Chapter 12-13 Review Flashcards
a ring of colored muscle that works to adjust the diameter of the pupil
iris
changes shape for near & far vision
lens
large eye cavity filled with vitreous humor
posterior cavity
outermost layer of the eye
sclera
the curvature of the lens of the eye changes shape to allow the eye to focus on a near object called __
accommodation
where are the structures for hearing found?
cochlea
which of the following is a structure of the middle ear?
malleus
which eye structure(s) secretes thin mucous film to help keep the eyeball moist?
conjunctiva
what is the center point of the retina as seen through an ophthalmoscope?
macula lutea
which part of the retina produces the sharpest vision & why?
the fovea centralists produces the sharpest vision because most of the cons are concentrated here
the process of bending light rays so they can focus on the retina is called __
refraction
clouding of the lens, making vision blurry
cataracts
myopia
nearsightedness
hyperopia
farsightedness
normal vision
emmetropia
age related loss of flexibility of the lens to change shape causing trouble focusing
presbyopia
increased intraoccular pressure
glaucoma
which glands sit on top of each kidney?
adrenals
this gland lies just behind the stomach & is a endocrine & exocrine gland; also contains the islets of langerhans, some of which secrete insulin
pancreas
low levels of calcium in the blood
hypocalcemia
hypersecretion of growth hormone during childhood
gigantism
hypersecretion of cortisol from the adrenal glands causing moon face
Cushing syndrome
low levels of melatonin resulting from lack of sunlight
SAD
inadequate amount of insulin or diminished amount of insulin receptors
diabetes
too much secretion of insulin can cause blood sugar levels to drop
hypoglycemia
hypersecretion of growth hormone during adulthood
acromegaly
elevated amount of sugar in the blood
hyperglycemia
disorder resulting from hypersecretion of thyroid hormone
graves disease
a protrusion of the eyeballs seen in graves disease
exophthalmos
