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LuvianoFernandaEyeEndocrine (major eye structures (Ciliary= is muscle an…
LuvianoFernandaEyeEndocrine
major eye structures
Ciliary= is muscle an controls the shape of lens
Lens= focuses light rays onto fovea
Rods= function under cones
Cones=they detect different wave lengths of radiation
Retina=later of sensory receptor
Fovea= a small depression with high concentration of cones
Optic disc= has no receptors connected to optic nerve
Conjunctiva=mucus membrane covering the front surface of sclera and lining eyelid
General characteristics of different types of hormones
Endocrine system = works with the nervous system to maintain homeostasis secretes hormones into body fluids hormones diffuse to blood stream to act on target cells
Exocrine= secreta products into ducts
Endocrine glands= secrete products into body fluid to affect target cells
Steroid hormones = made of cholesterol are lipid soluble and can pass through cell membrane hormones located in side target cells
Nonsteriod hormones= receptors aré in target cells membrane triggers a cascade of reactions inside cell
Prostaglandins = affect organ in which are produced . Prostaglandins produce many of effects some stimulate seceration or other hormones
Controll hormonal secretions = hormone levels are very pre
Disorders of the eye
Cataracts= clouding of the lens that causes the worlds to appear foggy
Glaucoma= the aqueous humor is blocked and fluid gets clogged pressure in the eye can cause damage to the retina and optic nerve
Hyperplasia= distant objects focused behind the retina close objects seem blurry
Astigmatism= unequal curvatures in different parts of the cornea or the lens seem blurry
Myopia= distant object are focused in front of the retina instead of being on it
Color blindness= lack of one or more cone it is inherited. As an x-linked condition common in males than females
Homeostatic imbalances associated with the endocrine system
Hypersecretion= caused by pituitary tumor results in gigantism
Hyposecretion = of gh results in pituitary dwarfism
Graves’ disease= autoimmune disorder that causes hyperthyroidism
Hypothyroidism =under active thyroid
Cretinism = insulin produced by beta cells released gene blood glucose levels are high
Cushings disease= too much colestral in body for a long period of time
Diabetes mellitus = beta cells don’t make insulin causing high blood pressure