fibrous, vascular and internal tunics
the 3 layers of tissue (tunics) that make up the eye
posterior portion of the eye (white part)
the anterior portion of the eye (clear part and protrudes)
blind spot/optic disc
the point of exit of the optic nerve and blood vessels
located at the posterior pole and has high concentrations of photoreceptors
is a depression in the center where the highest concentration of photoreceptors is located
the optic disc does not contain...
tears produced when a person cries wash objects away and contain...
lens separates eye into superior and inferior
constantly produce tears
nose runs when crying
tears drain inferior, medially to the lacrimal puncta to the nasal pharynx...that's why...
rods contain the photopigment
black and white and very sensitive
cornea and lens
focusing is done at the
what are blue, red, and green
happens to rod cells they need rhodopsin to dim
effects of aging to the eye
lens becomes yellow because of UV rays, pupil dilation decreases, loss of lens elasticity, and accumulation of cellular debris
direction from which sound is coming is determined by frequency of
is received when the basilar membrane vibrates and hair cells back and forth over the tectorial membrane
external auditory meatus
extends from the auricle to the tympanic membrane
is attached to the tympanic membrane on the outside..not the cochlea
transmit and amplify vibrations
the vestibule and semicircular canals are responsible for
loudness is related to amplitude t or f
includes saccule, semicircular ducts, and utricles
vistriucous humour is more thick than aquaeous humour t or f
otitis media is more common in children than adults t or f
lens is elastic and capable of changing shape t or f
responsible for weight gain
position of head
with respect to gravity is determined by impulses transmitted from macula of utricle and sacuule
is a system of ductless glands that releases products into interstitial fluid and also produces hormones that are released into extracellular space (blood) for transport
is second messenger
neurohypophysis and adenohypophysis
the two functional portions of the pituitary gland are
neurohypophysis the posterior lobe is connected to the hypothalamus by
stimulates smooth muscles of the uterus to contract
Antidiurectic hormone (ADH)
causes reabsorption of water from kidneys and promotes fluid retention
prevents outputs of large amounts of urine
is not secreted by the adenohypophysis
FSH, LH and ACTH
are secreted by the adenohypophysis
follicle stimulating hormone
known as FSH...stimulates the development of ovarian follicles
initiates and maintains milk production in females
long feedback loop
is when levels of hormone reach a certain level, it is detected by the pituitary or other gland(hypothalamus) and the body stops producting it(causing inhibition)
blood calcium levels
parathyroid glands increase in response to a decrease in the
secretes endorphins, increase secretion during exercise, and helps adapting to stress
hormones and target cells use receptor sites to ?
influences metabolism of carbs
islet of langerhans
also known as (pancreatic islets) produces insulin and glycogen
when blood sugar decreases, insulin decreases and what increases?
Iodine is necessary for?
Does decrease of ADH or increase cause more diluted urine?
portion of the pituitary that extends directly from the hypothalamus is the?
the primary effect of glycogon is on what organ?