ENDOCRINE SYSTEM (LAB) Flashcards
both an endocrine and exocrine gland. A long, narrow mass of glandular tissue that resembles a fish.
pancreas
two-lobed gland located in the anterior mediastinum.
thymus gland
Are organic molecules derived from lipid or proteins
hormones
tiny masses of tissue are embedded in the posterior surface of the thyroid.
parathyroid gland
Includes a number of glands that secrete regulatory chemicals called hormones into the blood for distribution throughout the body.
endocrine glands
tiny, pea-shaped gland is located on the inferior aspect of the brain.
pituitary gland
pair of glands, each located on the superior surface of a kidney.
adrenal gland
outermost region, it is just deep to the capsule organ. Here, cells are arranged in balls and loops.
Zona Glomerulosa
Tiny structure already been identified as a nervous structure in the diencephalon of the brain.
pineal gland
pair of female gonads are ovoid organs within the pelvic cavity.
ovaries
a loop that regulates the balance of hormones in the body by controlling the production of hormones.
feedback mechanism
pair of male gonads (primary sex organs) are ovoid organs in the sac-like scrotum external to the lower anterior trunk.
testes
innermost zone. Cells in this region form branched rows
Zona reticularis
single gland, located on the anterior aspect of the
trachea (windpipe), near the larynx (voice box).
thyroid gland
middle and thickest region of the cortex. The cells in this zone form rather straight rows that are perpendicular to the gland’s surface
Zona fasciculata
grow until puberty and then degenerates through adulthood
thymus gland
slow or stop secretion when the metabolic changes triggered in the target cells become evident or when blood hormone concentrations get too high.
negative feedback
less commonly observed, results in an increased hormone secretion when the metabolic changes become evident or blood hormone level increase.
positive feedback
It resembles a bow tie. It has two lateral lobes and a narrow medial isthmus that joins joins them in the middle.
thyroid gland
