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44 terms

Chapter 13: Endocrine System

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what occurs when a hormone reaches their target cells?
the hormone binds to an appropriate receptor on the target cell.
what are the 2 main targets of the antidiuretic hormone? (ADH)
the kidneys & blood vessels
In general, sensory input to a portion of the neuroendocrine system causes...
releases hormones
Hormone molecules are typically transported to the target cells by...
the bloodstream
Antidiuretic hormone (known as ADH or vasopressin)...
increases water rentetion
The posterior pituitary produces both inhibiting and releasing hormones.
FALSE
The pituitary gland is located in the...
Hypophyseal fossa
The hypothalamus is sometimes referred to as the "master control center" of the endocrine system because it...
Regulates most endocrine functions of the body
The pancreas serves both endocrine and exocrine functions.
TRUE
The pancreas is located..
between the duodenum and spleen, just inferior to the stomach
The endocrine portion of the pancreas produces...
insulin & glucagon
The pancreatic acinar cells secrete...
enzyme rich pancretic juice
Which pancreatic islet cell type is correctly matched with its product?
beta cells : insulin
Type 1 diabetes mellitus is caused by
a disorder of the immune system
The pancreas functions as part of the endocrine system and as a part of the ______ system.
Digestive system
The hormone that the pineal gland secretes is
melatonin
The thymus gland secretes hormones called _____ that _______.
thymosins; control production and differentiation of white blood cells
* the _______ senses high osmolarity in the plasma
kidney
*_____ Neurons bring the information of high osmolarity to the hypothalamus
Sensory
*The supraoptic nerves of the ______ fires impulses in response to the high osmolarity.
hypothalmus
*the impulses from the hypothalmus travel through the ______ in the hypothalamo-hypophseal tract.
infundibulum
*exocytosis of ADH from synaptic endings in the ______ pituitary.
posterior
Hormones that the posterior pituitary secretes are synthesized in the
hypothalamus
-- the _______ stretches.
cervix
-- ____ neurons bring the information of stretch to the hypothalmus.
sensory
-- the paraventricular nucleus of the ______ fires impulses in response to the stretch.
hypothalmus
-- the impulses from the hypothalmus travel through the _______ in the hypothalamo-hypophyseal tract.
infundibulum
-- exocytosis of oxytocin from synaptic endings in the ______ pituitary
posterior
President John F. Kennedy had
addisons disease
A steroid hormone acts on a target cell by
directly causing protein sysnthesis
Graves disease, the most common form of hyperthyroidism, is caused by
an autoimmune system disease
Exocrine glands differ from endocrine glands in that exocrine glands
secrete through ducts or tubes to the body's exterior.
ADH and oxytocin are secreted by
neurosecretory cells
The specificity of hormone action derives from
target cell receptors that are unique for the hormone
endocrine means..
internal secretion.
A sweat gland is an example of a(n) _______ gland.
exocrine
Growth hormone signals the release of
IGF-1
A hormone is a ______ and the target cell is __________.
molecule that has a metabolic effect on another cell; a cell that has receptors for specific hormones
__________ controls hormone concentrations.
negative feedback
Oxytocin is administered to women following childbirth to stimulate
uterine contractions
all hormones are
organic compounds
Type 2 diabetes mellitus results from
insensitivity of cells to insulin
The pineal gland is located
attatched to the thalamus
A hormone has a half-life of 20 minutes. After an hour, ___ percent of the original number of molecules remains.
12.5