Lesson 3 - Olfaction, Taste, and Endocrine Flashcards
where are chemoreceptors located for taste and smell?
the olfactory epithelium at the roof of the nasal cavity
how are chemoreceptors distributed throughout the nasal cavity?
non-uniformly
oral cavity includes (5)
- dorsal tongue
- soft palate
- epiglottis
- pharynx
- interior cheeks
three types of papillae
foliate
fungiform
vallate
foliate papillae
where are they located?
located on the side walls of posterior tongue
fungiform papilae
where are they located?
located on the superior surface
vallate papillae
arranged in a V formation on the posterior surface
taste buds
composed of globular arrangements of gustatory epithelial cells and basal epithelial cells
gustatory epithelial cells
the receptor cell responsible for taste sensation, developed from support cells
basal epithelial cells
stem cells that develop into support cells
taste pore
opening that exposes taste cell microvilli (gustatory hairs) to the oral cavity
gustatory hair
from gustatory epithelial cell; contact with certain chemicals causing the gustatory receptor to depolarize
what nerve carries sensory info from the anterior 2/3 of the tongue?
facial VII
what nerve carries info from the posterior 1/3 of the tongue?
glossopharyngeal IX
what nerve carries sensory info from the pharyngeal area?
not glossopharyngeal
vagus X
endocrine system
helps nervous system coordinate/integrate body activity by releasing hormones into the circulation system
a specific hormone affects only?
its target cell
pituitary gland
attached to the hypothalamus through the infundibulum (stalk) and has two functional lobes
adenohypophysis
anterior pituitary
where does the anterior pituitary release its hormone?
through the hypophyseal portal system
hypophyseal portal system (3)
primary and secondary capillary beds and the hypophyseal portal veins
follicle-stimulating hormone (FSH)
gonadotropin regulating gonad gamete production/hormone activity
luteinizing hormone (LH)
gonadotropin regulating gonad gamete production/hormone activity
adrenocorticotropic hormone (ACTH)
regulates adrenal cortex activity
thyroid-stimulating hormone (TSH)
regulates activity of thyroid gland
tropic hormones (4)
FSH, LH, ACTH, and TSH
growth hormone (GH)
regulated body/muscle/bone growth
prolactin (PRL)
regulates breast development/lactation in females
neurohypophysis
posterior pituitary
six hormones released by the anterior pituitary gland
FSH, LS, ACTH, TSH, GH, PRL
oxytocin
what does it stimulate?
stimulates uterine contract (birth and coitus) and milk ejection in lactation
antidiuretic hormone (ADH)
stimulates kidney collecting tubules to reabsorb water from urinary filtrate and increased blood pressure via vasoconstriction of aterioles
what hormones does the posterior pituitary release? (2)
oxytocin and antidiuretic hormone
pineal gland
located on the roof of the 3rd ventricle in the brain
melatonin
involved in biological rhythms; may have inhibitory effect on reproductive system (prevents precocious sexual maturation)
what hormone does the pineal gland release?
melatonin
thyroid
located in the throat
what hormones does the thyroid release?
thyroid hormone (TH); thyroxine (T4) and triiodothyronine (T3)
thyroid hormone (TH)
controls body metabolism and cellular oxidation