ENDOCRINE SYSTEM Flashcards
allows cells to communicate with each other
chemical messenger
stimulates the cell that originally secreted it
autocrine
secreted by neurons
neurotransmitters
local messengers secreted by one cell type
paracrine
secreted into bloodstream
endocrine
what does endocrine system secreted?
hormones
large molecules diffuse from blood into tissue slowly
a. protein
b. steroid hormone
c. thyroid hormone
d. fats
a. protein
small molecules attached to binding proteins for transport
a. thyroid hormone
b. peptide
c. amino acids
a. thyroid hormone
stimulated by action potential, releasing neurotransmitter from neurons
a. humoral stimuli
b. neural stimuli
c. hormonal stimuli
b. neural stimuli
Refer to the regulation of hormone release in response to changes in the blood’s levels of certain ions or nutrients.
a. humoral stimuli
b. neural stimuli
c. hormonal stimuli
a. humoral stimuli
Hormone is secreted to stimulates the secretion of other hormones
a. humoral stimuli
b. neural stimuli
c. hormonal stimuli
c. hormonal stimuli
prevent hormone secretion once a set point is achieved
a. positive feedback
b. negative feedback
b. negative feedback
the stimulation of hormone secretion increases over time
a. positive feedback
b. negative feedback
a. positive feedback
proteins where hormones bind
receptor
location on cell where hormones bind
receptor site
found in cell nucleus where the lipid-soluble hormones bind
a. nuclear receptor
b. membrane-bound receptor
a. nuclear receptor
found in the cell surface where water-soluble hormones bind
a. nuclear receptor
b. membrane-bound receptor
b. membrane-bound receptors
Small glands that rest in sella turcica which is controlled by hypothalamus
Pituitary gland/hypophysis
Secretion are controlled by hormones that pass through hypothalamic-pituitary portal system
Anterior pituarity
Hormones secreted are controlled by action potentials carried by axons that pass from hypothalamus
Posterior pituitary
Made up of two lobes connected by isthmus
Thyroid gland
What are the hormones of thyroid gland?
Thyroxine, triiodothyronine, calcitonin
Enlargement of thyroid gland, can develop from too low iodine
A. Goiter
B. Cretinism
C. Myxedema
A. Goiter
Hypothyroidism that occurs in infant which is characterized by mental retardation and abnormally formed skeletal structure
A. Goiter
B. Cretinism
C. Myxedema
B. Cretinism
Accumulation of fluid and other molecules in subcutaneous tissue of the skin
A. Goiter
B. Cretinism
C. Myxedema
C. Myxedema