ch 17 hw a&p1

The abnormality that develops when a lens loses its transparency is known as ______

A cataract

The ciliary muscle contracts to ________

Adjust the shape of the lens for near vision

The first step in the process of olfaction is ______

An odorant molecule binding to a specific protein

The space between the cornea and the iris is the ______

Anterior chamber

In glaucoma, increasing pressure due to fluid build-up in he chambers of the eye can lead to nerve damage and ultimately lead to blindness. What is the name of the fluid in the anterior chamber?

Aqueous humor

Which of these is NOT a division of the bony labyrinth?

Auditory ossicles

Before an olfactory receptor can detect an odorant, it has to ________

Bind to receptors in olfactory cilia

Relative movement of the ________ in the semicircular ducts signals rotation of the head.

Endolymph

The function of the auditory tube is to _______

Equalize air pressure on both sides on the tympanic membrane

The "white" of the eye is part of the ______ layer.

Fibrous

The region of the retina that contains only tightly packed cones is the ______

Fovea centralis

The membrane structures that respond to chemical stimuli to produce sweet, bitter, and umami sensations are called ______

G proteins

The cell of the retina that produces an action potential that goes to the brain is a ______

Ganglion cell

The cochlear receptors that provide our sense of hearing are ______

Hair cells

Amacrine and _____ cells facilitate or inhibit communication between photoreceptors and ganglion cells

Horizontal

Lacrimal glands produce a ______ fluid

Hypotonic

Under which condition for the release of neurotransmitters photo receptors be greatest?

In a pitch black room after 30 minutes

What are the three parts of the vascular layer of the eye?

Iris, choroid, and ciliary body

Olfactory glands secrete a thick, pigmented _____ that absorbs water.

Mucus

which of the following description applies to the term myopia?

Nearsightedness

The olfactory organ consists of the _______ and ________

Olfactory epithelium and Lanita propria

Which cranial nerve carries visual information from the eyeball to the brain?

Optic nerve

What would result from an invasion of micro organisms under the Eustachian tube?

Otitis media

The ________ ear collects sound waves and transmits them to the ______ ear, which contains auditory ossicles.

Outer;middle

Which of these is the correct pathway for transmission of visual information?

Photoreceptor-> bipolar cell-> ganglion cell

The space between the iris and ciliary body and the lens is the _______

Posterior chamber

What are the three color photoreceptors?

Red, blue and green cone

All visual pigments contain _______ derived from ________.

Retinal; vitamin A

Having to adjust to a dark room after walking in from bright light is because ??

Rods exposed to strong light need time to regenerate rhodopsin.

Name the largest portion of the fibrous layer

Sclera

What are the parts of the fibrous layer?

Sclera and cornea

Which of these is not one of the eye?

Scleral layer

Olfactory glands _________________

Secrete a pigmented mucus.

Gustatory receptors are found in _______

Some lingual papillae

The external acoustic meatus ends at the _________

Tympanic membrane

The chain of ossicles begins at the _______ and ends at the _______

Tympanic membrane; oval window

Which of the following is involved in the gustatory perception of an amino acid?

Umami receptors

The ________ convey information about head position with respect to gravity.

Utricle and saccule

What are parts of the bony labyrinth?

Vestibule, cochlea, and semicircular canals

An elongated outer segment containing membranous discs that is connected by a thin stalk to the inner segment best describes _______

A photoreceptor

The human lens focuses light on the photoreceptor cells by ________

Changing shape

What structure changes the shape of the lens for far and near vision?

Ciliary body

Which of the following lingual papillae has the largest number of taste buds?

Circumvallate papillae

During motion sickness, the brain receives conflicting signals regarding ones placement in space. Which of the following structures is least likely to be involved in motion sickness?

Cochlear duct

Which of the following is NOT a structure within the visual axis?

Conjunctiva

A ray of light entering the eye will encounter the following structures in which order?

Conjunctiva-> cornea-> aqueous humor-> lens-> vitreous body-> retina

What is the difference between rods and cones with respect to color vision?

Cons contain retinal attached to different forms of Opsin

During accommodation, the culinary muscle ______ and the suspending ligaments become ________ which in turn, cause the lens to become _______

Contracts;loose;round

In the human eye, most refraction occurs when light passes through the _________

Cornea

What is the structure that allows light to first enter the eye?

Cornea

what structure would not be found in the vascular layer of the eye?

Cornea