retina. The cells in the retina absorb and convert the light to electrochemical impulses which are transferred along the optic nerve and then to the brain.

Question 14

what is the pathway of sound thru the ear?

Answer 14

Sound waves enter the outer ear (auricle/pinna) and travel through external auditory canal, which leads to the tympanic mem. The tympanic mem vibrates from the incoming sound waves and sends these vibrations to the 3 temporal bones, malleus, incus, and stapes. vibrations go to the oval window which then go to the auditory tube. then enters the cochlea connected to the vestiblue which also connects to the semicircular canals. vibrations are then sent to auditory nerves to send it to the brain where it will be translated to sound.

Question 15

what is static equilibrium?

Answer 15

evaluate position of head in space with respect to gravity and linear acceleration in straight line speed and direction.

Question 16

what is dynamic equilibrium?

Answer 16

evaluate posiotion of head in angular rotation movements

Question 17

where are receptors for hearing located?

Answer 17

cochlea

Question 18

where are dynamic equilibrium receptors located?

Answer 18

within the semicircular ducts in the semicircular canals

Question 19

where are static equilibrium receptors located?

Answer 19

within the chambers of the membrous labyrinth called the saccule and utricle in the vestibule

Question 20

what is olfactory adaptation?

Answer 20

temporary inability to distinguish a particular odor after a prolonged exposure to that odor.

Question 21

what are the 5 tastes?

Answer 21

sweet, salty, bitter, umami, and sour.