Exam IV

Created by acosta_i 

Upgrade to
remove ads

120 terms · A/P Fourth exam

A condition that can result from a deficiency of vitamin A.

night blindness

A condition of deafness that may result from otosclerosis

Conduction deafness

An inflammation of the lining of the middle ear.

Otitis media

. A condition often leading to blindness due to increased intraocular pressure.

glaucoma

The mucous membrane that lines the eyelids and is reflected over the anterior surface of the eyeball is the conjunctiva.

TRUE

The photoreceptor cells are sensitive to damage from light.

TRUE

Both the cornea and the lens are vascular

False

Sour taste receptors are stimulated by hydrogen ions of acidic food substances.

True

Retinal detachment always results in loss of vision

FALSE

The structure that allows equalization of the pressure in the middle ear with that outside the body is the external auditory meatus t/f

FALSE

. The bending of light rays is called reflection

False

the anterior chamber of the eye is filled with vitreous humor

false

Theoretically, an individual born without a middle ear would be able to hear by bone conduction with a hearing aid

TRUE

When we move from darkness to bright light, retinal sensitivity is lost, but visual acuity is gained

TRUE

. What is the main function of the rods in the eye

vision in dim light

What structure regulates the amount of light passing to the visual receptors of the eye?

Iris

Which of the follow types of neurons are replaced throughout adult life?

olfactory receptor cells

Farsightedness is more properly called ________.

hyperopia

Seventy percent of all sensory receptors are located in the ________.

A) eye

Ordinarily, it is not possible to transplant tissues from one person to another, yet corneas can be transplanted without tissue rejection. This is because the cornea ________.

has no blood supply

There are three layers of neurons in the retina. The axons of which of these neuron layers form the optic nerves?

ganglion cells

What prevents the eyelids from sticking together when the eyes close? form what GLand?

TARSAL GLAND SECRETIONS

Which statement about malnutrition-induced night blindness is most accurate

Vitamin supplements will reverse degenerative changes.

. Motion sickness seems to ________.

D) result from mismatch between visual and vestibular inputs

In the uterus ________.

despite the fact that the fetus cannot see, functional visual cortical connections are established

. Most newborns ________.
A) are myopic
B) often use only one eye at a time
C) see in tones of red and green only
D) cry with copious tears

B) often use only one eye at a time

The blind spot of the eye is where

the optic nerve leaves the eye

The eye muscle that elevates and turns the eye laterally is the ________.

inferior oblique

. Light passes through the following structures in which order

cornea, aqueous humor, lens, vitreous humor

Which statement about sound localization is not true?

It requires processing at the cortical level.

Visible light fits between ________.

D) UV and infrared

In humans, melatonin may inhibit sexual maturation

True

The antagonistic hormones that regulate the blood calcium level are calcitonin-parathormone

True

The hormone that raises blood sugar levels is insulin

False

Oxytocin is a strong stimulant of uterine contractions.

True

Iodine is an essential element required for the synthesis of thyroxine

True

. The size and shape of a pea; produces hormones that stimulate other endocrine glands.

hypophysis (pituitary)

The gland that controls the fight-or-flight reaction

Adrenal Medulla

. Produces hormones that regulate glucose levels in the body

Pancreas

Produces a hormone that controls blood levels of calcium and potassium by their removal from bone tissue.

Parathyroid

Produces the body's major metabolic hormones

Thyroid

Normal development of the immune response is due in part to hormones produced by the

Thymus gland

Which of the following is not a category of endocrine gland stimulus?

Enzyme

Chemical substances secreted by cells into the extracellular fluids and that regulate the metabolic function of other cells in the body are called ________.

hormones

. Steroid hormones exert their action by ________.

entering the nucleus of a cell and initiating or altering the expression of a gene

When it becomes necessary to enlist the fight-or-flight response, a hormone that is released during the alarm phase of the general adaptation syndrome is ________.

Epinephrine

One of the least complicated of the endocrine control systems directly responds to changing blood levels of ions and nutrients. Which of the following describes this mechanism?

humoral stimulation

The major targets of growth hormone are ________.

bones and skeletal muscles

Which of the following is true about calcium homeostasis?

Parathyroid hormone is the single most important regulator of calcium levels in the blood

Which organ does not have hormone production?

skin

What ion is sometimes used as a second messenger of amino acidbased hormones?

calcium

. ________ are hormones synthesized from cholesterol

Steroids

The largest pure endocrine gland in the body is the ________.

