Lab Exam 2 Functions Flashcards
Hormones secreted by the anterior pituitary gland?
- Luteinizing hormone
- Thyroid- stimulating hormone
- Growth hormone
Hormones secreted by the posterior pituitary gland?
- Oxytocin
2. Antidiuretic hormone (ADH)
Hormones secreted by the thyroid gland?
- T3
- T4
- Calcitonin
Hormones secreted by the parathyroid gland?
- Parathyroid hormone (PTH)
Hormones secreted by the adrenal cortex ?
- Cortisol
- Androgens
- Aldosterone
Hormones secreted by the adrenal medulla?
- Epinephrine
- Norepinephrine
( both increases cardiac activity)
Hormones secreted by the pancreatic islets of the pancreas?
- Insulin (raises blood glucose levels)
2. Glucagon (lowers blood glucose levels)
Hormones secreted by the thymus?
- Thymosin (maturation of T lymphocytes)
Hormones secreted by the pineal gland?
- Melatonin (regulates circadian rhythm)
Hormones secreted by the testes?
- Testosterone (stimulates spermatogenesis)
Hormones the follicular cells in the ovaries secret?
- Estrogen
Hormones secreted by the corpus luteumn the ovaries?
- Progesterone
Function of the olfactory neurons (chemoreceptors) ?
Detect odors
Function of olfactory tracts?
Carry olfactory information to other parts of the brain
Function of supporting cells?
Support and surround olfactory neurons
Function of basal cells?
Replacement of olfactory neurons
Function of primary olfactory cortex?
Awareness and identification of odor
What is the function of the lacrimal gland?
Secrete a whitish lubricating substance
What is the function of the tarsal glands?
Secretes oil to prevent eyelids from sticking together.
What is the function of the tarsal plate?
Stiffen each eyelid
What is the function of the eyelids?
Prevent objects from entering the eye and distribute tears across the eye when blinking
What is the function of the eyebrows?
Prevent perspiration from running in the eyes
What is the function of the eyelashes?
prevents debris from entering the eye
What is the function of conjunctiva?
Lines posterior surface of the eyelids
What is the function of the lacrimal apparatus?
Produces tears and drains them from the eyes
What is he function of the sclera?
Maintain the shape of the eyeball
What is the function of the cornea?
Admits light into the eye and focus it
What is the function of the choroid?
Reduce the scattering of light
What is the function of the suspensory ligaments?
Connects the ciliary body to the lens
What is the function of the ciliary body?
Changes the shape of the lens to focus the light on the retina
What is the function of the iris?
Determines the color of the eye
What is the function of the pupil?
Allows light to enter the eye
What is the function of vitreous humor?
Fluid that maintains the shape of the eyeball
What is the function of the utricle and saccule (vestibule)?
Convey stimuli about the head tilting and linear movement; filled with endolymph
What is the function of photoreceptor cells?
Specialized to detect the presence of light and produce a neural signal
What is the function of the lens?
Focus light on the retina from objects near the eye
Contains a large amount of photoreceptors (cones)
Macula lutea
Contains a large amount of photoreceptors; located in the center of a yellowish region called the macula lutea
Fovea centralis
Does not contain any photoreceptors and does not capture any visual image
Optic disc (blind spot)
What is the function of the auricle?
Funnels waves into the external auditory canal
What is the function of the external auditory canal?
Transfer sound from the auricle the the tympanic membrane (eardrum)
What is the function of the tympanic membrane?
Transport sound from the air to the auditory ossicles inside the middle ear and then to the oval window in the fluid-filled cochlea; separates outer ear from the inner ear
What is the function of the malleus?
Transports vibrations from the tympanic membrane to the incus
What is the function of the incus?
Transports vibrations between the malleus and stapes
What is the function of the stapes?
Transports vibrations from the incus to the oval window in the inner ear
What are the sweat glands in the external auditory canal called and what do they do?
Ceruminous glands that secrete a yellowish-brown to gray cerumen (earwax)
What is the function of cerumen (earwax)?
Lubricates and waterproofs the external auditory canal and tympanic membrane, traps debris from reaching the tympanic membrane and sweeps it out of the auditory canal.
What is the function of the Pharyngotympanic tube (Auditory tube)?
Equalize pressure on both sides of the tympanic membrane
What fluid is found in the membranous labyrinth?
Endolymph
What is the fluid between the bony labyrinth and the membranous labyrinth?
Perilymph
What is the function of Perilymph and endolymph?
Transduce sound waves and head movements into neural signals
What are the two portions of the membranous labyrinth that the vestibule house?
Utricle and Saccule
What is the function of the semicircular canals?
Detect rotation of the head
What is the function of the ampulla?
Swelling on the ducts of the cochlear that contains receptor cells in contact with neurons
What is the function of the cochlea?
Transports the vibrations of auditory sound into impulses the brain can interpret
What is the function of the oval window?
Allow for pressure changes between the middle ear and cochlea
What is the function of the round window?
Separates the middle and inner ear
What are the three chambers of the cochlea?
Scala Vestibuli
Scala Media ( cochlea duct)
Scala Tympani
What two chambers of the cochlea chamber contains Perilymph?
Scala Vestibuli and Scala Tympani
What chamber of the cochlea contains endolymph?
Scala media (cochlear duct)
What is the function of the vestibular membrane?
Seperates the endolymph and Perilymph
Function of the basilar membrane?
Supports the organ of corti
What is the function of the organ of corti?
Contains receptor cells for hearing
What is the function of inner hair cells?
Detects sound
What is the function of the tectorial membrane?
Makes the stereocilia bend
Microvilli that project the hair cell; arranged from tallest to shortest
Stereocilia