endocrine Flashcards
collection of glands that secrets hormones
endocrine system
regulates our mood, growth and development, tissue function, metabolism, reproductive processes
endocrine system
chemical messengers
hormones
travel through the bloodstream to target organs or tissues, where they regulate a wide range of physiological processes
- play a key role in growth, metabolism, reproduction, mood, and maintaining internal balance
hormones
they are produced in very small quantities and are biologically very active; usually measured in micrograms or milligrams per day.
-their excess and deficiency, both, cause serious disorders
hormones
secreted by cells into the extracellular fluid and affect the function
of the same cells that produced them.
autocrine signaling
secreted by cells into the extracellular fluid and affects neighboring target cells of a different type
paracrine signaling
secreted by neurons into the circulating blood and
influence the function of target cells at another location in the body.
endocrine signaling
group of cell that produces and secrets or give off chemical
glands
these glands secrete hormones directly into the bloodstream, which then travel to target organs or tissues throughout the body
endocrine glands
these glands secrete substances (like enzymes, sweat, or saliva) into ducts that carry these secretions either to the surface of the body or into body cavities.
exocrine glands
master gland“ -located at the base of the brain -produces hormones that regulate other endocrine glands
pituitary gland
located in the front of the neck
-produces thyroid hormones (Thyroxin (T3) and Tri-iodothyronine (T4)) that regulate metabolism, energy levels, and growth
- produces calcitonin, which helps regulate calcium levels in the blood.
thyroid gland
four small glands located behind the thyroid gland
-produce parathyroid hormone (PTH), which regulates calcium levels in the blood
parathyroid glands
located on top of each kidney
-consist of two parts: the adrenal cortex
and the adrenal medulla
-produce hormones like: Cortisol (stress hormone) Aldosterone (regulates blood pressure)
Adrenaline (epinephrine) and norepinephrine (involved in the fight-or-flight response)
adrenal glands