Thyroid

The ________ gland may influence our day/night cycles and even regulate the onset of sexual maturity.

pineal

The anterior chamber of the eye is filled with vitreous humor

false

Odorants must be volatile to be smelled

TRUE

What is the main function of the rods in the eye?

vision in dim light

Hyposecretion of the thyroid in adults.

Myxedema

Hypersecretion of the adrenal cortex.

Cushing's Disease

Hypersecretion of growth hormone

Acromegaly

Hyposecretion of the thyroid in infants

Cretinism

. Type 2 diabetics may reflect declining receptor sensitivity to insulin rather than decreased insulin production.

True

Most type 2 diabetics do not produce insulin

false

. Normal development of the immune response is due in part to hormones produced by the

Thymus gland

Chemical substances secreted by cells into the extracellular fluids and that regulate the metabolic function of other cells in the body are called

hormones

Thyroid hormone exerts its influence by ________.

A) entering some cells and binding to intracellular receptors within the nuclei

Sometimes prolonged excessive exposure to high hormone concentrations causes a phenomenon known as ________.

down-regulation

Steroid hormones exert their action by ________.

entering the nucleus of a cell and initiating or altering the expression of a gene

When it becomes necessary to enlist the fight-or-flight response, a hormone that is released during the alarm phase of the general adaptation syndrome is ________.

Epinephrine

The stirrup bone of the internal ear is also known as

Stapes...

The cochlear nerve transmits impulses to the auditory cortex located in

Temporal lobe

Lacrimal glands are located on which surface of the eye

medial superior

tough, white connective tissue forms this portion of the fibrous layer of the eye

Scerla

The gland that produces tears in the eye is called the:

lacrimal gland

The pupil is an opening within the

iris

Which layer of the eye contains rods and cones

iris

The gel-like substance that reinforces the eyeball and prevents it from collapsing inward

vitrious humor

What structure of the eye focuses light on the retina

lens

The inability to see distant objects is termed "nearsighted" or

myopia

The auditory ossicle called the "anvil" is also called the

Incus

Dynamic equilibrium receptors are found in the ear where?

semicurcular canals

Gustatory hairs are to taste as olfactory hairs are to

smell

Which one of the following is NOT a primary taste sensation

pungent

The only special sense that is NOT fully functional at birth is

hearing

White of the eye

Sclera.

Gland that releases tears

Lacrimal

Type of photoreceptor cell that detects colors

cones

Flexible biconvex crystal-like structure

lens

Transparent portion of the fibrous layer

cornea

Type of humor located in the posterior segment

vitrious humor

Contains millions of photoreceptors

Retina

Area of greatest visual acuity

Fovea centralis

Blind spot

Optic disc

Sugar, saccharine

sweet receptors

Oranges, tomatoes

sour receptors

Amino acid glutamate

unami receptors

Alkaloids

bitter

. Metal ions in solution

salty receptors

The olfactory receptors are responsible for the sense of taste

False

An enlargement of the thyroid gland resulting from a deficiency of dietary iodine is called:

goiter

The element necessary in the diet for proper thyroid function is

Iodine

Hyposecretion of the adrenal cortex hormones results in skin bronzing, feeling of burn-out, and suppression of the immune system; this condition is known as

addisons disease

The "fight-or-flight" response triggers the release of

epinephrine (adrenalin)

The study of hormones and endocrine organs is known as immunology

false

All hormones can arouse and bring about changes in all cells of the human body

false

The hormones secreted by the posterior pituitary are actually made by the hypothalamus.

true

Ear wax is produced by?

Ceruminuos Glands

The structure that divides the middle ear from the outer is a membrane known as?

Tympanic membrane

Thymosin is produced where?

Thymus

What gland produces melatoin

pineal

what produces testostrone

Testes

Glands that act as anagonist to thyroid

parathyroid

Gland that hangs from the from the hypothalmus

pituitary gland

producer of female hormones

Ovaries

gland responsible for metabolism

thyroid

where are cones located in the eye

Retina

what part of the eye lacks photoreceptors?

Optic disc

storehouse for hormones

pituitary gland

produces steroid hormones

adreneal

neuroendocrine organ

hypothalmus

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set