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Eye and Endocrine system Jamie (homeostatic Imbalances (ADH deficiency,…
Eye and Endocrine system Jamie
eye structure
walls: fibrous, vascular, inner layers
cornea: transparent, light bending
pupil: lets light hit retina
iris: colored part of the eye
lens: part that focuses by changing shape
ciliary zonule: fibers that connect lens to ciliary body
ciliary body: change the shape of the lens
ora serrata: between retina and ciliary
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the lens changes shape with the help of the ciliary body depending on how far or close an item is
far distance: the lens flattens
for close distance: the lens bulges
The Endocrine System
The nervous system regulates the activities of muscles and glands
fast response
short duration response
acts via action potentials and neurotransmitters and at specific locations
The endocrine system influences metabolic activity by hormones
slow response
long duration
Hormones act over long distances
critical properties
solubility in water affects how that hormone is transported in blood, how long before it degrades, what receptors act upon it
hormones act on receptors in 2 ways: water-solute hormones act on receptors in plasma membrane, lipid soluble hormones act on receptors inside of the cell
homeostatic Imbalances
ADH deficiency
Diabetes Insipidus
intense thirst
huge urine input
caused by pituitary tumor or damage to the hypothalamus or posterior pituitary
hyper secretion and hyposecetion of GH
can cause structure abnormalities such as gigantism and hyper secretion can cause infertility in females
diabetes mellitus
happens because of the hypo secretion/ hypoactivity of insulin
there is no insulin present
type 2 is when there is too much insulin present
overactivity and under activity of thyroid gland
metabolic disturbances
inadequate TSH or TRH
homeostasis
negative feedback: returning back to homeostasis
positive feedback: response to achieve a particular result
glands
anterior pituitary
posterior pituitary
thyroid
parathyroid
adrenal cortex
adrenal cortex
pancreas
testes
ovaries
pineal gland
thymus